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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3012574 times)
faetos
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gotta let a coin be a coin


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July 03, 2014, 05:11:01 AM
 #36421

People need to stop complaining about KNC and start using their brains before dumping out $10k on a pre-order. Trust me, I know the feeling. You see a brand new product and want to be one of the first to order it. Your blood pressure increases, you make typing mistakes on the keyboard because you want to move faster, you move some of that bitcoin around and BAM, make that purchase. Then right after the purchase, go to the forum and post a thread that you just ordered blah blah blah blah blah and can't wait to get it. Start posting what order# you got and the torture starts.


So true. Been there, done that, stopped doing it. If the Math doesn't work out then don't do it.
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July 03, 2014, 05:47:39 AM
 #36422

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

If someone can mount an Corsair H80 on the chip and mount a push/pull fan configuration right on the side of the box you can literally bring the size of that box down to a small shoe box size. I've been using that Corsair H80 on my overclocked Intel 3930K processor for a while now and works great. It is a completely sealed system and keeps the processor cool at all times. If there is a will, there would be a way. The ASIC chips are larger in size, so making it work would take a good DIY'er.


https://bitcointalk.org/index.php?topic=616090.0
https://bitcointalk.org/index.php?topic=313978.msg5536997#msg5536997
http://i.imgur.com/vf9eekv.jpg
http://i.imgur.com/GXvNz3g.jpg
http://i.imgur.com/oZW5Bfs.jpg
http://i.imgur.com/uhhZlLx.jpg
http://i.imgur.com/IJzV8fA.jpg
http://i.imgur.com/xoHsaiJ.jpg
http://i.imgur.com/tQSoEJI.jpg
  being the actual chip package is the same size, I'd imagine so....
there were others... can't seem to find
* The Jupiters came just as "maxed out".  A true "hardware junkie" can get pretty far. If you increase your hashrate by say 20%,
for say... arguably 500 dollars(less than one twentieth of the neppy price)... you just increased your ROI by a substantial amount.
"Trance2" got 1000mhz, 758 Gh/s @ 50C out of October jupiters with watercooling and a bin file alteration. If you got that from Neppie....
in comparison, most unaltered Oct Jupiters get about 550-560Gh/s...
He increased his ROI by arouund 50% with about 500 bucks.
Sound better now?

Get crackin' Padrino....    Wink  



I made a small bin file for those not sure how to apply oc setting via cgminer.sh.

The bin file is loaded via the upgrade tab in miner administration just like you would upload a firmware. On reboot the modification will be gone again and bin file will have to be uploaded again in order to apply oc setting.

The bin file contains a folder with two files:

runme.sh
Code:
#!/bin/sh
cp cgminer.sh /etc/init.d/cgminer.sh
echo "900MHz OC setting copied! Please go back to Miner Settings page and Restart Miner <b>without rebooting</b> by <a href=\"/miner_setting.html\">clicking here</a>."

cgminer.sh
Code:
#!/bin/sh

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

use_bfgminer=
if [ -f /config/miner.conf ]; then
. /config/miner.conf
fi
if [ "$use_bfgminer" = true ] ; then
DAEMON=/usr/bin/bfgminer
NAME=bfgminer
DESC="BFGMiner daemon"
EXTRA_OPT="-S knc:auto"
else
DAEMON=/usr/bin/cgminer
NAME=cgminer
DESC="Cgminer daemon"
EXTRA_OPT=
fi

set -e

test -x "$DAEMON" || exit 0

do_start() {
# Stop SPI poller
spi_ena=0
i2cset -y 2 0x71 2 $spi_ena

good_ports=""
bad_ports=""

# CLear faults in megadlynx's
for b in 3 4 5 6 7 8 ; do
for d in 0 1 2 3 4 5 6 7 ; do
i2cset -y $b 0x1$d 3 >/dev/null 2>&1 || true
done
done

for p in 0 1 2 3 4 5 ; do
i2cset -y 2 0x71 1 $((p+1))
good_flag=0
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,3,0,0,0,0,0,0 | tail -c 13)"
                if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,2,0,0,0,0,0,0 | tail -c 13)"
                if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,1,0,0,0,0,0,0 | tail -c 13)"
                if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,0,0,0,0,0,0,0 | tail -c 13)"
                if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi

if [ "$good_flag" = "1" ] ; then
good_ports=$good_ports" $p"
else
bad_ports=$bad_ports" $p"
fi
done

if [ -n "$good_ports" ] ; then
for p in $good_ports ; do

# Re-enable PLL START MOD FW 1.01
i2cset -y 2 0x71 1 $((p+1))
for c in 0 1 2 3 ; do
cmd=$(printf "0x84,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
# cmd=$(printf "0x86,0x%02X,0x02,0x01" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x11" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x21" $c)
cmd=$(printf "0x86,0x%02X,0x02,0x31" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x41" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x51" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
cmd=$(printf "0x85,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
done
# END MOD FW 1.01

# re-enable all cores
i=0
while [[ $i -lt 192 ]] ; do
i2cset -y 2 0x2$p $i 1
i=$((i+1))
done
spi_ena=$(( spi_ena | (1 << $p) ))
done
fi
if [ -n "$bad_ports" ] ; then
for p in $bad_ports ; do

# Disable PLL START MOD FW 1.01
i2cset -y 2 0x71 1 $((p+1))
for c in 0 1 2 3 ; do
cmd=$(printf "0x84,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
done
# END MOD FW 1.01

# disable all cores
i=0
while [[ $i -lt 192 ]] ; do
i2cset -y 2 0x2$p $i 0
i=$((i+1))
done
spi_ena=$(( spi_ena & ~(1 << $p) ))
done
fi

# Disable direct SPI
i2cset -y 2 0x71 1 0

# Enable SPI poller
i2cset -y 2 0x71 2 $spi_ena

start-stop-daemon -b -S -x screen -- -S cgminer -t cgminer -m -d "$DAEMON" --api-listen -c /config/cgminer.conf $EXTRA_OPT
}

do_stop() {
killall -9 bfgminer cgminer 2>/dev/null || true
}
case "$1" in
  start)
        echo -n "Starting $DESC: "
do_start
        echo "$NAME."
        ;;
  stop)
        echo -n "Stopping $DESC: "
do_stop
        echo "$NAME."
        ;;
  restart|force-reload)
        echo -n "Restarting $DESC: "
        do_stop
        do_start
        echo "$NAME."
        ;;
  *)
        N=/etc/init.d/$NAME
        echo "Usage: $N {start|stop|restart|force-reload}" >&2
        exit 1
        ;;
esac

exit 0

runme.sh will copy a modified version of cgminer.sh set for 900MHz to /etc/init.d/ overwriting the original cgminer.sh

After uploading the bin file, you need to go to the mining tab in administration and pick Restart Miner in order to apply setting.

Content of bin file can be examined and modified using e.g. 7zip

Other oc settings are listed in the modified cgminer.sh like:

Code:
# cmd=$(printf "0x86,0x%02X,0x02,0x01" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x11" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x21" $c)
 cmd=$(printf "0x86,0x%02X,0x02,0x31" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x41" $c)
# cmd=$(printf "0x86,0x%02X,0x02,0x51" $c)

# are disabled settings

Active setting is 231 which corresponds to 900MHz:

Code:
cmd=$(printf "0x86,0x%02X,0x02,0x31" $c)

Lowest disabled setting is 201 which corresponds to 825MHz:

Code:
# cmd=$(printf "0x86,0x%02X,0x02,0x01" $c)

Highest disabled setting is 251 which corresponds to 950MHz:

Code:
# cmd=$(printf "0x86,0x%02X,0x02,0x51" $c)

If you wish to go beyond these ranges, then look up the list of settings posted in various threads here.

Applying any other setting than the active 231 setting require that you modify the cgminer.sh in the bin file.

I take no responsibility for any damage due to oc if such should occur. The 231 setting is quite safe if you have proper cooling, but you will probably need to adjust die voltages to match the higher asic frequency.

Any changes made to voltages in Advanced Settings, will reset frequency to stock default setting and you will have to pick Restart Miner in the Mining tab in order to reapply oc settings.

Download available here:

https://www.dropbox.com/s/8w4dacsp8r1u9eu/1.01.900MHz.bin

Thanks to all those who shared their findings in this great thread.
no actually if you got two advanced settings you can go past 1000mhz i am currently @ 940ghs with 1050 power supply.
hehe, 950 gh/s on a jupiter.

Following old tricks...   same thing could be done with Neppie    


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xhomerx10
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July 03, 2014, 02:35:44 PM
 #36423

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

If someone can mount an Corsair H80 on the chip and mount a push/pull fan configuration right on the side of the box you can literally bring the size of that box down to a small shoe box size. I've been using that Corsair H80 on my overclocked Intel 3930K processor for a while now and works great. It is a completely sealed system and keeps the processor cool at all times. If there is a will, there would be a way. The ASIC chips are larger in size, so making it work would take a good DIY'er.



 Do you know how much heat the H80 can remove?  I think those ASICs are about three times the power draw of your 3930k... it probably wont be enough.

Don't let sidehack fade away...【ツ】Buy him a burger!   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
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July 03, 2014, 04:05:54 PM
 #36424

There was actually "Talk" early on about a dc/dc "Team" who was supposedly working on a custom solution if I remember correctly.... evidently that never transpired.

 Nobody volunteered a Neptune box as a guinea pig and the crowd funding never got off the ground.
I might play around with one of my 4 VRM Saturn modules and see if I can upgrade the VRMs on it.  The problem is, they are GE Critical Power modules so any results wont be conclusive for Neptune owners.


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July 03, 2014, 05:19:31 PM
 #36425

thanks for donation btc for my english!!!!

btc adress is

1ALEoQMkQ1Pd5TedE2uc876kHF4KDC5haD

 Grin Grin Grin Grin Grin Grin Grin Grin
Phoenix1969
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LIR DEV


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July 03, 2014, 06:03:02 PM
 #36426

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

If someone can mount an Corsair H80 on the chip and mount a push/pull fan configuration right on the side of the box you can literally bring the size of that box down to a small shoe box size. I've been using that Corsair H80 on my overclocked Intel 3930K processor for a while now and works great. It is a completely sealed system and keeps the processor cool at all times. If there is a will, there would be a way. The ASIC chips are larger in size, so making it work would take a good DIY'er.



 Do you know how much heat the H80 can remove?  I think those ASICs are about three times the power draw of your 3930k... it probably wont be enough.

That depends on the speed of your fan, and ambient temps; but it can dissipate up to about 2500 watts according to a Corsair support specialist, but he couldn't give me solid figures although I think that's a lofty estimate we don't need nearly that.
theres the H-100 as well, but were only talking about a single asic here... about 150-200 watts max per asic (300 watts total draw for the entire cube according to KNC) found here: https://www.kncminer.com/news/news-96 The asic alone may be half that maximum(an estimation)
It can be done with H60's.     How many watts of you think that cooling tower is capable of? It's already pushing it's spec limit in warmer climates.
Surely even an H60 will be far superior to that bulky archaic arctic tower heatsink.


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Easy2Mine
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PikcioChain ICO Starts on 24th of November


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July 03, 2014, 06:09:12 PM
 #36427

What is the price of a H60?


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Phoenix1969
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July 03, 2014, 06:12:58 PM
 #36428

What is the price of a H60?
http://www.amazon.com/Corsair-Series-Performance-Liquid-Cooler/dp/B00A0HZMGA/ref=sr_1_1?ie=UTF8&qid=1404411121&sr=8-1&keywords=h60
so yeah, 5 of those H60's run about 290 dollars shipped.    Gotta be "cost effective" there.


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xhomerx10
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July 03, 2014, 06:34:24 PM
 #36429

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

If someone can mount an Corsair H80 on the chip and mount a push/pull fan configuration right on the side of the box you can literally bring the size of that box down to a small shoe box size. I've been using that Corsair H80 on my overclocked Intel 3930K processor for a while now and works great. It is a completely sealed system and keeps the processor cool at all times. If there is a will, there would be a way. The ASIC chips are larger in size, so making it work would take a good DIY'er.



 Do you know how much heat the H80 can remove?  I think those ASICs are about three times the power draw of your 3930k... it probably wont be enough.

depends on the speed of your fan, and ambient temps; but it can dissapate up to about 2500 watts according to a Corsair support specialist, but he couldn't give me solid figures
theres the H-100 as well, but were only talking about a single asic here... about 400 watts max per asic(300 according to KNC)
it can be done with H60's.     How many watts of you think that cooling tower is capable of? It's already pushed it's spec limit.
Surely even an H60 will be superior to that bulky archaic arctic tower heatsink.

 Whoa! 2500 watts would suffice Wink

Don't let sidehack fade away...【ツ】Buy him a burger!   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
Phoenix1969
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July 03, 2014, 08:23:10 PM
 #36430

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

If someone can mount an Corsair H80 on the chip and mount a push/pull fan configuration right on the side of the box you can literally bring the size of that box down to a small shoe box size. I've been using that Corsair H80 on my overclocked Intel 3930K processor for a while now and works great. It is a completely sealed system and keeps the processor cool at all times. If there is a will, there would be a way. The ASIC chips are larger in size, so making it work would take a good DIY'er.



 Do you know how much heat the H80 can remove?  I think those ASICs are about three times the power draw of your 3930k... it probably wont be enough.

That depends on the speed of your fan, and ambient temps; but it can dissipate up to about 2500 watts according to a Corsair support specialist, but he couldn't give me solid figures although I think that's a lofty estimate we don't need nearly that.
theres the H-100 as well, but were only talking about a single asic here... about 150-200 watts max per asic (300 watts total draw for the entire cube according to KNC) found here: https://www.kncminer.com/news/news-96 The asic alone may be half that maximum(an estimation)
It can be done with H60's.     How many watts of you think that cooling tower is capable of? It's already pushing it's spec limit in warmer climates.
Surely even an H60 will be far superior to that bulky archaic arctic tower heatsink.

 Whoa! 2500 watts would suffice Wink

even if he had said 2 to 500   its better imho


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tolip_wen
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July 03, 2014, 08:52:59 PM
 #36431

Whilst on the subject of waterblocks.

My water loop is running Smiley
(not installed yet)
No leaks!
Might burp it once more but then it's time to take the plunge.

My goal is <15 minute pit stop per cube.


YMMV
Smiley

Pics of 4kW single rail, water cooled nep to follow in a few hours if all goes well.

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My sub 1337 vanity address Wink
Phoenix1969
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July 03, 2014, 10:06:19 PM
 #36432

Whilst on the subject of waterblocks.

My water loop is running Smiley
(not installed yet)
No leaks!
Might burp it once more but then it's time to take the plunge.

My goal is <15 minute pit stop per cube.


YMMV
Smiley

Pics of 4kW single rail, water cooled nep to follow in a few hours if all goes well.

You are the man! Can't wait to see what you're up to hehe
any firmware tweaks you recommend are always welcome too!


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July 03, 2014, 10:08:06 PM
 #36433

Good to see people getting into the Neptunes just like the Jupiter..

Although I think watercooling is great the way the Neptune is put together and the heat one must dissipate means an i30 with a decent fan provides plenty of heat dissipation.. The VRM and temps on the bottom of the board are two of the most concerning and really the place one needs to focus to keep things under control.

I have built over 30 1Th/s 4 board Jupiters so far (6 boards all run 1.5Th/s) and raising the boards a little and swapping out the fan for a fairly low pressure high CFM fan (keeps the noise down with a low pressure fan) is enough to keep air moving quick enough to keep them where they need to be..

On the Neptune side I haven't put my thermal camera on the boards yet since I don't have one but based on the layout it's a similar problem..

The biggest challenge I've seen is the VRM shutdown, with a hardcoded 48A shutdown I don't know how to push past that but I have replaced VRMs on the Jupiters so I might do it on the Neptune and see what happens, if I get one at some point..

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July 03, 2014, 10:09:49 PM
 #36434

Good to see people getting into the Neptunes just like the Jupiter..

Although I think watercooling is great the way the Neptune is put together and the heat one must dissipate means an i30 with a decent fan provides plenty of heat dissipation.. The VRM and temps on the bottom of the board are two of the most concerning and really the place one needs to focus to keep things under control.

I have built over 30 1Th/s 4 board Jupiters so far (6 boards all run 1.5Th/s) and raising the boards a little and swapping out the fan for a fairly low pressure high CFM fan (keeps the noise down with a low pressure fan) is enough to keep air moving quick enough to keep them where they need to be..

On the Neptune side I haven't put my thermal camera on the boards yet since I don't have one but based on the layout it's a similar problem..

The biggest challenge I've seen is the VRM shutdown, with a hardcoded 48A shutdown I don't know how to push past that but I have replaced VRMs on the Jupiters so I might do it on the Neptune and see what happens, if I get one at some point..

Yes!
The idea was if we get the big ass cooling tower, bar, and blanket out of the way, we may be able to cool those VRM's and the entire board a bit better.... what ya think?


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padrino
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July 03, 2014, 10:19:18 PM
 #36435

Yes!
The idea was if we get the big ass cooling tower, bar, and blanket out of the way, we may be able to cool those VRM's a bit better.... what ya think?

I agree.. Since they sheered the aluminum the blankets are going to vary based on the unit, some will work much better than others.. I would like to try replacing the current setup with the same type of bracket on the old Neptunes, possibly some small VRM heatsinks (with 48A the heat dissipation is pretty insane) and a higher CFM fan.. I suspect that will be the easiest option that provides plenty of heat dissipation..

I'm most interested in swapping out the VRMs for the 50A version, I suspect they can really be pushed if that jump is taken... While on the Nov we can drive the VRMs much higher they still don't hit the 48A hard shutdown, in the Neptune the stock config is within a few percent of 48A..

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Phoenix1969
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July 03, 2014, 10:40:58 PM
 #36436

Yes!
The idea was if we get the big ass cooling tower, bar, and blanket out of the way, we may be able to cool those VRM's a bit better.... what ya think?

I agree.. Since they sheered the aluminum the blankets are going to vary based on the unit, some will work much better than others.. I would like to try replacing the current setup with the same type of bracket on the old Neptunes, possibly some small VRM heatsinks (with 48A the heat dissipation is pretty insane) and a higher CFM fan.. I suspect that will be the easiest option that provides plenty of heat dissipation..

I'm most interested in swapping out the VRMs for the 50A version, I suspect they can really be pushed if that jump is taken... While on the Nov we can drive the VRMs much higher they still don't hit the 48A hard shutdown, in the Neptune the stock config is within a few percent of 48A..
Ah yes.  The old Jupiter bar would be great, but that would also mean losing the box totally because the holes are on the wrong sides (in previous posts). No problem there really.
The ericcsons they are using in Neptune are auto-shutting down at 48a?... and pushed within a couple amps?. Damn.
Theres gotta be a cheaper way than buying 8 new vrms for every pcb....
Hmm...  well...  we will soon see exactly what those limits are if Tolip has anything to say about it...hehe


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padrino
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July 03, 2014, 10:57:28 PM
 #36437

Yes!
The idea was if we get the big ass cooling tower, bar, and blanket out of the way, we may be able to cool those VRM's a bit better.... what ya think?

I agree.. Since they sheered the aluminum the blankets are going to vary based on the unit, some will work much better than others.. I would like to try replacing the current setup with the same type of bracket on the old Neptunes, possibly some small VRM heatsinks (with 48A the heat dissipation is pretty insane) and a higher CFM fan.. I suspect that will be the easiest option that provides plenty of heat dissipation..

I'm most interested in swapping out the VRMs for the 50A version, I suspect they can really be pushed if that jump is taken... While on the Nov we can drive the VRMs much higher they still don't hit the 48A hard shutdown, in the Neptune the stock config is within a few percent of 48A..
Ah yes.  The old Jupiter bar would be great, but that would also mean losing the box totally because the holes are on the wrong sides (in previous posts). No problem there really.
The ericcsons they are using in Neptune are auto-shutting down at 48a?... and pushed within a couple amps?. Damn.
Theres gotta be a cheaper way than buying 8 new vrms for every pcb....
Hmm...  well...  we will soon see exactly what those limits are if Tolip has anything to say about it...hehe

I'm not sure how hard the limit is enforced but per the datasheet for the VRM it cannot be raised past 48A and the VRM is supposed to shutdown at that number..

I hope it's soft enough that they allow maybe 50A before a hard kill but some testing will tell..

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crashoveride54902
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July 04, 2014, 12:37:51 AM
 #36438

Yes!
The idea was if we get the big ass cooling tower, bar, and blanket out of the way, we may be able to cool those VRM's a bit better.... what ya think?

I agree.. Since they sheered the aluminum the blankets are going to vary based on the unit, some will work much better than others.. I would like to try replacing the current setup with the same type of bracket on the old Neptunes, possibly some small VRM heatsinks (with 48A the heat dissipation is pretty insane) and a higher CFM fan.. I suspect that will be the easiest option that provides plenty of heat dissipation..

I'm most interested in swapping out the VRMs for the 50A version, I suspect they can really be pushed if that jump is taken... While on the Nov we can drive the VRMs much higher they still don't hit the 48A hard shutdown, in the Neptune the stock config is within a few percent of 48A..
Ah yes.  The old Jupiter bar would be great, but that would also mean losing the box totally because the holes are on the wrong sides (in previous posts). No problem there really.
The ericcsons they are using in Neptune are auto-shutting down at 48a?... and pushed within a couple amps?. Damn.
Theres gotta be a cheaper way than buying 8 new vrms for every pcb....
Hmm...  well...  we will soon see exactly what those limits are if Tolip has anything to say about it...hehe

I'm not sure how hard the limit is enforced but per the datasheet for the VRM it cannot be raised past 48A and the VRM is supposed to shutdown at that number..

I hope it's soft enough that they allow maybe 50A before a hard kill but some testing will tell..

check out the thread pictures of your mining rigs...guy put a neppy board in that novac stuff...with volts -0,073 and 500mhz clock vrms were at max 52a-50a and a cool 60c Smiley but he said if he pushed farther it would shut down Sad so idk if much above 500mhz is possible with these vrms...good luck guys

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July 04, 2014, 12:53:46 AM
 #36439

I can see why jelin was so frustrated with the AX1200i. It won't even power one Neptune module plus controller... the Over Current Protection (OCP) kicks in and the PSU shuts down.

As annoying as this is, it is a safety feature as it would normally be unusual to draw that much current through a single PCIe cable. So i blame KnC for not putting two PCIe jacks on each module, rather than Corsair for their smart PSU. Bitmain put two PCIe jacks on each S3 blade, but it turns out only one is needed. That's a forward thinking design (in case the BM1382 28nm chip needed the power) - KnC take note.

Corsair link software lets you increase the OCP limit which fixes the problem... BUT the link cable is designed to plug into a motherboard USB pin header, not into a USB port (which makes sense as the PSU is designed to be inside a PC). Damn, I've only got a laptop.

I've got 2-to-1 PCIe cables ordered from Cablez, hopefully they will spread the Amps between two ports on the PSU and get around the OCP.

I'm also trying to source an EVGA 1300W superNOVA G2, but no luck yet finding one in New Zealand.

So my Neptune has been delivered, visually looks ok, but I can't power it on yet.
Does anyone have another PSU recommendation?  At this stage I can't source EVGA 1300W superNOVA G2 in New Zealand.

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July 04, 2014, 12:54:32 AM
 #36440

I can see why jelin was so frustrated with the AX1200i. It won't even power one Neptune module plus controller... the Over Current Protection (OCP) kicks in and the PSU shuts down.


Just FYI,  the AX1200 (no i) works great,  if you have one of those around.  I think other folks have pushed the OCP way up on the iand had luck with that, also.
Thanks - I'll look for that.

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