[ANN] Technobit HEX8A1 -240 GHs Coincraft A1 board- Finished production

[Gator-hex]

Would bigger aluminium block help? Is it hot at on edges?

a bigger block would really help, but technobit wast too stingy to put a bigger one on it  

It's really tall already, but if it could be wider, 120 or 140mm wide, you could use larger fans that have more CFM but less noise than a 92mm fan.

I don't like the bottom heatsink being in a different direction to the top. I'd rather it was running the same direction as the top one, then you could put a big fan on one end and blow air down both the heatsinks and put it in a tunnel. It looks a lot of hassle to manufacture the bottom heatsink, the way they made it, with lots of cut outs.

I'm sure Marto thought it was best to deliver 260GH, noise dB(A) wasn't mentioned in the purchase contract, but GH was!  

[Zich]

Yeah I want to run this with less volts like they do 850mV should make it 200GH/200W so I get less heat and can put quieter fans on.
But I think Zich said he got like 23% error rate!  
If I swap with someone with a later batch Feb/Mar will they be more efficient or the same?

Some test result  

With 220 & 880mV, ampere usage on 12V rail is 20A  





Then 200 & 870mV, ampere usage on 12V rail is 17 A. hardware error is very low 

[Gator-hex]

Yeah I want to run this with less volts like they do 850mV should make it 200GH/200W so I get less heat and can put quieter fans on.
But I think Zich said he got like 23% error rate!  
If I swap with someone with a later batch Feb/Mar will they be more efficient or the same?

Some test result  

With 220 & 880mV, ampere usage on 12V rail is 20A  





Then 200 & 870mV, ampere usage on 12V rail is 17 A. hardware error is very low  

Cool. Thanks for testing that.
I think Bitmine were using 830mV in their video. http://www.youtube.com/watch?v=91MuwGOgRFo

[Zich]

Cool. Thanks for testing that.
I think Bitmine were using 830mV in their video. http://www.youtube.com/watch?v=91MuwGOgRFo

No problem 
But i am not sure about their setting. The cgminer only show 8/256

[Gator-hex]

Cool. Thanks for testing that.
I think Bitmine were using 830mV in their video. http://www.youtube.com/watch?v=91MuwGOgRFo

No problem  
But i am not sure about their setting. The cgminer only show 8/256

At 0:47, watch in 720p full screen, and you can see SYS_CLOCK=830MHz

But 17A/204W is awesome. I'll be happy with that! That's close to 1GH/W

[Zich]

Cool. Thanks for testing that.
I think Bitmine were using 830mV in their video. http://www.youtube.com/watch?v=91MuwGOgRFo

No problem  
But i am not sure about their setting. The cgminer only show 8/256

At 0:47, watch in 720p full screen, and you can see SYS_CLOCK=830MHz

But 17A/204W is awesome. I'll be happy with that! That's close to 1GH/W

And i touch the heatsink, it's only warm with 4900 fan  

830MHz mean around 212 on our setting

[loshia]

Cool. Thanks for testing that.
I think Bitmine were using 830mV in their video. http://www.youtube.com/watch?v=91MuwGOgRFo

No problem  
But i am not sure about their setting. The cgminer only show 8/256

At 0:47, watch in 720p full screen, and you can see SYS_CLOCK=830MHz

But 17A/204W is awesome. I'll be happy with that! That's close to 1GH/W

Yeah heve in mind that a few amps are for the powerful fans which you gonna replace. You are getting there:)

[Zich]

Guess everyone busy with their new toys right now 

[dspbuy]

Guess everyone busy with their new toys right now 

I wish I was, but Marto never sent me mine, and now he won't even talk to me.

[gcube1305]

700W 80+ PSU ... checked
TL-MR3020 ... checked
Router patched with latest firmware ... checked
USB power-protected hub ... checked
Fan protection for cat's nose ... checked
HEXA81 board ... che ... Wait wait!!
...
Houston, we have a problem.

Martin, please, where is my board ? Order EJYKOZQDX, still "Preparation in progress"... Can i have the shipping number please ?

[Gator-hex]

Ok bought a 730W Thermatake as a temp PSU had 4x PCI-E. It's not enough to run 2x Hex8A1 on defaults clocks! Not 1GH/W @ 260GH!

Hex8A1 #1 (Good Girl) Default Clock/Volt 245GH 368W at the wall.


Hex8A1 #2 (Bad Boy) Default Clock/Volt 248GH 408W at the wall. 40W more!


Total = 493GH @ 776W
0.63GH/W or 1.57W/GH that's very similar GH/W to the Hex16B except they're not as quiet!

Right I'm gonna dial the clocks down and see if I can get close to 1GH/1W somewhere so I can run both on the same PSU.  

Then I'm gonna try and make them quiet!

[marto74]

Hi
All
This weekend we are off
Will be back in monday

[loshia]

Ok bought a 730W Thermatake as a temp PSU had 4x PCI-E..... it's not enough to run 2x Hex8A1 on defaults clocks!

Hex8A1 #1 Default Clock/Volt 245GH 368W at the wall.


Hex8A1 #2 Default Clock/Volt 248GH 408W at the wall.


Total = 493GH @ 776W
0.63GH/W or 1.57W/GH that's very similar GH/W to the Hex16B except they're quiet!

Right I'm gonna dial the clocks down and see if I can get close to 1GH/1W somewhere so I can run both on the same PSU.  

Then I'm gonna try and make them quiet!

Nice pics gator.  The diff-to-one is 0 which is a wise move having in mind other boards connected

[Gator-hex]

Ok bought a 730W Thermatake as a temp PSU had 4x PCI-E..... it's not enough to run 2x Hex8A1 on defaults clocks!

Hex8A1 #1 Default Clock/Volt 245GH 368W at the wall.


Hex8A1 #2 Default Clock/Volt 248GH 408W at the wall.


Total = 493GH @ 776W
0.63GH/W or 1.57W/GH that's very similar GH/W to the Hex16B except they're quiet!

Right I'm gonna dial the clocks down and see if I can get close to 1GH/1W somewhere so I can run both on the same PSU.  

Then I'm gonna try and make them quiet!

Nice pics gator.  The diff-to-one is 0 which is a wise move having in mind other boards connected

Okay this is the result of underclocking to 200/870 both running on the same PSU now...


384.9GH for 434W measured at the wall.
0.89GH/W or 1.12W/GH

One board is a fair bit weaker than the other. One is slightly warmer and they have different capacitors, although all flat ones.

Time to try the quiet fans, I'm getting a headache!  

[Pug]

-

[loshia]

Gator,
While tweaking the boards use diff to one 1 . With dif to one 0 you need at least day for stats to settle
Then you can which board is better

[Gator-hex]

Gator,
While tweaking the boards use diff to one 1 . With dif to one 0 you need at least day for stats to settle
Then you can which board is better

How u change it? I'm in no rush though, I run it until they stabilize. 

[loshia]

Gator,
While tweaking the boards use diff to one 1 . With dif to one 0 you need at least day for stats to settle
Then you can which board is better

How u change it? I'm in no rush though, I run it until they stabilize. 

In to link web it is called set asic difficulty or something like that for hex8 boards. Default is 0 change this to 1

[Gator-hex]

One of my Hex8A1 miners has a habit of crashing then it's really difficult to bring it back up.
I suspect it don't like running at 220/880 or any other low voltage.
It takes out both miners and the PSU. It could be the PSU I guess but they are running < 250W each and it's single rail 684W so something wierd going on.
Any tips? I'm guessing more volts less clock? But why should the fact it crashed make it hard to get booted again?
I thought it was dead, but it came back once, and now it's dead again.


Rebooted and only one miner comes back. Fans spin but heatsink stays cold.
Is it broken? Why does CGminer say 800mV when it should say 880mV? Could it be a software bug?
I've never had a miner act like this before. Help!

So I reset default 260/1000 rebooted again and now both Hex8A1 are MIA!
Fans are spinning, one board shows green+green light, the other show green+amber light.
Maybe I'm just asking too much from the PSU here, so lets try a lower volt again.


Ok so I try 200/900 and reboot again. The green+green light one starts hashing. Although it doesn't flash the lights like the Hex16B do.
It's all so random!


So I unplug the bad one and CGminer detects that, not mining seems to be a different state than not connected/powered.
Sadly when I plug it back in it still refuses to mine with it.

[iongchun]

Thanks for the delivery, Marto.
The fans are really noisy, I replace them with low CFM and quiet ones,
and run the HEX8A1 with only 175 in frequency and 870 in voltage parameter.

When connected to Linux machine, lsusb will show:
Bus 001 Device 017: ID 04d8:000a Microchip Technology, Inc. CDC RS-232 Emulation Demo

And it appears as a tty device:
crw-rw---- 1 root dialout 166, 1 2g  16 08:51 /dev/ttyACM2

Showed in dmesg:
[  161.103406] cdc_acm 1-1.1:1.0: This device cannot do calls on its own. It is not a modem.
[  161.103442] cdc_acm 1-1.1:1.0: ttyACM2: USB ACM device

Running with cgminer:

Code:

 cgminer version 3.12.3 - Started: [2014-02-15 21:11:05]
------------------------------------------------------------------------------------------
 (5s):151.1G (avg):175.5Gh/s | A:1696768  R:28928  HW:64  WU:38.3/m
 ST: 2  SS: 0  NB: 99  LW: 1891862  GF: 0  RF: 0
 Connected to 10.0.0.254 diff 64 with stratum as user 1X.....
 Block: 168ab84a...  Diff:2.62G  Started: [08:53:52]  Best share: 1.86M
------------------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 HEX8 0: 175  870/ 872mV | 173.9G/175.5Gh/s | A:1696448 R:28928 HW:64/0.24% WU:38.3/m
------------------------------------------------------------------------------------------

While I also run bfgminer with other mining hardware, it seems bfgminer could cause the OS to hang when it probe the tty device.
This can be avoided with run HEX8A1's cgminer first (so the tty device would disappear), or plug the HEX8A1 after bfgminer runs.

Oh, and it runs well with p2pool, with less than 2% DOA, compared to 5~6% DOA for BFL or BitFury devices.