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Author Topic: HashFast announces specs for new ASIC: 400GH/s  (Read 875470 times)
minternj
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December 16, 2013, 03:26:21 AM
 #4261

So... Does anyone have experience with water based coolers like those that are being used?

Are they loud?  Do you guys think they will be as loud as the avalon's?
I am currently very happy with my fanless bitfury setup.


The water pump is pretty much silent. The fans that move air past the radiators are what will make noise. You can always swap them out for quieter fans. Without knowing what model fans this system comes with we wont know how loud they are. It really should be a very quiet system though.

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December 16, 2013, 03:38:28 AM
 #4262

So... Does anyone have experience with water based coolers like those that are being used?

Are they loud?  Do you guys think they will be as loud as the avalon's?
I am currently very happy with my fanless bitfury setup.


The water pump is pretty much silent. The fans that move air past the radiators are what will make noise. You can always swap them out for quieter fans. Without knowing what model fans this system comes with we wont know how loud they are. It really should be a very quiet system though.

if its anything like the typical pc installation the fans will be temperature sensitive and spin faster when its hot and go slower (and quieter) when its not hot.   since its likely that most people will want it to overclock to the max, and run very hot i think its safe to assume the fans are going to be spinning pretty fast all of the time.  but if the noise is really a problem you can always under clock it and have a quieter but less profitable system.  (no one's going to seriously do that are they?)

the only reason you can run your bitfury's without a fan is because they're not running that fast, or your ambient air is very cool.

you could always switch out the fans they give you with quieter ones, but they probably won't perform as well so you'd almost certainly be crippling the performance if you do that.  you make a choice, fastest possible, whatever the noise... or, low noise and lower performance.

im not expecting either hashfast nor cointerra systems to be as quiet as knc systems.. simply because the amount of watts of heat that needs to be dissipated is a lot more... that said, i suspect they're still quieter than avalons.

in noise per gigahash i am expecting both the hashfast and cointerra systems to be very efficient (considering their performance).  but in absolute terms, they probably won't be silent!   cointerra's has a larger radiator (almost the full size of the rear) so that may give them an edge in not needing as fast a fan speed, but until we see both systems running... and hear them... we won't know.

and anyway, both these systems deserve to be run in a data center!


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December 16, 2013, 03:47:04 AM
 #4263

that said, i suspect they're still quieter than avalons.

A god damn freight train is quieter than my neighbours B1 Avalon.  LOL
minternj
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December 16, 2013, 03:57:54 AM
 #4264

that said, i suspect they're still quieter than avalons.

A god damn freight train is quieter than my neighbours B1 Avalon.  LOL

if an avalon is a freight train, then BFL single must be a boeing 787

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December 16, 2013, 04:01:40 AM
 #4265

that said, i suspect they're still quieter than avalons.

A god damn freight train is quieter than my neighbours B1 Avalon.  LOL

if an avalon is a freight train, then BFL single must be a boeing 787

plasticky toilet door handles?   batteries always up in flames?   spends a lot of time in maintenance?

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December 16, 2013, 04:12:38 AM
 #4266

that said, i suspect they're still quieter than avalons.

A god damn freight train is quieter than my neighbours B1 Avalon.  LOL

if an avalon is a freight train, then BFL single must be a boeing 787
A gross exaggeration on the Avalon B1 unit noise.

You can very easily hold a quiet conversation next to one without issue as long as the temperature is below 85F.

The BFL units though (as many of you will testify) is a different beast. It runs pretty damn hot with it's case on. That is why almost everyone removes the housing and changes the fan as if it were "an unnecessary accessory".

While I can run my Avalon B1 (70~85GH/s) at below 50C with fan at 2k RPM. It doesn't really get hot or ramp up the Fans until the temp rises above 95F.

A BFL unit is a hit or miss (more often a miss IMO). Some are cool and work fine with the case on at 35C. Others (better than 50% IMO) are overheating and throttling on a constant basis. Necessitating the removal of the cover to get it under 80C.

The latest fun trend is for the chips (and their apparent cores) is to fail and then necessitating an RMA request. A costly trip back to BFL HQ for a good chuck in the trash bin. Assuming the custom BFL power supply doesn't spark and arc before killing the units attached to it.
 


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minternj
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December 16, 2013, 04:13:04 AM
 #4267

that said, i suspect they're still quieter than avalons.

A god damn freight train is quieter than my neighbours B1 Avalon.  LOL

if an avalon is a freight train, then BFL single must be a boeing 787

plasticky toilet door handles?   batteries always up in flames?   spends a lot of time in maintenance?



Was thinking more like production delays.

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December 16, 2013, 04:46:08 AM
 #4268

Now can you please provide data for the maximum 24/7 safe current per 18AWG wire.
My own research led me to believe it is much lower than 9A.

It depends on the length of the wire, and the acceptable voltage drop.

At 3 ft circuit legnth, 18 AWG is good for 9A with a 2.83% voltage drop.  As for safe, at 2.83% voltage drop that would only 1.5W dissipated as heat.  Still the point was somewhat academic I doubt HF will be pushing anywhere close to that much current but if they did the limiting factor wouldn't be the artificial PCIe graphics standard for 6 and 8 pin connectors.

KNC is what, 800W for 4 boards, or 200W per board, but they are using 20AWG wire, which adds up to 18" of 20AWG to the PSU cable length. Removing teh KNC wire and plugging the PSU cables right in added about .1V to the VRMs

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December 16, 2013, 07:46:31 AM
 #4269

Well the way that hashfast_cl has been posting in here, you'd think they are pretty much done. But yes i also think they took the weekend off, probably because their pcb assembly house Sonic manufacturing doesnt work weekends. I think the Australia team is out surfing or hunting great whites too.

If its sunday in the states its monday in Aus Smiley


So... Does anyone have experience with water based coolers like those that are being used?

Are they loud?  Do you guys think they will be as loud as the avalon's?
I am currently very happy with my fanless bitfury setup.

Since it looks like ill void my warranty by running the unit in Australia.

Im going to rip out that Pos baby water cooling unit a putting in a bigger one. D5 vario pump, 60mm thick RX 240 series XSPC rad with corsair SP 120 fans

MT GOX, WE.exchange (WE.Scam), BFL (Brutally Fkn Last), Hashfast (ScamFast), IceDrill (Licedrill),
No wonder the governments don't like Bitcoin with all these parasites
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December 16, 2013, 10:01:17 AM
 #4270

Well the way that hashfast_cl has been posting in here, you'd think they are pretty much done. But yes i also think they took the weekend off, probably because their pcb assembly house Sonic manufacturing doesnt work weekends. I think the Australia team is out surfing or hunting great whites too.

If its sunday in the states its monday in Aus Smiley


So... Does anyone have experience with water based coolers like those that are being used?

Are they loud?  Do you guys think they will be as loud as the avalon's?
I am currently very happy with my fanless bitfury setup.

Since it looks like ill void my warranty by running the unit in Australia.

Im going to rip out that Pos baby water cooling unit a putting in a bigger one. D5 vario pump, 60mm thick RX 240 series XSPC rad with corsair SP 120 fans
and how would you void your warranty in Australia? Different power from the socket?

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December 16, 2013, 11:53:35 AM
 #4271

Well the way that hashfast_cl has been posting in here, you'd think they are pretty much done. But yes i also think they took the weekend off, probably because their pcb assembly house Sonic manufacturing doesnt work weekends. I think the Australia team is out surfing or hunting great whites too.

If its sunday in the states its monday in Aus Smiley


So... Does anyone have experience with water based coolers like those that are being used?

Are they loud?  Do you guys think they will be as loud as the avalon's?
I am currently very happy with my fanless bitfury setup.

Since it looks like ill void my warranty by running the unit in Australia.

Im going to rip out that Pos baby water cooling unit a putting in a bigger one. D5 vario pump, 60mm thick RX 240 series XSPC rad with corsair SP 120 fans
and how would you void your warranty in Australia? Different power from the socket?

Somewhere previous in the thread and hasfast's tos "operation in an ambient temperature other than 5-22 degrees Celsius (40-72 degrees  Fahrenheit)" warranty is voided.
In my little corner of Aus today it was 34c (93.2F) topping out latter this week at 41c (105.8F) normal Aussie summer

240v standard house socket over here.

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December 16, 2013, 12:39:35 PM
 #4272

Now can you please provide data for the maximum 24/7 safe current per 18AWG wire.
My own research led me to believe it is much lower than 9A.

Useful table here

http://www.powerstream.com/Wire_Size.htm

using "The Maximum Amps for Chassis Wiring is also a conservative rating, but is meant for wiring in air, and not in a bundle."

AWG 18 is okay up to 16A  (~<200W @ 12V)
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December 16, 2013, 01:25:30 PM
 #4273

Now can you please provide data for the maximum 24/7 safe current per 18AWG wire.
My own research led me to believe it is much lower than 9A.

Useful table here

http://www.powerstream.com/Wire_Size.htm

using "The Maximum Amps for Chassis Wiring is also a conservative rating, but is meant for wiring in air, and not in a bundle."

AWG 18 is okay up to 16A  (~<200W @ 12V)


I highly doubt that you can run 550W through the PCI-E cable without any consequences.
One of my PSUs (Cooler Master V850) is powering an October Jupiter and each module is being fed by a different PCI-E cable and still they get noticeably hot (around 44 degrees max).
Or try to connect 2 modules per PCI-E cable and it gets even hotter, yet the current per strand is only around 8-9A.

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December 16, 2013, 01:54:26 PM
 #4274

I highly doubt that you can run 550W through the PCI-E cable without any consequences.
Correct me if i'm wrong, i'm not really following this wire debate, but there are 2 PCI-E slots on each board, so each PCI-E cable should be able to provide around 300W.
I don't see a problem with that.

My anger against what is wrong in the Bitcoin community is productive:
Bitcointa.lk - Replace "Bitcointalk.org" with "Bitcointa.lk" in this url to see how this page looks like on a proper forum (Announcement Thread)
Hashfast.org - Wiki for screwed customers
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December 16, 2013, 01:57:34 PM
 #4275

2x 6-pin PCIe cables are used to power my Bitfury M board.  A few people have had their's go up in flames when using between 500-600w.  The three 12V molex contacts on the 6-pin connector themselves are good for 300W or so all combined, so long as your PSU manufacturer doesn't cheap out on them and use a smaller gauge than spec (which seems to happen on occasion).

It shouldn't be a problem if we're all getting seasonic psus.

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December 16, 2013, 02:16:12 PM
 #4276

I highly doubt that you can run 550W through the PCI-E cable without any consequences.
Correct me if i'm wrong, i'm not really following this wire debate, but there are 2 PCI-E slots on each board, so each PCI-E cable should be able to provide around 300W.
I don't see a problem with that.

The discussion was about the general characteristics of 18AWG wire and not specifically for the Hashfast board.
Still 300W per one PCI-E cable with 3x 12V lines is pushing it to the limit according to my experience - the cable gets quite hot.
For example KNC specifically says that: You need to have 1 PCI-E cable for each asic card.

2x 6-pin PCIe cables are used to power my Bitfury M board.  A few people have had their's go up in flames when using between 500-600w.  The three 12V molex contacts on the 6-pin connector themselves are good for 300W or so all combined, so long as your PSU manufacturer doesn't cheap out on them and use a smaller gauge than spec (which seems to happen on occasion).

It shouldn't be a problem if we're all getting seasonic psus.

Most probably it would be OK for the long term with a good quality PSU, still I prefer to limit the current on a single 18AWG strand to 6A = 18A for a single cale.

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December 16, 2013, 05:46:35 PM
 #4277

Anyone got any luck having a reply from them lately?

I'm asking legitimate questions, such as
"the invoice you sent me includes a control unit (sierra), will you send it for real or do i have to buy it myself?"
"will you send USB cables and hubs along with the control unit?"

Makes me wonder...

(and btw, their telephone number doesn't work anymore).

My anger against what is wrong in the Bitcoin community is productive:
Bitcointa.lk - Replace "Bitcointalk.org" with "Bitcointa.lk" in this url to see how this page looks like on a proper forum (Announcement Thread)
Hashfast.org - Wiki for screwed customers
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December 16, 2013, 06:34:33 PM
 #4278

Anyone got any luck having a reply from them lately?

I'm asking legitimate questions, such as
"the invoice you sent me includes a control unit (sierra), will you send it for real or do i have to buy it myself?"
"will you send USB cables and hubs along with the control unit?"

Makes me wonder...

(and btw, their telephone number doesn't work anymore).

Maybe you got banned BFL style!

iCEBREAKER is a troll! He and cypherdoc helped HashFast scam 50 Million $ from its customers !
H/w Hosting Directory & Reputation - https://bitcointalk.org/index.php?topic=622998.0
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December 16, 2013, 06:35:50 PM
 #4279

Yes, probably.
Another point in my favour for my lawyer... But i recall another user complaining of the lack of answers a few days ago, this is why i asked here...

My anger against what is wrong in the Bitcoin community is productive:
Bitcointa.lk - Replace "Bitcointalk.org" with "Bitcointa.lk" in this url to see how this page looks like on a proper forum (Announcement Thread)
Hashfast.org - Wiki for screwed customers
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December 16, 2013, 08:16:24 PM
 #4280

Anyone got any luck having a reply from them lately?

I'm asking legitimate questions, such as
"the invoice you sent me includes a control unit (sierra), will you send it for real or do i have to buy it myself?"
"will you send USB cables and hubs along with the control unit?"

Makes me wonder...

(and btw, their telephone number doesn't work anymore).
yup... BFL STYLE ....    Shocked
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