High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com - page 103.

matthewh3

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Quote from: stcupp on May 20, 2012, 11:03:39 AM

Quote from: matthewh3 on May 20, 2012, 10:08:42 AM

Will these boards be compatible with "eldentyrell" new 250MH/s bitstream for the Sparten6? If so this will take the boards to 1GH/s will the heatsinks/fans be sufficient?

I can't really give you a answer as eldentyrell hasn't given any numbers on power consumption yet..... However the power converter is made for 40 Amps but will go up to 70 before it enters "Hiccup mode". You could probably run it at 50-60 Amps pretty safely and I really doubt you would need more than that. Going past the 40 Amp mark would probably also require that the power converter gets lots of airflow so it doesn't overheat.

As a comparison ZTEX uses 8A per FPGA which would be 32A for 4
This is just a guess but I think the new bitstream will use around 10A - 12A per FPGA

A nice thing about this board design is if the board cant supply enough power for 4 FPGA's on the new bitstream you could always just unplug one of the FPGAs. Another option is new backplanes with larger power converters could be made and you could just plug your FPGAs into the new backplane.

So as long as it's at or under 40A all the Sparten6's should hash at 250MH/s each taking the boards to 1GH/s each. Or if it needs to much power just use three of the Sparten6 modules per board at 750MH/s.

stcupp

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Quote from: matthewh3 on May 20, 2012, 10:08:42 AM

Will these boards be compatible with "eldentyrell" new 250MH/s bitstream for the Sparten6? If so this will take the boards to 1GH/s will the heatsinks/fans be sufficient?

I can't really give you a answer as eldentyrell hasn't given any numbers on power consumption yet..... However the power converter is made for 40 Amps but will go up to 70 before it enters "Hiccup mode". You could probably run it at 50-60 Amps pretty safely and I really doubt you would need more than that. Going past the 40 Amp mark would probably also require that the power converter gets lots of airflow so it doesn't overheat.

As a comparison ZTEX uses 8A per FPGA which would be 32A for 4
This is just a guess but I think the new bitstream will use around 10A - 12A per FPGA

A nice thing about this board design is if the board cant supply enough power for 4 FPGA's on the new bitstream you could always just unplug one of the FPGAs. Another option is new backplanes with larger power converters could be made and you could just plug your FPGAs into the new backplane.

matthewh3

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Will these boards be compatible with "eldentyrell" new 250MH/s bitstream for the Sparten6? If so this will take the boards to 1GH/s will the heatsinks/fans be sufficient?

stcupp

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Quote from: nandika on May 20, 2012, 01:05:27 AM

what do you say about these coolers?
Are they too small to cool these fpgas?

By the way, just ordered one to test it...

http://www.ebay.com/itm/Copper-NorthBridge-Cooler-Cooling-Fan-Heatsink-/260922590702
http://www.ebay.com/itm/55mm-North-Bridge-Chipset-Cooler-Fan-55mm-302-/120905209496

On first look my only concerns are the first one I'm not sure what the exact dimensions are with the fan and without..... A lot of these coolers are unclear about this. you may have to take the fan off and put it beside the board blowing on the heatsink to get more cards in.
Oh and no they shouldn't be too small to cool a FPGA

Quote from: TheSeven on May 20, 2012, 01:43:42 AM

Hm, they looks like they only have a small contact area in the middle? That might be a problem...

The first one does look like it has a small contact area in the middle. Should be fine though as long as it covers the whole chip. The second one just looks like theres a square of thermal paste from previous use.

Everyones been asking for more pictures I'm sorry I can't provide some real pictures of the REV4 just yet as were still waiting on getting them from the manufacturer.... but I've got some 3D renders..... I'll post up some pics of my REV3 board in a bit also. Theres only a few small changes between REV3 and REV4.

TheSeven

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Hm, they looks like they only have a small contact area in the middle? That might be a problem...

nandika

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what do you say about these coolers?
Are they too small to cool these fpgas?

By the way, just ordered one to test it...

http://www.ebay.com/itm/Copper-NorthBridge-Cooler-Cooling-Fan-Heatsink-/260922590702
http://www.ebay.com/itm/55mm-North-Bridge-Chipset-Cooler-Fan-55mm-302-/120905209496

matthewh3

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Quote from: Tyger on May 19, 2012, 04:23:32 AM

anyone buyed one of these yet?

Yes people have paid for them and the first major shipment is hopefully going to happen towards the end of next week.

Tyger

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anyone buyed one of these yet?

TheSeven

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Both cgminer and MPBM run on both Linux and Windows.

The screenshot on their website shows MPBM, but some more recent posts in this thread suggest that they're moving to cgminer.

Tyger

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I saw a linux miner, but is there a windows version too?

DiabloD3

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Quote from: stcupp on May 14, 2012, 08:05:27 PM

Quote from: DiabloD3 on May 14, 2012, 05:43:10 PM

It'd be nice if you could find a heatpipe-type solution so people can put quieter cooling on their rigs.

Also, the URL in your sig is 404.

The main problem in this design for cooling is the amount of space between each fpga card.... You may be able to find a small waterblock something like this:

img

Quote from: GenTarkin on May 14, 2012, 06:14:27 PM

So, that mean passive heatsinks wont cool enough? cuz those little fans really REALLY suck, they die nearly instantly LOL...

It all depends on what speed you run the FPGAs.... even with the big passive heatsinks like the Zalman northbridge shown below you still need fans to provide airflow of some sort when running your FPGAs at a high clock speed. with those black heatsinks you see in the pictures, to keep the FPGAs cooled we had to set 2 80mm fans side by side blowing on the FPGAs

img

I was thinking something along the lines of http://thermalright.com/products/index.php?act=data&cat_id=8&id=106

That could almost work, just change the orientation, it should be able to cover three of the chips (one on the left, one on the right, one on the top) and the very front one could just use a http://thermalright.com/products/index.php?act=data&cat_id=8&id=107

But thats like $200 worth of heatsinks, but it also might not need fans.

Edit:
http://ultimatepccooling.com/thhrifxchco1.html $28
http://ultimatepccooling.com/thhrifxchco.html $27

So, $111 or so.

PatrickHarnett

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Just financed the sixth one of these and expect it (and the other five) to be shipped at the end of next week.

stcupp

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Quote from: DiabloD3 on May 14, 2012, 05:43:10 PM

It'd be nice if you could find a heatpipe-type solution so people can put quieter cooling on their rigs.

Also, the URL in your sig is 404.

The main problem in this design for cooling is the amount of space between each fpga card.... You may be able to find a small waterblock something like this:

Quote from: GenTarkin on May 14, 2012, 06:14:27 PM

So, that mean passive heatsinks wont cool enough? cuz those little fans really REALLY suck, they die nearly instantly LOL...

It all depends on what speed you run the FPGAs.... even with the big passive heatsinks like the Zalman northbridge shown below you still need fans to provide airflow of some sort when running your FPGAs at a high clock speed. with those black heatsinks you see in the pictures, to keep the FPGAs cooled we had to set 2 80mm fans side by side blowing on the FPGAs

GenTarkin

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So, if ur putting on little fan / heatsinks, these things will be whiny little bastards huh? -- LOL

TheSeven

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Quote from: GenTarkin on May 14, 2012, 06:14:27 PM

So, that mean passive heatsinks wont cool enough? cuz those little fans really REALLY suck, they die nearly instantly LOL...

There's generally no way to cool these FPGAs passively unless you have really huge heatsinks. Blame their nasty plastic package for that.
Actually I'm fairly happy with these deepcool northbridge heatsinks and their fans, they're almost silent and seem to work really well. However you can also just use those digikey heatsinks shown in the picture (or also the deepcools with their fans removed) and have a big case fan blow into them from the side.

GenTarkin

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Quote from: stcupp on May 14, 2012, 02:25:06 PM

Quote from: GenTarkin on May 14, 2012, 11:43:02 AM

So, Im curious will the fpga's themselves come w/ the heatsink pictured? Will this be suffecient enough cooling to perform @ 200mh/s / fpga?
Or will I need to go find HSF's for them as well?

No, We've updated the boards to allow for bigger northbridge / older GPU heatsinks, the new design also includes 4 fan headers. We plan on putting a heatsink/fan combo on each fpga that will dissipate around 25 watts of heat which is more than enough cooling for these FPGA's. Heres some examples:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835119079
http://www.vantecusa.com/en/product/view_detail/93

So, that mean passive heatsinks wont cool enough? cuz those little fans really REALLY suck, they die nearly instantly LOL...

DiabloD3

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Quote from: stcupp on May 14, 2012, 02:25:06 PM

Quote from: GenTarkin on May 14, 2012, 11:43:02 AM

So, Im curious will the fpga's themselves come w/ the heatsink pictured? Will this be suffecient enough cooling to perform @ 200mh/s / fpga?
Or will I need to go find HSF's for them as well?

No, We've updated the boards to allow for bigger northbridge / older GPU heatsinks, the new design also includes 4 fan headers. We plan on putting a heatsink/fan combo on each fpga that will dissipate around 25 watts of heat which is more than enough cooling for these FPGA's. Heres some examples:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835119079
http://www.vantecusa.com/en/product/view_detail/93

It'd be nice if you could find a heatpipe-type solution so people can put quieter cooling on their rigs.

Also, the URL in your sig is 404.

TheSeven

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Ah, right, forgot that you moved away from that FTDI in the meantime

stcupp

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Quote from: GenTarkin on May 14, 2012, 11:43:02 AM

So, Im curious will the fpga's themselves come w/ the heatsink pictured? Will this be suffecient enough cooling to perform @ 200mh/s / fpga?
Or will I need to go find HSF's for them as well?

No, We've updated the boards to allow for bigger northbridge / older GPU heatsinks, the new design also includes 4 fan headers. We plan on putting a heatsink/fan combo on each fpga that will dissipate around 25 watts of heat which is more than enough cooling for these FPGA's. Heres some examples:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835119079
http://www.vantecusa.com/en/product/view_detail/93

Quote from: TheSeven on May 14, 2012, 12:05:43 PM

What do you base that information on? Are you piggybacking on nelisky's x6500 cgminer porting effort? Or who's gonna port that?

The interface is similar to Icarus and BFL, as long I have time I will code it myself... but I may find someone else that already knows cgminers source very well to do it, I'm not sure yet.

TheSeven

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Quote from: stcupp on May 14, 2012, 03:30:21 AM

Quote from: GenTarkin on May 11, 2012, 11:35:07 AM

nice, how soon would cgminer be able to mine using one of these?
Also, is the individual parts ready for purchase as well?
IE: might be interested in starting w/ just the backplane & 1 fpga and growing it over time.

I'd say we should have cgminer mining on this board in a couple weeks 1 month max.

What do you base that information on? Are you piggybacking on nelisky's x6500 cgminer porting effort? Or who's gonna port that?

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