ZTEX USB-FPGA Modules 1.15x and 1.15y: 215 and 860 MH/s FPGA Boards - page 42.

ztex

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ZTEX FPGA Boards

Quote from: ummas on January 11, 2012, 08:10:18 AM

Are you planning sommething with more Spartans 6 ?

Multi-FPGA solutions are not much cheaper. Their main advantage is that they are easier to use if you run a large cluster.

Switching the design (I will not produce two designs for the same task) costs additional time, and time is money. Therefore there will be at least no quick multi-FPGA solution.

ummas

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sooner = better

@ztex
Are you planning sommething with more Spartans 6 ?

DeepBit

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Quote from: rupy on January 11, 2012, 07:29:28 AM

Quote from: DeepBit on January 11, 2012, 06:27:12 AM

Quote from: rupy on January 11, 2012, 05:01:53 AM

So what's your reason for going FPGA, do you live in an expensive KWh country?
I think 28nm Artix-7 FPGA's will be available in a year or so.

It will be too late.

Too late for what?

This depends of difficulty, of course, but sometimes by mining with current "less efficient" FPGA miners you can get more profit comparing to better 28 nm FPGA with 1 year delay before start.

bulanula

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Quote from: rupy on January 11, 2012, 07:29:28 AM

Quote from: DeepBit on January 11, 2012, 06:27:12 AM

Quote from: rupy on January 11, 2012, 05:01:53 AM

So what's your reason for going FPGA, do you live in an expensive KWh country?
I think 28nm Artix-7 FPGA's will be available in a year or so.

It will be too late.

Too late for what?

I think they have plans for developing a custom BTC mining ASIC.

At least that is what the rumor mill has been saying.

rupy

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Quote from: Turbor on January 11, 2012, 06:41:56 AM

I'm in Switzerland. At 2 to 3$ there was almost no gain with GPU for me. Now @ 7$ it's a different story but i like to try out new things. It's not about max gain. It's a(n) (expensive) hobby. Still waiting for BFLs product. But their power usage was a big disappointment for me. This boards are twice as efficient compared to the first tests. Undecided

Ok, I agree with that! But I realize that if you have heating needs; GPU is the way to go. Although you build up a "dependency" on electricity for heating which is bad. I'm in Sweden so electricity is ~0.12$/KWh and I should be GPU mining, but I like the silence and the small size!

rupy

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Quote from: DeepBit on January 11, 2012, 06:27:12 AM

Quote from: rupy on January 11, 2012, 05:01:53 AM

So what's your reason for going FPGA, do you live in an expensive KWh country?
I think 28nm Artix-7 FPGA's will be available in a year or so.

It will be too late.

Too late for what?

Turbor

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I'm in Switzerland. At 2 to 3$ there was almost no gain with GPU for me. Now @ 7$ it's a different story but i like to try out new things. It's not about max gain. It's a(n) (expensive) hobby. Still waiting for BFLs product. But their power usage was a big disappointment for me. This boards are twice as efficient compared to the first tests. Undecided

DeepBit

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Quote from: rupy on January 11, 2012, 05:01:53 AM

So what's your reason for going FPGA, do you live in an expensive KWh country?
I think 28nm Artix-7 FPGA's will be available in a year or so.

It will be too late.

rupy

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So what's your reason for going FPGA, do you live in an expensive KWh country?

I think 28nm Artix-7 FPGA's will be available in a year or so.

Turbor

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Well i first bought one unit to test. Then i ordered the rest. The fastest board is closest to the first vent, then the 200 MHz units follow. The vents are not really used for cooling the boards. They just move air. 200er units run at almost zero error rate. Since i connected them directly to the computer, 4 is the right number. I also think it's too early to invest big time in this boards.

rupy

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yes, but then you only get the rebate on one chip! If you buy 1 then 4, like I will, I would understand; because then you get rebate on 4 cards!

sadpandatech

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Quote from: rupy on January 10, 2012, 05:57:54 PM

Turbor 2 questions:

- Why did you buy 4 when 5 gives you a rebated price?
- Also with that serial cooling the later FPGA's gets hotter air, you could cool them in parallel no?

"The volume discount is calculated based on the purchases within the last 10 weeks"

can't speak for his cooling solution though. ;p

rupy

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Turbor 2 questions:

- Why did you buy 4 when 5 gives you a rebated price?
- Also with that serial cooling the later FPGA's gets hotter air, you could cool them in parallel no?

rupy

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It takes outside air and pipes it from the inlet to the heatsink, theres a good cold flow. I know it's strange but my cables where too short. I will fix a proper sleeve when I get more FPGA's. I can heartily recommend the zalman heatsink with titan cooling paste. BTW I got really lucky with the PSU; just grabbed my GP AA/AAA chargers one. Cheesy

Inspector 2211

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Quote from: DeepBit on January 10, 2012, 02:25:13 PM

What's that air sleeve for ?

I think he pipes the exhaust air of the fan to the white plastic water canister, so that the water in it evaporates faster and humidifies the room air more than what would happen without this feeble air stream.

Turbor

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BitMinter

Interesting setup Wink

DeepBit

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What's that air sleeve for ? :)

rupy

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Turbor

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Got my new boards this morning. Had some troubles to get them working together but ztex was helping me with my sorrows (again Cheesy

). Well i guess that happens when a carpenter works with FPGAs. Now all 4 run fine. 3 of them make 200 MHz one 208 MHz.

Your best friend when you work with "bad board designs" Grin

SamHa1n

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I added higher risers and spaced them apart from each other by a couple of inches (before, I had them very close, sandwiched bottom to bottom with only about 10mm of spacing between them, and sitting on their sides).

What I am getting currently:

ztex_ufm1_15d1-04A32E1D29: f=192.00MHz, errorRate=0.00%, maxErrorRate=0.00%, nextMaxErrorRate=4.40%, submitted 2 new nonces, submitted hash rate 193.3MH/s

and

ztex_ufm1_15d1-04A32E1286: f=192.00MHz, errorRate=0.00%, maxErrorRate=0.34%, nextMaxErrorRate=4.39%, submitted 0 new nonces, submitted hash rate 192.8MH/s

I thought about water cooling for density and noise reasons, if cost was not an issue.

Topic: ZTEX USB-FPGA Modules 1.15x and 1.15y: 215 and 860 MH/s FPGA Boards - page 42. (Read 182450 times)