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Author Topic: CANCELLED [WTS] 10 Butterfly Labs BitForce Singles (8 GH)  (Read 5596 times)
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May 25, 2012, 10:06:08 PM
 #21

BTW, how long are those 3x3 power cables? Do you know if they are 18AWG or 16? Did you happen to get them from Cablez (he makes some nice ones)?
Yup, got the cables from Cablez "Three 32" cables with a pitch of 3.5" between 2.5/5.5mm plugs and as you saw 3 plugs per cable going to an 8pin PCIE female for direct to PSU connection".  There was a small problem with one of the cables that he's helping me with (I have 4 of them), so one of the BFL's is running on it's stock PSU.  They are 16 AWG and don't give off any heat, but the plugs are a little slippery, so I made up some elastic bands that can hold them in place without blocking any vents or airflow.

A bit too short for what I need, but thanks for the info.

For anyone interested, the stock BFL PSU is an inline generic 120W model from China. It is quite large and weighs about the same as the Single itself. It has relatively poor conversion efficiency and (a) gets quite hot and (b) wastes about 8W compared to a high-efficiency ATX PSU. Phraust is using a high-efficiency ATX PSU (AX1200, ~90% efficient). Not only will powering your Singles from an ATX PSU like this save a lot of cable clutter, it will save you about 10% in heat and electricity compared to using the stock PSU. If you can afford the cables and PSU, I'd recommend it (unless the extra heat and power bill doesn't phase you).

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May 25, 2012, 10:59:24 PM
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For anyone interested, the stock BFL PSU is an inline generic 120W model from China. It is quite large and weighs about the same as the Single itself. It has relatively poor conversion efficiency and (a) gets quite hot and (b) wastes about 8W compared to a high-efficiency ATX PSU. Phraust is using a high-efficiency ATX PSU (AX1200, ~90% efficient). Not only will powering your Singles from an ATX PSU like this save a lot of cable clutter, it will save you about 10% in heat and electricity compared to using the stock PSU. If you can afford the cables and PSU, I'd recommend it (unless the extra heat and power bill doesn't phase you).

So is the 80Watt figure for those BFL the draw from the card, or from the wall?

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May 25, 2012, 11:09:21 PM
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For anyone interested, the stock BFL PSU is an inline generic 120W model from China. It is quite large and weighs about the same as the Single itself. It has relatively poor conversion efficiency and (a) gets quite hot and (b) wastes about 8W compared to a high-efficiency ATX PSU. Phraust is using a high-efficiency ATX PSU (AX1200, ~90% efficient). Not only will powering your Singles from an ATX PSU like this save a lot of cable clutter, it will save you about 10% in heat and electricity compared to using the stock PSU. If you can afford the cables and PSU, I'd recommend it (unless the extra heat and power bill doesn't phase you).
So is the 80Watt figure for those BFL the draw from the card, or from the wall?

That's from the wall. I've measured with a Kill-A-Watt meter. But it seems that there is some variation in Single 'batches' from what I understand. The ones I have are all 80W. A good ATX supply can reduce it to about 72-74W at the wall (about 5.5A @ 12V into the Single itself).

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March 13, 2013, 11:11:59 PM
 #24

I am looking to buy a BFL FPGA single if there is anyone out there selling. Possibly more depending on the price.

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March 14, 2013, 01:33:32 AM
 #25

Almost a year old necro-thread on a cancelled sale, and not-relevant to boot!  Well done.  Got me to peek.

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April 13, 2013, 03:53:15 AM
 #26

Lol yeah you are right indeed. I would buy an FPGA tho, for cheapish

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