Anyone folding on GTX 295?

[Denithor]

Thinking that would be the most cost effective way to fold. And fun for gaming too.

EDIT: BFG GTX 295 $440 (no rebates)

 

[GLeeM]

1. How much power from the wall would two of those on an i7 mobo draw?

2. What size PSU would it take for two of them?

3. What kind of ppd would that give?

4. ppd with a 9800GX2 for $250?

 

[Denithor]

1. 675W under load, 735W peak draw

2. Corsair 850TX for $120AR just to be safe

3. Single GTX 260/192 yields ~6.5k ppd. Subtract 10% or so for overhead and you could see 22-24k ppd from a pair of GTX 295s.

4. 9800GT yields ~4.5k ppd so 8k ppd from 9800GX2, about 16k ppd from a pair.

 

[GLeeM]

1. Would the GPU client be over "peak" (735W) or closer to "load" (675W)?

2. I suspected 750 watts wouldn't be enough.

3. Awesome ppd!

4. Good ppd depending on who much they draw from the wall? Would the 9800GX2 draw about the same?

If WUs get bigger/tougher I suppose the newer tech would do better?

I guess I could look at it as another electric space heater (I already run two for about 2000W) in the winter, and cut back on the number of clients for the two months we don't need heat or only run during the cool of the night.

 

[Denithor]

1. F@H is easier on GPUs than games & benchmarks tend to be (my cards run way cooler folding than during heavy gaming session or furmark stability testing or stuff). So "load" would be close to accurate but you might see "peak" usage during startup or something.

2. Which is why I recommended a safety margin. 850W FTW!!

3. Indeed. Probable range 20-24k ppd depending on how much is lost to "overhead."

4. Hard to find this data. Not apples-to-apples but fairly close. On a QX9770 platform the 9800GX2 solo sucks up 290W and two in SLI drain 460W. So lower power consumption but also lower ppd.

5. Yes, as WUs get more intense the newer cores with additional shaders will do a better job.

 

[Denithor]

XtremeSystemsForums

Weeeeeeee!!!

Read up in there, they've got a single GTX 295 cranking as high as 18.3k ppd alone.

Note they have seen lots of problems getting a pair of GTX 295s to fold nice together.

Great quote from in there:

Bigger, Better, Stronger, Faster .... Electric Bills!