mersenneforum.org GPU to 72 status...
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2014-04-21, 16:09   #2784
chalsall
If I May

"Chris Halsall"
Sep 2002

233B16 Posts

Quote:
 Originally Posted by TheMawn From Friday May 16 to Monday May 26, I will be on another continent so my CPU and more importantly both GPUs will be down for 10 days @ 600 GHz-Days per day.
OK, thanks for the heads up.

Geezzz... Jerry has a power supply failure resulting in significant loss of cycles. Then LaurV loses two of his four cards due to another PSU failure (he was able to bring one back online using a spare (but smaller) unit), then people dare to take vacations!!!

I had hoped to be able to start going to 74 again at the end of the month, but now it looks like that won't be possible for a while longer.

The good news is we're slowly pulling ahead again going to 73 in the Cat4 range, and reclaiming the 1,588 candidates released at 72 a while ago as they expire. It's amazing just how much "churn" occurs up there, but as of the last couple of weeks no candidates are being assigned by Primenet for either LL'ing or P-1'ing at less than 73.

As always, if anyone has any spare GPU cycles, LL TF'ing would be much appreciated!!!

 2014-04-21, 16:42 #2785 James Heinrich     "James Heinrich" May 2004 ex-Northern Ontario 43·67 Posts I should be able to bring my 580 online as of May 2nd, which should add another ~430GHd/d
2014-04-21, 18:41   #2786
chalsall
If I May

"Chris Halsall"
Sep 2002

29×311 Posts

Quote:
 Originally Posted by James Heinrich I should be able to bring my 580 online as of May 2nd, which should add another ~430GHd/d
Coolness! Thanks. Good news!

 2014-04-21, 18:49 #2787 swl551     Aug 2012 New Hampshire 32216 Posts Soon I'll be able to move my GPU space heater out of the bedrooms and down into the basement. Then they can run round the clock again. I must say the proved to be EXCELLENT room heaters over the winter.
2014-04-21, 18:59   #2788
chalsall
If I May

"Chris Halsall"
Sep 2002

29·311 Posts

Quote:
 Originally Posted by swl551 I must say the proved to be EXCELLENT room heaters over the winter.
BTW, did you ever get them controlled via a USB temperature sensor?

2014-04-21, 19:32   #2789
swl551

Aug 2012
New Hampshire

14428 Posts

Quote:
 Originally Posted by chalsall BTW, did you ever get them controlled via a USB temperature sensor?
I got a cheap one from Amazon, but it proved unreliable. The professional sensors were too much . So I just used varying pre-defined duty cycles based on expected daily and overnight temperatures.

2014-04-21, 22:34   #2790
Gordon

Nov 2008

1111101002 Posts

Quote:
 Originally Posted by swl551 Soon I'll be able to move my GPU space heater out of the bedrooms and down into the basement. Then they can run round the clock again. I must say the proved to be EXCELLENT room heaters over the winter.
It's not the heat the (now dead) 580 put out (97C!!) but the noise

Now running dual 660's (overclocked) - getting 375 days/day and ...silence

2014-04-22, 02:05   #2791
kracker
ἀβουλία

"Mr. Meeseeks"
Jan 2012
California, USA

17×127 Posts

Quote:
 Originally Posted by Gordon It's not the heat the (now dead) 580 put out (97C!!) but the noise Now running dual 660's (overclocked) - getting 375 days/day and ...silence
Hmm, so you're getting less out of dual 660's than a 580 with less sound and more power consumption.

EDIT: Is Kepler really more power efficient W/GHz? Hmm...

Last fiddled with by kracker on 2014-04-22 at 02:07

2014-04-22, 20:59   #2792
Aramis Wyler

"Bill Staffen"
Jan 2013
Pittsburgh, PA, USA

16416 Posts

Quote:
 Originally Posted by Gordon Now running dual 660's (overclocked) - getting 375 days/day and ...silence
That doesn't sound right to me. Are you running two instances of mfactx? Or maybe you mean 375/card?

On my gtx480 + gtx580 I get 820 GHD/day in the 69M range with 2 instances of mfactc..

 2014-04-22, 21:34 #2793 James Heinrich     "James Heinrich" May 2004 ex-Northern Ontario B4116 Posts Sounds right to me. GTX 660 (not Ti) at stock speed (no boost) should be about 179GHd/d, so two of them about 358, so 375 sounds about right. For reference: GTX 480 (368) + GTX 580 (433) = 801GHd/d at stock clocks (no boost)
 2014-04-22, 22:09 #2794 Xyzzy     "Mike" Aug 2002 755910 Posts When we ran our 660Ti it was good for ~275 a day. With a bit of P-1 testing on the CPU we could just barely squeak by 2,000 a week.

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