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Old 2014-12-04, 16:43   #23
Mark Rose
 
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Quote:
Originally Posted by sixblueboxes View Post
Thanks for responding!

The one with the better cooler costs less? Wow... why is that?

And which one has the power and thermal throttle? They are both GTX's.
All of the GTX 970's at least have a power and thermal limit. I believe it's imposed by Nvidia.
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Old 2014-12-04, 18:12   #24
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Quote:
Originally Posted by Mark Rose View Post
All of the GTX 970's at least have a power and thermal limit. I believe it's imposed by Nvidia.
What's the difference between the 980 and the 970?
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Old 2014-12-04, 18:28   #25
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Quote:
Originally Posted by sixblueboxes View Post
What's the difference between the 980 and the 970?
http://gpuboss.com/gpus/GeForce-GTX-...eForce-GTX-970

Basically, the price is the biggest difference. Some people have overclocked a GTX 970 to GTX 980 performance levels. Not all GTX 970 cards are capable of it though.
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Old 2014-12-04, 18:44   #26
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The graphics cards *should* work on that motherboard but it is in fact quite old.

Be advised that you only have one PCI-Express x16 slot, so if you already have a GPU in there, you will have to remove it to install the new one. Your PCI-E is gen 2.0 and the GPU uses gen 3.0 but they're backward compatible; you're just going to lose out on half of the PCI-E bandwidth. This is irrelevant for Trial Factoring, but I can't speak to the bandwidth requirements of CUDALucas.
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Old 2014-12-04, 19:03   #27
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Quote:
Originally Posted by sixblueboxes View Post
What's the difference between the 980 and the 970?
The 980 is about 20% faster for TF work, but it costs a lot more.

We have a limited number of open slots to put cards in. If we had a lot of slots we would have bought 970 cards for certain.
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Old 2014-12-04, 19:14   #28
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We have mentioned this before but we will mention it again: A design that exhausts heated air *outside* the case is, in our opinion, a really easy design to work with.

We have two boxes that are set up with cards that exhaust hot air like that.

One box is huge and has a pile of nice fans and top-of-the-line components. The other box is a run-of-the-mill low-end HP with an upgraded power supply.

Both boxes work fine!

Just last night we bumped up the fan speed on our cards. The limiter before was thermal, which we have set to 79°C, but now the limiter is voltage and power. We could easily overclock the cards but we choose to run them stock. We do not have time to babysit them! (The fans are loud so factor that in!)

All of our cards are now running stable at 1379.5MHz core clock and about 77°C.

We do not think that running the fans at a high speed will wear them out faster. If we are wrong please let us know!
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Old 2014-12-04, 19:46   #29
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Wait 6 months and then contact your GPU maker for replacement fans. The fans will die, it is just a matter of when. Most makers will ship just fans (no sending the whole GPU card back via RMA) if you push/offer that idea. I only buy XFX cards now, and never had a problem with them sending replacement fans for noisy (worn out) ones.
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Old 2014-12-05, 20:15   #30
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Does anyone have benchmarking data for the 970 with CudaLucas?
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Old 2014-12-06, 04:27   #31
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Quote:
Originally Posted by sixblueboxes View Post
Does anyone have benchmarking data for the 970 with CudaLucas?
I think this site: http://www.mersenne.ca/cudalucas.php has what you are looking for
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Old 2014-12-08, 18:35   #32
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Quote:
Originally Posted by Primeinator View Post
I think this site: http://www.mersenne.ca/cudalucas.php has what you are looking for
I guess I'm unsure how to compare that data to my current GPU:

Continuing work from a partial result of M69307841 fft length = 3932160 iteration = 2500001
Iteration 2510000 M( 69307841 )C, 0xfa8028ad77aebd3c, n = 3932160, CUDALucas v2.03 err = 0.1564 (11:29 real, 68.9165 ms/iter, ETA 1278:35:34)
Iteration 2520000 M( 69307841 )C, 0xfa83316987ba721c, n = 3932160, CUDALucas v2.03 err = 0.1564 (11:28 real, 68.8719 ms/iter, ETA 1277:34:23)
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Old 2014-12-08, 18:47   #33
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Why are you using v2.03? That's a couple of years out of date.
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