Forum > GPU crunching
Latest drivers (NVidia and ATI)
Jason G:
--- Quote from: k6xt on 28 Jul 2009, 04:35:47 pm ---N275GTX @666MHz, 896MB GDDR3 ram@2322MHz, 240 stream processors for $200
N260GTX @655MHz, 1792MB DDR3 ram@2100MHz, 216 stream processors for $295
So the questions are, are stream processors important to CUDA? Is less but faster memory better than more but slower memory? Is there something important to CUDA in the 275 vs 260?
--- End quote ---
I'd have to say the 275 looks like the better deal to me, since there's extra processing (~10% more processors & some extra clock speed) grunt all around. I'm not exactly sure what would need that much RAM as is on the 260, but the apps in their current (& likely foreseeable future) form wouldn't use it. So, ignoring processing, the choice will come down to power requirements and perhaps cooling etc..., but the 275 looks better to me.
Tye:
--- Quote from: k6xt on 28 Jul 2009, 04:35:47 pm ---I'm getting a video card, one of the less expensive types. It will be a MSI card, so my MSI mobo monitor will cover the GPU as well. I have two in mind - which will provide best CUDA performance?
N275GTX @666MHz, 896MB GDDR3 ram@2322MHz, 240 stream processors for $200
N260GTX @655MHz, 1792MB DDR3 ram@2100MHz, 216 stream processors for $295
So the questions are, are stream processors important to CUDA? Is less but faster memory better than more but slower memory? Is there something important to CUDA in the 275 vs 260?
--- End quote ---
I'd definitely go with the 275. See this page for relative performance (GFLOPS column) of each at their default speeds: http://en.wikipedia.org/wiki/GeForce_200_Series . These GFLOPS numbers are not the same you see in BOINC, but they do scale well IME (8800GT, G94 9600 GSO, and G92 9600 GSO). I'm now running dual-GPU in linux with some of these and all works great!
Scaling the two choices you give with their GPU speed gives ~915 GFLOPS for the 260-216, and 1064 GFLOPS for the 275, approximately. This also just about matches the ratio of performance you get by (666*240)/(655/216). Math works pretty well here, since all we're doing is crunching - effectively a synthetic benchmark itself.
k6xt:
--- Quote ---N275GTX @666MHz, 896MB GDDR3 ram@2322MHz, 240 stream processors for $200
N260GTX @655MHz, 1792MB DDR3 ram@2100MHz, 216 stream processors for $295
So the questions are, are stream processors important to CUDA? Is less but faster memory better than more but slower memory? Is there something important to CUDA in the 275 vs 260?
--- End quote ---
--- Quote ---I'd definitely go with the 275. See this page for relative performance (GFLOPS column) of each at their default speeds: http://en.wikipedia.org/wiki/GeForce_200_Series . These GFLOPS numbers are not the same you see in BOINC, but they do scale well IME (8800GT, G94 9600 GSO, and G92 9600 GSO). I'm now running dual-GPU in linux with some of these and all works great!
--- End quote ---
...Which thanks to you and Jason G. is exactly what I chose. It helped a lot that the 275 card is $100 less at newegg. All the card will do is process CUDA WU and run my monitor, no video, gaming etc., so whatever the other $100 would have brought me, I probably don't care.
Art
Lord Asmodeus:
The 275 is newer and better, the 260 will soon disappear. 1792MB is useless on this card, it would only be necessary on a very GPU demanding videogame (GTA IV), on a 30" screen, and then, the card has not enough guts. Maybe in SLI or tri-SLI it would make sense, but if you have so much money, you don't take a "middle segment" 260, you go directly to the GTX285 with 2GB of RAM.
I'm using the new drivers/new DLL for an hour now and it seems OK.
I'm still with the V11 VLARKill because the V12 doesn't work for me.
k6xt:
Well the 275GTX is in and running as of an hour ago. Immediately I noticed it runs hot. GPUZ says its at 90 deg C with room temp about 75 C. The fans are at full speed, bit on the noisy side. Would you folks think this is about right?
Link to current CUDA WU:
http://setiathome.berkeley.edu/workunit.php?wuid=487945757
and to host:
http://setiathome.berkeley.edu/show_host_detail.php?hostid=4296770
Thanks Art
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