| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Community
Forum: Teams
Thread: Minnesota Crunchers |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 6196
|
|
| Author |
|
|
kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges: 
|
My ATI 6950 is completing milkyway wu's 1 min 47 seconds. Might have to consider that card. Not sure why AMD's web site doesnt list it as a double precision like it does the 7900 series. The 7950 prices have dropped under 400 bucks. With nVidia coming out with another card, maybe they will drop more. How much did you pay for the 7750? The 7750 is slow, remember! Milkyway WUs are taking about 11 mins on it. I paid $110 for the 7750. Next time I have to reboot the cruncher, I'll plug in my Kill-A-Watt and see how much power the whole thing is pulling at the wall.  |
||
|
|
swiftmallard
Advanced Cruncher Joined: Apr 6, 2010 Post Count: 115 Status: Offline Project Badges: 
|
My 5870 does two WUs in 2:06 running at 900/300
|
||
|
|
Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
|
Are you running at that speed 100% constantly? What are you using to OC it with? Crunching two at a time? Found out I can turn mine into a 6970 with a software change.
----------------------------------------Think I will wait until the 7950 drops to under 350. Looking at the 7750 specs, double precision floating point but not listed as a double precision card. Must be something new in the processor or something. Would have thought Kate's would have better time but could be her CPU dragging it down. Was it stated somewhere that the gpu's don't need to be crossfired in order for boinc to use as many gpu's installed? Thinking my next build will be a cheap quad core but 3 or 4 gpu's to crunch only with them. Only issue would be the electic bill. From what I've read so far, the 7000 series don't use as much juice as older cards but still more powerful. Unless you OC them. With projects moving to the GPU platform, seems allot cheaper to build than multi CPU. Comments welcome from anyone already doing this.
Crunching for humanity since 2007!
---------------------------------------- [Edit 1 times, last edit by Bearcat at Apr 29, 2012 6:09:31 PM] |
||
|
|
nanoprobe
Master Cruncher Classified Joined: Aug 29, 2008 Post Count: 2998 Status: Offline Project Badges: 
|
@Bearcat. FWIW my 5830 does a M@H WU in 1:40 running the core clock stock(800) and the memory clock downclocked 70%(from 1000MHz. to 300Mhz.) with the GPU load @ 98%. The memory clock speed has little to no effect on run times and downclocking saves 20 watts of power and 10c of heat. I personally found no advantage running 2 at a time as it just took twice as long. I use an app_info file to lower the GPU usage to 70% which ups the run times to 2:05. It's a trade off to save power, reduce heat and put less strain on the GPU for longevity. YMMV.
----------------------------------------I remember reading somewhere that running in CF mode is not recommended for crunching but I don't remember where I read it. @kateiacy. Your runtimes seem rather long. Have you freed a CPU core to run along side the GPU?
In 1969 I took an oath to defend and protect the U S Constitution against all enemies, both foreign and Domestic. There was no expiration date.
----------------------------------------  [Edit 1 times, last edit by nanoprobe at Apr 29, 2012 11:14:42 PM] |
||
|
|
swiftmallard
Advanced Cruncher Joined: Apr 6, 2010 Post Count: 115 Status: Offline Project Badges:
|
Are you running at that speed 100% constantly? What are you using to OC it with? Crunching two at a time? Found out I can turn mine into a 6970 with a software change. Think I will wait until the 7950 drops to under 350. Looking at the 7750 specs, double precision floating point but not listed as a double precision card. Must be something new in the processor or something. Would have thought Kate's would have better time but could be her CPU dragging it down. Was it stated somewhere that the gpu's don't need to be crossfired in order for boinc to use as many gpu's installed? Thinking my next build will be a cheap quad core but 3 or 4 gpu's to crunch only with them. Only issue would be the electic bill. From what I've read so far, the 7000 series don't use as much juice as older cards but still more powerful. Unless you OC them. With projects moving to the GPU platform, seems allot cheaper to build than multi CPU. Comments welcome from anyone already doing this. In short: Yes, Catalyst, correct. Here is the app_info file use: http://www.worldcommunitygrid.org/forums/wcg/...d,9462_offset,2950#372006 |
||
|
|
kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
|
@kateiacy. Your runtimes seem rather long. Have you freed a CPU core to run along side the GPU? @nanoprobe. For double-precision Milkyway WUs, it doesn't make a lot of difference whether I free up a CPU core or not (10.5 hrs vs 11 hrs). On the other hand, for POEM (single-precision OpenCL), it makes a huge difference (55-58 mins with a free CPU core vs 8 hrs without). What kind of run times do those of you with higher end ATI cards get on POEM? Edited to correct POEM run time.  [Edit 1 times, last edit by kateiacy at Apr 30, 2012 4:30:19 PM] |
||
|
|
Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
|
Here is a wiki chart about the 7000 series cards from AMD. Interesting.
----------------------------------------http://en.wikipedia.org/wiki/Southern_Islands_(GPU_family) Look at the right side in green on the floating point. Might explain Kate's run time. Not sure though. Kate, are you crunching with both CPU and GPU at the same time? If so, try without using the CPUs and see if that makes any difference.
Crunching for humanity since 2007!
|
||
|
|
kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
|
Here is a wiki chart about the 7000 series cards from AMD. Interesting. http://en.wikipedia.org/wiki/Southern_Islands_(GPU_family) Look at the right side in green on the floating point. Might explain Kate's run time. Not sure though. Kate, are you crunching with both CPU and GPU at the same time? If so, try without using the CPUs and see if that makes any difference. Yup, that's what I mean about SLOW double precision on this machine. It's good enough for me to do testing and development on, but not good for production crunching. The single prec is much better. I'm still happy with it as a max-55 watt-TDP card that doesn't need an additional power supply. And it should run cool enough that I can keep it crunching during the summer. Off to work now. I'll try this evening crunching on the GPU with no crunching going on on the CPUs. As I mentioned in a previous message, I have tried leaving one CPU core free while GPU crunching (makes a big difference on single prec but not double), but I haven't tried leaving all the CPU cores free. [Edit 1 times, last edit by kateiacy at Apr 30, 2012 12:50:54 PM] |
||
|
|
nanoprobe
Master Cruncher Classified Joined: Aug 29, 2008 Post Count: 2998 Status: Offline Project Badges:
|
On the other hand, for POEM (single-precision OpenCL), it makes a huge difference (58 secs with a free CPU core vs 8 hrs without). Your card does a POEM GPU task in 58 seconds? 
In 1969 I took an oath to defend and protect the U S Constitution against all enemies, both foreign and Domestic. There was no expiration date.
|
||
|
|
kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
|
On the other hand, for POEM (single-precision OpenCL), it makes a huge difference (58 secs with a free CPU core vs 8 hrs without). Your card does a POEM GPU task in 58 seconds? Ack, what a typo! It is 55-58 minutes . What are your POEM timings like? |
||
|
|
|