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Number crunching :
# of tasks per GPU list
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Author | Message |
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skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
I ran a bunch of shorties over the weekend and they ran fairly close to the 560s our there... assuming they were running 3 at a time as well. I may try 4 later today just to see if the 6970 can handle it In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
Blake Bonkofsky Send message Joined: 29 Dec 99 Posts: 617 Credit: 46,383,149 RAC: 0 |
I run 2 at a time on my 5 GTX460's (1gb). I tried 3 at a time, but it gave me no measurable gain, and made my triple 460 machine completely unusable and would often lock up or reboot. Now with 4x GTX460's in that machine, I seriously doubt it could handle it for long. I still only run 2 at a time on my GTX570, but will probably bump to 3 tonight since that machine has more or less peaked in RAC. Sounds about right. Mine do 2 at a time in roughly 20 minutes (overclocked to 900mhz), so that's about 6/hr. With a single WU, they take about 12-14 minutes IIRC, so thats 4.3-5/hr. I honestly don't remember what mine did with 3 at a time, as it was never reliable enough to keep it there. |
HAL9000 Send message Joined: 11 Sep 99 Posts: 6534 Credit: 196,805,888 RAC: 57 |
I am working on a little page from the data that you guys have provided so far. It is just getting done in my "other" "other" free time. SETI@home classic workunits: 93,865 CPU time: 863,447 hours Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[ |
Grutte Pier [Wa Oars]~MAB The Frisian Send message Joined: 14 Nov 10 Posts: 18 Credit: 2,020,802 RAC: 0 |
Tried it with 2 WU's but my GTX460FTW1GB/266.58 needs more than twice the time compared to a single WU. |
Blake Bonkofsky Send message Joined: 29 Dec 99 Posts: 617 Credit: 46,383,149 RAC: 0 |
Tried it with 2 WU's but my GTX460FTW1GB/266.58 needs more than twice the time compared to a single WU. Your times seem VERY long compared to my GTX460's. I see you already are running the X38 app, same as me. My GTX460 is clocked a little faster than yours (875mhz vs 850mhz), but your setup is taking almost twice as long to complete a similar AR WU. Even shorties are taking ~8 minutes for you. My rig is doing two at a time, around 3-4 minutes for shorties, and ~20 for normal WU's. A few of the normal WU's I found for yours were around 35 minutes. What are the specs on the rest of your system? Also, I'm seeing a lot of errors from that machine, are your cards downclocking by chance? Use GPU-Z to see the current status of your cards, including load, temperature, clock rate, etc. |
Helsionium Send message Joined: 24 Dec 06 Posts: 156 Credit: 86,214,817 RAC: 43 |
I conducted a test on my machine with 2 OC'ed GTX 560 Ti cards (900 MHz Core / 1070 MHz Memory, 1 GB VRAM, Lunatics x38g). The result is that there is a significant advantage of running 2 or 3 WUs at once over running only one at a time. However, the test does not clearly show any advantage or disadvantage of running more than two WUs at a time. The two GPUs have different memory usages because the first one displays to two 1080p screens. At least that's what I think. 1 WU at a time: Memory 473 MB / 248 MB GPU Load 65-80% 8 WUs completed. When the timer stopped, the active WUs were at 56.9 / 57.7 percent. Thus the score is 9.15 WUs / 10 minutes. 2 WUs at once: Memory 741 MB / 496 MB GPU Load 95-99% 12 WUs completed. When the timer stopped, the active WUs were at 50.2 / 46.2 / 36.8 / 29.9 percent. Thus the score is 13.63 WUs / 10 minutes. 3 WUs at once: Memory 937 MB / 743 MB GPU Load 98-99% 12 WUs completed. When the timer stopped, the active WUs were at 39.3 / 30.3 / 28.9 / 27.7 / 25.0 / 17.7 percent. Thus the score is 13.69 WUs / 10 minutes. |
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