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b@llzilla
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Message 14415 - Posted: 27 Jan 2010 | 16:19:22 UTC

I'm running my 295s at 750 Core, 1500 Shader and 1300 memory clocks but WUs seem to take the same ammount of time as stock clocks? Whats up with that?

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Message 14588 - Posted: 29 Jan 2010 | 0:56:39 UTC - in response to Message 14415.

Variation in task completion times just. Its hard to notice a 5% increase in performance after running a few tasks.

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Message 14589 - Posted: 29 Jan 2010 | 2:24:28 UTC - in response to Message 14588.

My GPU is 30% overclocked... if my WU were taking 7-9 hours at stock settings, I expected them to take 5 to 7 hours overclocked

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Message 14655 - Posted: 29 Jan 2010 | 9:40:11 UTC - in response to Message 14589.

The core does not help so I leave those at stock but you should see a substantial benefit from shaders and a little bit from memory. When I set my 295 at 576 core, 1512 shader, 1080 memory I process GIANNI_BIND WUs in ~8 hours. Are your BOINC folders excluded from your AV scans? What else do you have running on the PC?
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Message 14792 - Posted: 29 Jan 2010 | 14:43:05 UTC - in response to Message 14655.

Your problems might stem from the OC, a limiting hardware component, or another program (AV, defrag, automatic updates are on, the evil Indexing Services...).

30% is a Very BIG OC for a GPU, and I see you are getting quite a few errors!
What cooling do you use?
I don’t have a GTX 285 but I know my GTX260 (55nm) was only good for about 11% OC. I would suggest you reduce your clocks to something similar to Snow Crash’s example/suggestion.
What about your CPU, how is that clocked (and cooled)?
What are your temperatures like (CPU and GPU)?

The balance of that could be a bit CPU shy depending on clock speeds. You haven’t underclocked or turned off HT? Yeah, I know I am talking about an i7, but you have big 5 GPUs. Once a CPU is being utilized over about 60% it starts to underperform in some areas. By the time it gets to 80% this becomes noticeable/annoying. Look into the Details your CPU workload (task manager).

I know that CPU can drop clock speeds if it gets too hot. I am not sure how GPUs deal with overheating. Keep an eye on speeds and temps with CPUZ and GPUZ (use Core Temp for CPU).
PS. I hope you are not trying to crunch any non-GPUGrid tasks on that rig.

One last thing, what is your hard drive setup (Raid 0, 5, or just a single SATA), and what does Task Manager say about it?

Post your findings.

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Message 14806 - Posted: 29 Jan 2010 | 19:39:21 UTC - in response to Message 14792.

Your device appears 'here' to have 5 GTX 285's!
So you have 4 GTX 295's and 1 GTX 285.

Thats 9 GPUs to feed.

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Message 14853 - Posted: 31 Jan 2010 | 3:16:46 UTC - in response to Message 14806.

SK ... what are you talking about? There are 2 physical 295s and one 285 which equals 5 GPUs from a processing perspective. The clocks I posted which you say are conservative are actually the same 30% (shaders from 1242 stock to 1512, shoot if I turn the volts up I can get to 1584 rock solid stable). I know you are working hard and providing lots of info but maybe you need to slow down a little bit.

# There are 5 devices supporting CUDA
# Device 0: "GeForce GTX 295"
# Clock rate: 1.24 GHz
# Total amount of global memory: 939524096 bytes
# Number of multiprocessors: 30
# Number of cores: 240
# Device 1: "GeForce GTX 295"
# Clock rate: 1.24 GHz
# Total amount of global memory: 939524096 bytes
# Number of multiprocessors: 30
# Number of cores: 240
# Device 2: "GeForce GTX 295"
# Clock rate: 1.24 GHz
# Total amount of global memory: 939524096 bytes
# Number of multiprocessors: 30
# Number of cores: 240
# Device 3: "GeForce GTX 295"
# Clock rate: 1.24 GHz
# Total amount of global memory: 939524096 bytes
# Number of multiprocessors: 30
# Number of cores: 240
# Device 4: "GeForce GTX 285"
# Clock rate: 1.48 GHz
# Total amount of global memory: 1073741824 bytes
# Number of multiprocessors: 30
# Number of cores: 240
____________
Thanks - Steve

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Message 14888 - Posted: 1 Feb 2010 | 0:51:13 UTC - in response to Message 14853.
Last modified: 1 Feb 2010 | 1:18:52 UTC

Steve, your right. I looked here, http://www.gpugrid.net/hosts_user.php?userid=40424 and saw 5 GTX285's listed; [5] NVIDIA GeForce GTX 285 (1024MB) driver: 19062
I later figured it was just reading the first card and the other 4 were GTX295s each with 2 GPUs each. Figured wrong! Might not be using the 7 slot PCIE mobo either.

As I said, I don’t have a GTX295, so I guessed your GPU clock @576MHz was native or just slightly overclocked. My GTX260 is @625MHz native/FOC. He was getting too many task errors, so I thought he might be pushing the OC. I now see that you have higher shader clock rates.

Anyway, the errors have subsided since the 27th.

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Message 15114 - Posted: 10 Feb 2010 | 8:28:37 UTC - in response to Message 14655.

Cool... I'll try just overclocking shaders and memory.

Im running 2 295s and a 285 (5GPUS) on a EVGA 4 Way Classified (7 PCIE) Mobo

All the cards are volt modded and water cooled

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Message boards : Graphics cards (GPUs) : Overclocking for GG