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nVidia/ATI GPU2 clients Folding clients that use GPUs on graphics cards running the GPU2 client

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Old 23rd November, 2009, 05:00 PM
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MemtestG80 for CUDA-enabled NVIDIA cards

If you have problems with an unusual number of failed work units, EUEs, NaNs etc, try testing your card's memory with this small program written by a Pande researcher:

MemtestG80 - A Memory Tester for NVIDIA CUDA-Enabled GPUs

One of the members of the Folding@home team, Imran Haque, has developed a memory tester for GPUs. Here's a brief description:
MemtestG80 is a software-based tester to test for "soft errors" in GPU memory or logic for NVIDIA CUDA-enabled GPUs. It uses a variety of proven test patterns (some custom and some based on Memtest86) to verify the correct operation of GPU memory and logic. It is a useful tool to ensure that given GPUs do not produce "silent errors" which may corrupt the results of a computation without triggering an overt error.

Basically, the idea is that we wanted to put out a code to test GPU memory that's roughly equivalent to Memtest86 on CPUs. If you run FAH heavily on a GPU, it's a good idea to check out your GPU memory, just as one would run tests on CPU memory.
Available here:
Folding@home - Download MemtestG80 and other useful stress testing tools

And the rather lengthy and informative thread is here:
Folding Forum • View topic - Announcing release: standalone memory tester for NVIDIA GPUs

I would think that failures on this test would be sufficient grounds for RMA now that NVIDIA is partnered with the Folding@Home project. CUDA-enabled cards are sold with the folding clients as an install option on the driver disks now, so it is clear that NVIDIA supports the use of the client. There is already precedent on the forum that manufacturers are honoring failed results on this test as proof of defective cards, although it has not been officially stated.
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Last edited by ThunderRd; 23rd November, 2009 at 05:31 PM.
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