Re: [AMBER] Wrong results in GTX TITAN, correct results on GTX580

From: ET <>
Date: Thu, 11 Jul 2013 15:52:04 +0100

That is very interesting Scott. So if it is heat related, then the water
cooled GPUs that Ross mentioned in another thread would avoid the errors?

On 11 July 2013 14:56, Scott Le Grand <> wrote:

> The problem with memtest is that it just exercises memory. Memory on its
> own is usually fine. What seems to be going on is that the memory starts
> giving errors when the GPU heats up the system while number-crunching. i
> have found all sorts of GPUs, from all AMBER-compatible generations, that
> pass memtest and even run n-body, only to blow up running JAC NVE. for 2
> minutes.
> We know Titan has issues and I suspect at least some 780s will as well.
> What's interesting is the people who have gotten around this by modding
> their GPU heatsinks and downclocking memory by a factor of 2. Not for the
> faint of heart, but a lot cheaper than buying Teslas. That said, I suspect
> the future lead to contexts where Teslas better prove their worth running
> Scott
> On Thu, Jul 11, 2013 at 5:05 AM, ET <> wrote:
> > I never got any memtest errors with my TITANS either, so it is a
> > combination of hardware and the CUDA code IMO,
> >
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Received on Thu Jul 11 2013 - 08:00:05 PDT
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