Just to follow up - after pulling the machine apart and then trying a 9800 GT and GT 220 (8th and 9th gen) and getting no problems I reinstalled the GTX 480. At first it was stable, then unstable with my code, then later stable again (and stable since).
I suspect I may have had a hardware issue (perhaps a noisy connection? a hair? a microfracture?) but I'm pretty sure I was passing around incompatible memory (e.g. doubles in place of floats) which presumably will corrupt things pretty quickly. This didn't upset the GT 220 (9th gen with double(ish) support) but maybe the new NVIDIA drivers for Fermi are less stable. Anyhow - it works most of the time now. The only thing that crashes it now is s...@home (every 30-60 mins) but other GPUGrid projects which use the Fermi are just fine. I'm chalking this up to the 'joys of first gen hardware'. i. On 29 June 2010 15:37, Ian Ozsvald <i...@ianozsvald.com> wrote: > 750W - the machine was built specifically as a "higher-end gaming > machine" (from a consumer-level PC supplier) - but built for the > office for physics simulations. i3 2.9GHz CPU, 4GB RAM, GTX 480 card, > no other hardware. > > The machine is open (has been since Monday evening), I've been > measuring temperatures (48 degrees C at idle, 82 degrees C under 95% > load for 30 minutes) and nothing seems out of the ordinary. > > I can run the Nvidia SDK sample programs (e.g. particles, smoke, > waves) and as long as they start, the machine is fine. The problem is > when one of them freezes upon start-up (just as my pyCUDA programs can > freeze on start-up). The machine can be freshly booted and old or > having been under stress for an hour, there's no obvious pattern to > when it will freeze. > > I've switched back to my older 9800GT machine which has 197.45 > drivers, I'll upgrade that shortly to the latest drivers to see if > that causes instability. > > Right now I'm trying to finish some logical patches for pyCUDA before > I'm done with this client for the week. > > i. > > On 29 June 2010 14:40, Bryan Catanzaro <bryan.catanz...@gmail.com> wrote: >> What kind of power supply do you have? >> >> - bryan >> >> On Jun 29, 2010, at 1:43 AM, Ian Ozsvald <i...@ianozsvald.com> wrote: >> >>> Does anyone here successfully run Win XP with a GTX 480 (or 470) with >>> CUDA 3.0/3.1? >>> >>> I upgraded from a 9800GT to the GTX 480 last week (with a whole new >>> machine) and the new machine is very unstable, I'm trying to identify >>> whether it is a hardware issue or the relatively recent drivers from >>> Nvidia. On Friday it hung twice, yesterday it hung 12 times. >>> >>> By 'hung' I mean that if I run the CUDA test programs (from the SDK) >>> then when the program starts - about 1 start in 5 - it'll cause the >>> machine to hang. With pyCUDA it seems to occur more frequently (but >>> maybe this is due to chance) - it happens for test programs (e.g. >>> dump_properties.py, test_gpuarray.py) and my mandelbrot.py demo - all >>> programs seem to cause the crash (but only when the program first >>> starts, if it runs ok then it'll keep running fine). >>> >>> I'm hunting around on the web but I'm not finding any similar >>> problems. This occurs with the latest NVidia drivers (257.21) and CUDA >>> 3.0, also with CUDA 3.1 (in fact the machine seems less stable with >>> CUDA 3.1 - I'm about to downgrade to confirm this). >>> >>> Has anyone seen these kind of symptons before? >>> >>> Cheers, >>> Ian. >>> >>> -- >>> Ian Ozsvald (A.I. researcher, screencaster) >>> i...@ianozsvald.com >>> >>> http://IanOzsvald.com >>> http://morconsulting.com/ >>> http://TheScreencastingHandbook.com >>> http://ProCasts.co.uk/examples.html >>> http://twitter.com/ianozsvald >>> >>> _______________________________________________ >>> PyCUDA mailing list >>> PyCUDA@tiker.net >>> http://lists.tiker.net/listinfo/pycuda >> > > > > -- > Ian Ozsvald (A.I. researcher, screencaster) > i...@ianozsvald.com > > http://IanOzsvald.com > http://morconsulting.com/ > http://TheScreencastingHandbook.com > http://ProCasts.co.uk/examples.html > http://twitter.com/ianozsvald > -- Ian Ozsvald (A.I. researcher, screencaster) i...@ianozsvald.com http://IanOzsvald.com http://MorConsulting.com/ http://blog.AICookbook.com/ http://TheScreencastingHandbook.com http://FivePoundApp.com/ http://twitter.com/IanOzsvald _______________________________________________ PyCUDA mailing list PyCUDA@tiker.net http://lists.tiker.net/listinfo/pycuda
