I refer to my results at 'http://www.gpugrid.net/results.php?userid=10711'

My graphics driver just restarted (screen going blank then when it comes back a message bubble pops up) and indeed this just happened again while writing this message. Looking at the task type, it was a GIANNI this time, so rather than blaming the IBUCH as I was going to, I think I'm going to suspect the CD I'm ripping to MP3.

The CD ripping is hogging one of my two CPU cores - and with BOINC running CPU tasks too I could hear the fan on the gfx card spinning down and up again, as if it was not getting sent enough work. However BOINC CPU tasks have process priority 4 and acemd has priority 6, so you would have thought that the CUDA app would have taken priority on the non-CD-ripping core.

Maybe there was memory congestion? Who knows.

Anyway, probably not best to run CUDA apps while ripping CDs... (p.s. I have burnt at 4x before with BOINC running, but CDs read at 48x so it may be more strain)

I also have one of the ridiculously long tasks that was cancelled. Seems to have claimed 45k credit but been granted none?

My fubar WU's outnumber my successful ones by 4 to 1, so GPUGrid has seen the last of me after this batch or work until it becomes more stable. Seti CUDA work never seems to fail, maybe 1 in 100, whereas GPUGrid seems to be 4 or 5 fails for every success, and it usually fails after 12-16hrs crunching.

Hmm how fascinating. I wonder which card you have.

My 8800GT's been crunching for about 3 months, 24-7; there were some problems relating to a bug in Nvidia's CUDA drivers (being a relatively new technology), but apart from that, nearly all of my tasks have succeeded. It's just today, on diff tasks so I think it's probably my computer being weird.

For the 200 series, you can see in other posts that people have been having trouble with different driver versions - I've played it safe and haven't 'upgraded' my drivers while it's working fine.

People will tell you to check any overclocking etc, but if you know what you're doing I assume you've checked that.

Hi,

To be honest, I actually had the fan on constant, but I was trying to communicate best as I can...I actually saw the temperature graph going up and down in hills. (that wasn't so hard, should have just said that lol). I have Rivatuner set up so that I leave it at the highest fan speed that doesn't bother me, and then it downclocks from 120% clocks to 100% if temp goes over 78, 100% to 75% if temp goes over 80 etc.
So at a constant fan rate, it looked like the GPU was only getting work periodically, i.e. the temp would go up to 78, then drop off for 15 seconds or so, then would get more work and the temp would rise again.

CDex always seems to hog the computer a bit even at normal priority. Maybe it's something to do with data transfer but I thought CD drives are on the southbridge while the GPU is on the northbridge right?

It happened shortly after a restart; I usually leave my PC crunching 24-7, but gave it a restart, and after some web browsing, started ripping some CDs, with BOINC going. Halfway through the first CD the screen blacked out (with just the cursor left)

I did actually try ripping the 3rd CD with BOINC going, to see whether it was consistent, but it was fine! (if that had problems i might have fingered the power supply)

Note that I haven't really had any problems before, apart from that FFT bug in the drivers you had trouble with and once when I tried to run another CUDA app at the same time.
It's working now, I'm not too fussed.

I actually go by core temp - RivaTuner only checks in the up direction to downclock, and the upclock threshold is much lower, to avoid oscillating temperatures/clocks. Interesting theory about the changing of clock speeds causing the problem, though it probably happens about twice a WU (if it's a hot one) and hasn't caused problems before.

More likely that something in the system got messed up I guess. If something happens again I will take your advice and check whether the clock speed could have changed shortly before. Think it's unlikely, but then again that's how we discover such correlations, by checking.

btw CDex on my system does hog a whole core, but your system is probs beefier than mine. Mine was handed down (great - I don't have to buy one myself!) so it's about 2 years old now, with a 2.4Ghz E6600 Core 2 processor. The processor speed is enough for me - games are mostly GPU-bound and I don't tend to rip or transcode often.

Thanks for your posts.

http://www.gpugrid.net/result.php?resultid=900065

# Encounter 10-12 H-bond term
WARNING: parameters.cu, line 568: Found zero 10-12 H-bond term.
WARNING: parameters.cu, line 568: Found zero 10-12 H-bond term.
Cuda error: Kernel [mshake_position] failed in file 'mshake.cu' in line 146 : unknown error.

http://www.gpugrid.net/result.php?resultid=897315

# Encounter 10-12 H-bond term
WARNING: parameters.cu, line 568: Found zero 10-12 H-bond term.
WARNING: parameters.cu, line 568: Found zero 10-12 H-bond term.
MDIO ERROR: cannot open file "restart.coor"
Cuda error in file '..\cuda/cutil.h' in line 982 : unknown error.

http://www.gpugrid.net/result.php?resultid=883059

# Device 0: "GeForce GTS 250"
# Clock rate: 1836000 kilohertz
# Total amount of global memory: 536870912 bytes
# Number of multiprocessors: 16
# Number of cores: 128
# Device 1: "GeForce 9800 GTX/9800 GTX+"
# Clock rate: 1836000 kilohertz
# Total amount of global memory: 536870912 bytes
# Number of multiprocessors: 16
# Number of cores: 128
Cuda error in file '..\cuda/cutil.h' in line 982 : unknown error.
____________