Right general specs are...
Intel Dp35dp mainboard
Core 2 Duo E6600
4 SATA disk drives & 1 SATA DVD drive
Asus 8600GT silent graphics card
and most pertinently four 1GB patriot pc-6400 DDR-800 DIMMS
I have all four DIMM slots on the mainboard populated for a total of 4GB running in dual channel mode.
My problem began with random instability problems in Windows Vista 32-bit. Basically the system dies, everything goes blank, the fans turn off, everything, and then it restarts by itself. As far as I can can tell there was no reason behind the crashes. After restarting, Vista's event logs only record that a disruptive shutdown has occurred, and they record no OS or hardware errors. Also this may be related; after several attempts I have been unsuccessful at installing the 64-bit version of fedora 7.
Now at first I suspected the power supply or some piece of hardware overheating. As far as I can tell from Intel's monitoring software this is not the case. The voltages supplied to the mainboard remain stable under all conditions, not showing a characteristic drop under load in voltage of a failing power supply. Nor are any of the temperatures being reporting outside of normal operating ranges.
At this point I double checked that all my drivers were up to date, they are. I also ran nvidia's ntune graphics stress test for 60 minutes to see if anything cropped up in that short time frame, the system remained stable. Next I tried prime95. I first ran two instances on separate cores of prime95 that only stressed the processor for 1hr 30 minutes, that ran fine. Next I ran a processor/memory stress test on one core, and an in place cache test on the other core, within 3 minutes this caused a system crash like I had been having. Prior this crash there was no drop in voltages nor dangerous spike in temperatures. Next I tried Vista's memory diagnostics, so far I have been unable to get the computer to complete them, the system shutdowns by itself before they complete.
Now I tried the same process (running the prime95 memory test) only using 2 memory dimms installed rather than four, and the system remains stable. Now here is the wierd thing, the systems seems perfectly stable no matter what combination of two dimms I use, just as long as I have only 2 memory dimms installed and not 4. If one set of two dimms worked fine and the other didn't I would blame it on the memory and return it as defective, but all of my memory seems to work fine just as long as I don't use it all together.
Any ideas?
Intel Dp35dp mainboard
Core 2 Duo E6600
4 SATA disk drives & 1 SATA DVD drive
Asus 8600GT silent graphics card
and most pertinently four 1GB patriot pc-6400 DDR-800 DIMMS
I have all four DIMM slots on the mainboard populated for a total of 4GB running in dual channel mode.
My problem began with random instability problems in Windows Vista 32-bit. Basically the system dies, everything goes blank, the fans turn off, everything, and then it restarts by itself. As far as I can can tell there was no reason behind the crashes. After restarting, Vista's event logs only record that a disruptive shutdown has occurred, and they record no OS or hardware errors. Also this may be related; after several attempts I have been unsuccessful at installing the 64-bit version of fedora 7.
Now at first I suspected the power supply or some piece of hardware overheating. As far as I can tell from Intel's monitoring software this is not the case. The voltages supplied to the mainboard remain stable under all conditions, not showing a characteristic drop under load in voltage of a failing power supply. Nor are any of the temperatures being reporting outside of normal operating ranges.
At this point I double checked that all my drivers were up to date, they are. I also ran nvidia's ntune graphics stress test for 60 minutes to see if anything cropped up in that short time frame, the system remained stable. Next I tried prime95. I first ran two instances on separate cores of prime95 that only stressed the processor for 1hr 30 minutes, that ran fine. Next I ran a processor/memory stress test on one core, and an in place cache test on the other core, within 3 minutes this caused a system crash like I had been having. Prior this crash there was no drop in voltages nor dangerous spike in temperatures. Next I tried Vista's memory diagnostics, so far I have been unable to get the computer to complete them, the system shutdowns by itself before they complete.
Now I tried the same process (running the prime95 memory test) only using 2 memory dimms installed rather than four, and the system remains stable. Now here is the wierd thing, the systems seems perfectly stable no matter what combination of two dimms I use, just as long as I have only 2 memory dimms installed and not 4. If one set of two dimms worked fine and the other didn't I would blame it on the memory and return it as defective, but all of my memory seems to work fine just as long as I don't use it all together.
Any ideas?
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