Well that's funny, it's the same type of RAM I have, KVR1333D3N9K2/4G
The internal code is 99U5403-003.A00LF, this identifies what kind of chips are used.
What can I say my system is very stable, I never had any reboots whatsoever.
A few things you could check:
- Make sure the BIOS is updated to version 0028, it is the most stable, see previous posts
- The processor is not over-clocked: bus is set at 133mhz
- The RAM is set at 1.5v and is not over-clocked: running at 1333mhz
- Test the RAM with http://www.memtest.org/ Leave it running overnight, if any errors come up it could mean the RAM is defective
- The processor is not over-heated: temperature always below 65C, cpu cooler properly installed with thermal paste and all 4 pins "clicked"
- Test the processor with http://www.mersenne.org/freesoft/ Leave it running overnight, if any error comes up it means the processor is not properly cooled
- Check all BIOS settings and remove all options you don't need, even though this is very unlikely to cause reboots
- If you have a discrete graphic cards remove it and try using the graphics integrated in the processor
- if you have another PSU at hand try to swap it with the current one