I upgraded my RAM this evening form 512 of I think PC2700 mb to 2 gb of PC2100 (more of an upgrade of volume, I guess).

My Asus P4P800 Deluxe manual says ""Dual channel memory architecture. Supports PC3200/2700/2100 unbuffered non-ECC DDR DIMMs. 4 x 184-pin DDR DIMM sockets for up to 4 gb memory."

Here is a link to the eBay auction I purchased this RAM from.

They are two-sided modules, and my previous ones were single-sided, but I've read that doesn't matter. So I went along with it. I don't know if that's the problem or not...

On startup, the pc checks the RAM and outputs "2048 mb RAM ok"

On the first time, It reached the sign-on screen, and loaded Windows and it worked for about 5 minutes until freezing point. Then I restarted it, and it froze after 1 minute. Final time, it froze after a few seconds, then everything turned off except the fans.

Any clues? Thanks in advanced.

Hi Try removing your existing RAM and just runn the new stuff to see if it boot properly it could be a compatablity issue with the RAM

I had removed the old 2 x 256 mb of RAM, and installed the new 4 x 512 mb of RAM, so just the new modules are in on that pc right now.

Ok it seems as if one of the RAM stick is faulty try running 2 of the new ones by them self if it still freezes try the other 2 new sticks by them selfs it will be a process of elimination here to work out which stick is faulty

Alright, will do. I don't have much time right now to do it, so I will have to get back to you tomorrow.

Thanks for the quick replies, madmatt2006

No problems glad to help