Two sticks of 512 RAM won't work

[KnightRider2000]

Ok, so i got a stick of 512 SD DDR RAM for Christmas (on top of the 512 I have in my PC). Both sticks have been tested separately on my PC and work by themselves. However, for some reason, my PC continuously restarts, right after the windows loading screen when I have both sticks in the slots. I only have 2 slots. Both sticks are IDENTICAL and are the same size/company/specs.

I'm running Windows XP Professional (Service Pack 2)

My motherboard is a PM800-M2, with the Phoenix-Award Bios.

Could it be something that needs activation in the bios? I searched and searched but could not find anything.

The manual for the MB can be located here:
http://www.ecsusa.com/downloads/pm800-m2.html

Any suggestions?

 

[kiyotaka]

hmmm

I'd make sure your motherboard supports two double sided sticks..



oh.. and to note Are you trying to run it in dual channel mode or something? If so disable that option in the bios. that can cause it if the memory hates each other..

troubleshooting ram is very hard to do.. Very hard to track down probs :/

 

[Mr Wizard]

I would also make sure that your MOBO supports a gig of ram. Its not rare but its alot of ram