Random reboots

[tms1337]

Specs:
nForce2 mobo
AMD Athlon XP 3000+
nVdia GeForce 4000+
1 CDRW Drive
1 gig DDR RAM
160 MB Maxxtor HD

Two days ago i reformatted my hard drive. All was well when i was installing all of the updates/drivers etc. But then, seemingly out of nowhere, my computer started randomly rebooting itself....right after the reformat, i added a second 512 mb stick of ram. it seems to work fine if I just use the internet and non hard workign things like that. but when i go to play counter strike source, it always freezes sooner than if I hadnt played...

before all of this, ive never had any problems. Previously, my VDD power voltage was low and in the red. I unplugged one of my older CDRW drives and now the power is at normal. im not sure if its a hardware problem, software, or my power. Whats the deal here, and how can I get rid of this?

 

[tms1337]

I ran memtest86 and one piece of RAM came back with like 15 errors...the other 2 came back with 5. (mostly on test 8.)


Besides the RAM, theres no other reason it should be rebooting...

but the thing is, when I put one stick in, it works fine. with 2, I get problems..doesnt mater which stick is in.

 

[mdd1963]

Try just one stick of RAM at a time, and try another known good ATX power supply if you can borrow one to test...

(Are the mem sticks in approved dual channel slots, if applicable?)