Have you tried both 512 sticks individually to verify that they both work
individually. Had this same problems with 2 memory 512 and could not get
one to work with my computer come hell or high water. One worked
flawlessly. The chip that did not work under xp works fine on a windows 98
machine. If they both work individually then it may be a possiblity that
the timeing or density between the two chips do not function. Memory is
sometimes non working in combination with no explanation. If possible you
could have a friend try them in his or her computer for a more definite
solution. Hopfully you purchased them the same time in matched set.


wrote in message
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Okay, i've just recently gotten my 2 sticks of 512 pc2100
ddr ram. When I placed both stick's in and seated them
firmly down. I booted, it wet past post and then it came
to the next part where the window's xp loading appears.
Instead of seeing that all I saw was a blank screen.

Okay so i rebooted and tried safe mood, nope stick's during
the boot up process. I know the motherboard is seeing both
sticks cause the memory read out say's the total amount
that I placed in it. Yes my mother board supports 1gig of 2
sticks of pc2100 ddr ram. So I don't believe it's a
mainboard problem.

If I take out one stick it runs fine. I also have one
stick of 256. Which when i stick it in boot's with one
stick of 512 it works show 768 total. was wondering if this
is a problem. haven't seen it anywhere I know xp can handle
more then 1gig. :P Any help would be appeaciated.