I updated drivers and many other things.
The last thing I tried was to take out the 512 memory PC2700, which is what it was called for and put in my 256 that Best Buy took out when I updated to 512 and 256. There are only two slots, so I currently have two 256's in. They both are PC2700's. When I had the 512 and 256 in, my computer did recognize both, but when running 3d graphic with the 512 in, my computer would reboot.

I thought it may have been the 512 a month ago so I had them replace it with a new one. My computer says it will go up to 1g.
I hope I do not have to stick with the two 512s but I don't know what to do.
Any suggestions that I'm missing. I know I may not have wxplained this as clearly as I should have.
Thanks,
Tom