Kaccie,
That's a bummer.
FYI: The Dimension 8200 was built with two different motherboards, one version has the Intel 850 chipset, the other has an 850e chipset, best to try and match the version already installed.
The Dimension 8200 with a 850 Chipset and 400 MHz FSB processor will run with either 40 or 45 ns RDRAM, but the 850e Chipset with 533 MHz FSB processor requires the faster 40 ns RDRAM.
Bev.