optiplex gx 620

Hey everyone, I have an ancient Dell Optiplex GX620 that I kind of want to upgrade for simple use. I've been using it with these specs for the past year and a half or so on Windows 10. RAM: 5GB CPU: Intel Core 2 Duo E6300 GPU: AMD Radeon HD 6450 MOBO: Optiplex GX620. Optiplex 745 This setup...

I know that it's motherboard supports Pentium D 800's, but I was wondering if it also supports the 900 series. If so does the BIOS need an update? And yeah I know this thing's <<Edited>> ancient. I already have a better PC so no need to lecture me on just buying a new PC lol.