UPDATE: I bought this upgrade and installed it, and it works nicely. If you want to see some benchmarks to see how old skool hardware handles modern loads, see my later posts! Original post As you can see from my signature, I have a very old dual-socket Xeon workstation (picked up free when they were throwing them out at work, score). I'm thinking of upgrading the processors, since you can get old Xeons mighty cheap on eBay- apparently this motherboard is good up to 3GHz, and a 50% performance boost would help make it a bit more useful. I have a question however- will the Gallatin Xeon MPs work in a motherboard designed for Prestonia Xeons? They're both Socket 603 with a 400MHz FSB, but I'm not sure whether the board would fail to recognise them- and their 4MB L3 cache. Anyone got any advice?