on second thoughts i was actually going to go for the dual core and i realised X2 3600+ is not supported, the 3800+ is supported but i cant find that anywere.
i just saw this one on ebuyerAMD Athlon 64 3800+ Socket 939 (2.4GHz) OEM Processor
http://www.ebuyer.com/product/125396 which is faster than san diego, will i need to do a bios update with this one?