Upgraded my R710 to X5675

I bought the x5690 but it could not boot :-( wasted $70. I bought the x5675 at $60 and it is working fine. The difference between the Gen 1 and Gen 2 R710 is the CPU TDP rating it can support. The Gen1 will not support processors with a 130W TDP whilst the Gen2 will. Basically anything higher than the X5675 (X5677, X5680, X5688, X5690) is not supported on the Gen 1. The Gen 1 will support Westmere providing your BIOS is of a new enough version to support (which if it had E5620’s, then it is).