Finally got my Xeon e5649 over 4.2 GHz! Temperatures and stability aren't great, but good enough for a run of Cinebench. : r/overclocking
Intel Xeon E5649 - AT80614006783AB / BX80614E5649
LOT OF 2 - HP Intel Xeon E5649 2.53GHz BL460C G7 Six Core - 637441-B21 Processor | eBay
Intel Xeon E5649 2.53GHz Six Core (AT80614006783AB) Processor for sale online | eBay
IntelÃÆ'ƒâ€šÃÆ'‚® XeonÃÆ'ƒâ€šÃÆ'‚® E5640, 4 core, 2.66GHz Processor SLBVC (B-Grade) - Central Valley Computer Parts