Summary: Upgrade for my EVGA SR-2 from Xeon E5620s. 6 cores/12 threads vs 4/8 on the E5620. When these processors were not end of life (most socket 1366 Xeon prefixes X/W/L/E are EoL. X = Performance, W = Workstation, L = Low Power, E = Mainstream Rackmount.) they cost $1,000 a pop. Indeed, my E5620s cost me around $450 each. I bought this X5650 for merely $100, a 90% savings. Epic upgrade for older motherboards, especially when one can overclock these older Xeons.
Summary: I bought two of these. I couldn't believe the quantity that was displayed on my Task Manager - 24 cores!!! I have a SuperMicro xadah+-f mobo, 4 MBF2300s running in RAID 0. Very few can do what this dual CPU & board can do. I went overkill for my needs, but hey, bad boys and their toys. No probs what-so-ever.
Fast and reliable, and also very fast. Did I say it's fast?
6 April 2014
Summary: Fast processor for an ageing workstation, best if mounted in pairs. Reliable performance with basically any threaded workload you can throw at it. Not so brilliant on single threaded loads, such as emulators and most games. If you work with 3D rendering, simulations, video editing, virtualized machines and such then you'll have very solid performance for the bucks.