This is quite a funny story really, I changed the CPU in one of my Thinkstation S30 machines, and then changed it back. So I thought I'd take some pictures along the way. The original CPU was a XEON E5-1620 and on eBay I "scored" a really good deal on a couple of E5-2640 processors. The E5-1620 being a quad core, and the E5-2640 a hexa core, or six cores. I made the assumption that the latter was faster, and swapped the CPU.
More about that after the pictures to swap it back.
A lesson learned, well, two lessons learned regarding Intel processors. Six core, twelve thread processors are not necessarily faster than four core, eight thread, especially when the base clock speed is taken into account. It is also worthy of note to check the "single thread" performance of the new CPU.
The pictures show original heatsink, then removed with E5-2640 with (quite new) thermal compound on, then the two levers unlocked to release the CPU cage and the E5-1620 re-installed, with new thermal compound. The heat sink and fan re-installed and then a check with CPU-Z to see if all is well.
A quick note, changing these processors is not for the faint of heart, or those with shaking hands and bad eyesight...
If you compare the two CPU versions, the overall performance of the E5-2640 may, on first review, seem better than the E5-1620, however, on closer inspection, the latter is the better CPU.
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