Summary: I was shipped the wrong product. For anyone out there who are familiar with computers, you know that a processor for your computer and motherboard have to be EXACT. Then, after recieving the product, I was told there was a no return policy. If I could give this merchant a 0 star, I would have.
Summary: I bought this for because my processor was failing. shipping was fast and was safely arrived to my house. For a used CPU it was AWSOME!!! It was a really good upgrade from my failing CPU (Athlon 64 x2 5000+). Take care in mind that this is a WINDSOR CPU and check to make shure your pc is compatible. over all, best used product I've ever bought! Runs cool with my new heatsink/fan (30 to 35 C on idle).
Summary: I swapped out the stock AMD Athlon 64 X2 3800+ for this 5600+. My Win 7 WEI jumped from a 4.7 score for my CPU to a 5.9. This also boosted my RAM WEI from 4.7 to 6.4. My E521 really performs much faster overall. I uninstalled iTunes and all my music files, reinstalled fresh iTunes and added the music files back. iTunes really, really performed much much better. The MP3 to AAC file conversion was truly rapid.