Hello all, I am trying to tweak the last amount of performance out of my system. Unfortunately I have a motherboard with a 750FX North but the 600 South. Full specs are listed under my avatar. From other forums I gather that having an increase in frequency is more important than increasing the number of cores. As I let the computer work through the night for rendering and downloading, 4 cores are not a big concern. The 550 is already rated at 3.1 which is only .1 off of the fastest I can get my 6000 up to. Many people have reported the 550 at 3.8 stable. I can also get the 550 at a cheap price and free shipping. I do loose 1MB of Lvl 1 cache, but pick up 6MB of Lvl 3. If I can achieve 3.8, it will bring my memory to 475 from 402. I seem to recall that I have had it that high before and it was stable. I think it started to crash around 483. Base Question. Do you think I would see an improvement of say 10-15% with this swap? Thank you for the help.