I just brought the 560 Black edition Newegg.com - AMD Phenom II X2 560 Black Edition Callisto 3.3GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Desktop Processor HDZ560WFGMBOX for $89 on saturday. Now I see that the x4 840 AMD Phenom II X4 840 3.20 GHz Review - Page 1/12 | techPowerUpis on sale for $59. Which would be a better buy. I have unlocked the 560 to 4 cores but it stills only gets a windows performance rating of 6.6 and have read that the x4 840 gets about 7.3. Any opinions on this?