Because i can clearly see bottleneck with Phenom II X4 965, when i was with Gigabyte R9 270 (witch i still have) - a game like Fallout 4 was running ultra settings (set by the game itself) and had no issues,but now with Gigabyte R9 290x game feels kinda laggy, even graphics card is twice as powerful as R9 270? so i made my mind and looked at forums about new CPU, i found that FX 8350 is best for gaming (like Phenom II x4 965 was the best in his days) so im asking will it bottleneck with R9 290x ?