For PC gaming purpose, going from 2.8 Quad to 2.66 Hex may decrease the performance due to lower single thread performance.
In fact, it's better to get a X5677, which will give you 3.46GHz (23.6% improvement) but 40% cheaper than the W3690, and way more cheaper than the X5690 at this moment.
Of course, for multi core performance, the X5650 is a little bit better, and only cost about 40% of X5677.
In fact, it's better to get a X5677, which will give you 3.46GHz (23.6% improvement) but 40% cheaper than the W3690, and way more cheaper than the X5690 at this moment.
Of course, for multi core performance, the X5650 is a little bit better, and only cost about 40% of X5677.