There has been much debate on this issue of which of these two CPUs would make the better upgrade. Arguments have gone back and forth. The consensus seemed to be that the E8400 would be better for gaming whereas the Q6600 would excel in video editing.
I originally decided to go with the E8400 as an upgrade from my E6400. I figured that it would provide more advantage in most applications if I could get a 4.2 Ghz overclock over the Q6600 @ 3.6 Ghz. After receiving the E8400, I wasn't all that impressed with the performance increase over my overclocked E6400 so I decided to go with the Q6600 and return the E8400. Before sending it back however, I decided to do some benchmarking to make sure I was going with the better processor. Hopefully, this helps others who are also debating which processor to go with.
My test platform for the gaming benchmarks was an Asus P5E-VM HDMI, 2 gigs of Crucial Balistix 4-4-4-12 with Windows Vista Ultimate so I could take advantage of DX10.
The test platform for the video encoding and DVDShrink was my old P5B Deluxe Wifi/AP, and 2 gigs of Corsair Dominator 4-4-4-12.
I used an 8800 GT Superclocked for all the tests.
From the Crysis results, its apparent that CPUs don't really have a significant impact in performance but that the bottleneck still lies on GPU performance. In other words, for modern games, these two CPUs are going to be comparable with an exception of games like Supreme commander that take advantage of four cores.
I originally decided to go with the E8400 as an upgrade from my E6400. I figured that it would provide more advantage in most applications if I could get a 4.2 Ghz overclock over the Q6600 @ 3.6 Ghz. After receiving the E8400, I wasn't all that impressed with the performance increase over my overclocked E6400 so I decided to go with the Q6600 and return the E8400. Before sending it back however, I decided to do some benchmarking to make sure I was going with the better processor. Hopefully, this helps others who are also debating which processor to go with.
My test platform for the gaming benchmarks was an Asus P5E-VM HDMI, 2 gigs of Crucial Balistix 4-4-4-12 with Windows Vista Ultimate so I could take advantage of DX10.
The test platform for the video encoding and DVDShrink was my old P5B Deluxe Wifi/AP, and 2 gigs of Corsair Dominator 4-4-4-12.
I used an 8800 GT Superclocked for all the tests.






From the Crysis results, its apparent that CPUs don't really have a significant impact in performance but that the bottleneck still lies on GPU performance. In other words, for modern games, these two CPUs are going to be comparable with an exception of games like Supreme commander that take advantage of four cores.