worth upgrading from e6400 to e8400?

i have my e6400 chip overclocked to 2.66ghz, so would i see a significant increase in performance in games like Crysis and Unreal Tournament 3 if i were to upgrade to an e8400?

i'm also using 3 gigs ram, and 8800gt video card.

yes!

you need to right mobo to get the 4ghz

i run e6400 and e6420's at 3.4ghz = 425fsb with 1066 ram

drop in the E8400 and run 4.2ghz!

even if you ran your cpu at 3.4ghz you want the E8400 - i have one running at 4.2ghz. its much much faster!

even at 4.25ghz its not much hotter then 6000's at 3.4ghz

I would say it's worth it as long as your motherboard and ram are up to the higher fsb speeds. From what Ive seen most will hit 3.6 (400 fsb) with stock volts and heatsink. with a moderate bump in volts and good cooling 4.0 (450 fsb) is quite realistic. Going above that depends on how good of chip you get and how much voltage you are willing to give it.

I have a decent chip and can do 4.05 @ 1.26 vcore and 4.2 @ 1.32 (which is about as high as I feel comfortable with).

I really doubt that considering the 2m vs 6m cache and added memory bandwidth of the 8400 along with the other minor tweaks Intel made to the core. Also why would you compare an OCd chip to a stock one. If a person is going to clock one they will most likely clock the other also. Getting the 8400 to 3.6~3.8 is no harder than setting the fsb 400~422 (as long as MB and ram are up to it).

Here is a page from Xbits review of the new Wolfdale chips which shows some of the gaming differences. And remember the 6850 and 8400 are the same clock speed and that the 6400 has half the cache of the 6850.
http://www.xbitlabs.com/articles/c [...] ale_7.html