One runs at 815 while the other runs at 810 that is a less than 1% difference of speed.
As for coolers I don't have personal experience with either one, so I don't know which is better. That said these cards pretty much appear to be the best on the market for their respective brands. Both are 7 phase and both have voltage control. You may be able to overclock it past the 810 speeds to the high 800 range. That said I ain't that keen on overclocking video cards to extreme speeds a few percent that you won't see without a benchmarking program is not worth dealing with stability issues.
The most important thing you should be looking for these two cards are noise levels. That said I won't be able to give you that information without seeing reviews of these cards. I don't know which of these two cards are going to be more silent.
Here is a similar thread with someone who is retiring there 8800gt. He has a q6600 which is OC instead of an e8400
http://hardforum.com/showthread.php?p=1036494280
Here is a 12 page thread about peoples experience with there 460.
http://hardforum.com/showthread.php?t=1532953
You will be fine with either
As for coolers I don't have personal experience with either one, so I don't know which is better. That said these cards pretty much appear to be the best on the market for their respective brands. Both are 7 phase and both have voltage control. You may be able to overclock it past the 810 speeds to the high 800 range. That said I ain't that keen on overclocking video cards to extreme speeds a few percent that you won't see without a benchmarking program is not worth dealing with stability issues.
The most important thing you should be looking for these two cards are noise levels. That said I won't be able to give you that information without seeing reviews of these cards. I don't know which of these two cards are going to be more silent.
Here is a similar thread with someone who is retiring there 8800gt. He has a q6600 which is OC instead of an e8400
http://hardforum.com/showthread.php?p=1036494280
Here is a 12 page thread about peoples experience with there 460.
http://hardforum.com/showthread.php?t=1532953
You will be fine with either
Hardware Q for Roland - Considering two GTX460s.
- 30/11/2010 05:08:45 PM
482 Views
I need to learn more about hardware.
- 30/11/2010 05:56:18 PM
494 Views
Either will work
- 01/12/2010 12:25:29 AM
559 Views
I ended up going for an MSI Hawk 1gb 460 that was on sale for $159 after discount & rebate.
- 04/12/2010 08:23:15 PM
380 Views
...aaaand an RMA. 
Makes a chirping noise and has occasional artifacting. *NM*
- 08/12/2010 08:34:02 PM
194 Views
Makes a chirping noise and has occasional artifacting. *NM*
- 08/12/2010 08:34:02 PM
194 Views