Which of these two cards is better?

The 6850 and an overclocked 7770. pls halp thank u my psu is 450w btw

6850: http://www.microcenter.com/single_product_results.phtml?product_id=0354216

Overclocked No
Core Clock Speed 820MHz
RAMDAC Clock Speed 400MHz
Stream Processors 960
Memory
Video Memory 1024MB
Memory Type GDDR5
Memory Clock Speed 1050MHz (4200MHz Effective)
Memory Bus 256-bit
Memory Bandwidth 128GB/sec

vs

7770: http://www.microcenter.com/single_product_results.phtml?product_id=0385588

Overclocked Yes
Core Clock Speed 1100MHz
RAMDAC Clock Speed 400MHz
Shader Clock 2200MHz
Stream Processors 640
Memory Clock Speed 1050MHz (4200MHz Effective)
Memory Bus 256-bit
Memory Bandwidth 128GB/sec
General
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More about which cards better
  1. didn't that crazy English guy with the crooked teeth over at overclock3d do a video tut on this a while back ?........... actually his tutorials/reviews are pretty good.
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