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HD5770 cossfire vs Single 5770

I'm wondering how much of a framerate boost I will get by putting in a second HD5770, while I currently have just one. My current mobo doesn't support crossfire, but when I get one that does, a second 5770 is probably going to be on the top of my list.

Here's my specs:
Intel Core 2 Quad (Q6600) 2.4GHz
msi R5770 HAWK (ATi R' HD 5770)
TR2 600Watt PSU
4GB DDR2 RAM
p5kpl-cm mobo
149gb (160gb) & 931gb (1TB) Satas, both 7200rpm
Windows Vista Home Premium 32bit

For a gaming PC, It's not very good, but BF3 Beta is maxed out at 30-50fps. (Except AA and Shadows on High, not Ultra)
4 answers Last reply Best Answer
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  1. Best answer
    You wont get double the performance, but it will definitely improve. Just make sure your PSU can handle 2 5770's.
  2. for the price of another 5770 and CF mobo get a better video card 6870 should be a good upgrade id say on par with 5770 CF better in some cases and not as good in others.
  3. Best answer selected by gunmetaltrevan.
  4. This topic has been closed by Mousemonkey
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