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New ATI Upgrade

Recently I had to upgrade my power supply because the fan in my old one somehow decided to start rubbing against the side of the power supply and soon shatter, so I had to go ahead and buy a new, better, power supply.

http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=10009035
That is my power supply

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128387
That is my motherboard


http://www.newegg.com/Product/Product.aspx?Item=N82E16814102847
That is my *CURRENT* video card.


Anyways, the deal is that I'm a solid MW2, Dirt 2, and Bad Company 2 player.. 2 out of 3 of my favorite games have DX11 support, so I am going to upgrade to one of the new ATI cards, my only hold back is I am not sure whether it is better for price/performance to get two 5770's, or a 5850.
I have two monitors, 25" and 22", they run at 1920x1080 and 1680x1050. I only play on one monitor (obvious) and use my secondary for multitasking. I'm powering this with an AMD 940 Phenom II


Does anyone have any suggestions?

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150477&cm_re=Radeon_5850-_-14-150-477-_-Product
If I get a 5850, this will probably be it.


http://www.newegg.com/Product/Product.aspx?Item=N82E16814150447&cm_re=Radeon_5770-_-14-150-447-_-Product
Or I could get maybe two of these?


I'm not too savvy when it comes to video cards, does anyone have any suggestions? I'm not sure what is better for performance: two 5770's or a 5850

Please help me out here

also I'm not sure if my MOBO can support crossfire 5770's
8 answers Last reply Best Answer
More about upgrade
  1. 2x 5770 rivals 5870 in performance. A HD5850 would though leave your second slot open when the need arises fore an upgrade down the line.
  2. 2xHD5770 in Crossfire will perform better than a single HD5850.
    http://www.legitreviews.com/article/1105/5/
    I can not find reviews that contains your favorite games but I think this benchmark will be about the same.
  3. Are you guys sure that my Power supply and motherboard will support two 5770s?
  4. Your mobo will run 8x8 crossfire (not a problem with 5770). Your power supply is bigger than the requirement for 2 xHD5770 in crossfire.
  5. should i upgrade my motherboard for full performance? (just upgrading to a different ddr2 mobo with 2x pci-e x16 slots)
  6. Best answer selected by jyncduncan.
  7. thank you rolli, this is the second time you have helped me out tremendously.
  8. Best answer
    No it is not worth the cost. The only cards that get slightly bottle-necked by the 8x speed are the most powerful ones like HD5970.
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