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FPS improvement with Crossfire vs single card

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Profile: enthusiast
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I will have the opportunity to upgrade my system.  I am thinking of getting a MoBo that supports Crossfire and getting another HD3870.
 
What kind of FPS improvement can I expect?  Is it game specific as to the improvement?  Say like CS Source vs Crysis (dont play it yet) or a game sitting on my desk that I havent installed, Neverwinter Nights 2????
 
Will 2 HD3870's be chocked by my CPU?
 
Thanks for your input!


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Q6600@ 3.60GHz(9x400) Abit IX38QuadGT,TRUE 120 Lapped,Vista Ultimate 64bit,Gigabyte HD 3870 OC'd to 860/2250 w/ Zalman Fan,4x1GB Crucial Ballistix (4,4,4,12),CM690 w/ 5x140m 3x120m fans,Idle 38c load 55c-Corsair HX620w
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Profile: addict
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No it won't be choked. Well you will get a improvement, the highest in titles like COD4, HL2.
Maybe at least 50% I will warn you, sli and crossfire sucks in crysis.


Message edited by aznstriker 92 on 03-08-2008 at 01:07:07 AM

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