Can the kn8 sli support crossfire

[arsenalgamer]

hello peeps im mike
i have the following computer system
op-system winows 7 ultimite 64bit

a kn8 sli 939 socket motherboard w/ athlon64 x2 +4200 (overclocked at 2.5gz from 2.2)
memory- 3->512mbs kingston ddr400 and one 1gb kingston ddr400 (2.5gbs total) setting at 333mhz
(for some reason when i run cpu-z it reads @ 200mhz)-->sub question how do i fix this???
video card-a pci-E msi ati radeon R4550 (memory size 1gb) (memory bus 64 bits)
im tring to run crysis warhead on maxium settings but its choppy so i figuered maybe another r4550on crossfire will work.... some help please
main question can i use crossfire setup on an sli motherboard

 

[megamanx00]

First of all, that board is an SLI board and cannot do crossfire without modified motherboard drivers. Second, even if you were to run two 4550s in crossfire the performance would still be too low to play the game on anything above low settings.

 

[megamanx00]

^Well o.k, you could probably do low-med at something like 1024x768 with two 4550s

 

[arsenalgamer]

it runs pretty good with some gamer and mainstream settings with one of these video cards r4550 at 1280 by 720 res setting a bit choppy but its not what i had in mind
will a sappher 3850 512 with 256 bit memory work better i have this one as a spare??

 

[arsenalgamer]

it runs pretty good with some gamer and mainstream settings with one of these video cards r4550 at 1280 by 720 res setting a bit choppy but its not what i had in mind
will a sappher 3850 512 with 256 bit memory work better i have this one as a spare??
oh yeah how do i fix the memory issue on my first post??