i have a problem going on and i need expert advice.
2 months ago i purchased my best friend's pc, as he got a new one.
this one had:
amd phenom x4 9950 2.6 ghz quad core black edition
4 gb ddr2 ram 800 mhz
sapphire hd 4890
550 watt xfx psu
windows 7 64 bit
as i got his pc next to nothing, i started to upgrade his system for myself.
got a brand new gigabyte 7870 2gb and the fps i got on bf3 was around 40 to 60 fps on medium quality and native resolution of 1440x900.
i recently got another gigabyte 7870 2gb to do the crossfire, after some struggles finally i got it and installed it properly in my pc.
booted the system, ran bf3, BAM! 20 to 40 fps!!!
researched the web, got CAPs for amd catalyst, no change in performance.
flashed the mobo bios to a new version, nothing.
added another 4gb ddr2 ram 800 mhz (now 8gb total) the system got slower!
disabled the crossfire, tested both gpus on their own pci-e slots and got 40-60 fps in bf3, ran the crossfire again and i got 20-40 fps....
what is wrong with my pc?
i updated my pc to amd fx 8350 with 8gb ddr3 and a 750 watt psu and i can get 60-to-150 fps easily.
thank you all!
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