Graphics Card for my build

Andy11466

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Mar 21, 2013
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I'm trying to look for a good graphics card for my build.
Trying to go for under $200.

My specs are:
Mobo - Asus M5A97 R2.0
CPU - AMD Athlon II x4 645
GPU - ATI Radeon 5770 on my 1920x1080 screen
Radeon 7570 on my 1600x900 screen
PSU - TR2 RX 850W

My graphics cards are not crossfired, just using them to run two screens.
my 5770 can run two but external monitor won't be able to use max res.

Any suggestions for my build? will using a second graphics card for the external monitor cause problems like crossfire even when it's not crossfired?

also is my cpu good enough? I heard the cache isn't good for gaming, if I bought a phenom is it a big improvement? Any suggestions for my build?

Sorry if it's too many questions but I was looking online, and most of the answers I saw say they needed to know the pc's specs to know what's best.

PS: I'm looking to replace the 5770 cause I only use that one to game (1920x1080 monitor) I use the other one for videos which aren't a problem.