Will my cpu bottleneck my 2 gpus?

Leonell12

Honorable
Apr 8, 2013
629
0
11,360
Hi, i am thinking of upgrading my computer's gpu. I currently have a radeon hd 7570 2 gb version and was thinking of going for the radeon hd 7870 since alot of forums suggested this would be the perfect match for my amd A10 5700 3.4 ghz cpu and any gpu better than that will be bottle necked by my cpu.
I am thinking of buying a 7870 now and then buying another 7870 3-4 years down the line and crossfiring the two. My question is, that 2 7870s are certainly more powerful than one and since my cpu will bottleneck anything more powerful than a 7870, will it bottleneck my 2 7870s and not let the 2 cards deliver the performance they can? And yes, i will be using the pc for gaming at mostly 1920x1080 resolutions.
Any help is appreciated, thx in advance.