BF4 Crossfire 270x terrible performance

[zielritter]

Specs:
CPU: FX-8350 @ 4.4ghz
OS: Windows 7 64 bit
GPU: 2 XFX 270x @ 1150/1475 Crossfire
PSU: 850w Corsair
Mobo: ASUS m5a99fx pro r2.0
RAM: 4x2gb GSKILL 1600mhz

GPU Driver: 13.11 Beta 9.5

I picked up a second XFX 270x today and have my crossfire working fine.....except in BF4. I'm beginning to think that AMD is lying about how badly their CPUs bottleneck in multiplayer games.

Running one 270x on ultra without MSAA I was getting 85-99% utilization, which I was fine with. I would get 40-60 fps on most maps.

Adding the second 270x, now my GPU utilization is 40-50% and my frame rate is more or less the same. Adding 4x MSAA doesn't even impact fps, which tells me the CPU is the weak link.

Now, before you say it, I know the crossfire set up works fine. My 3dmark GPU score went from 9200 to 17300. Similar results on unique heaven. What's going on here? Btw, none of my cores are parked. I made the registry changes and all are active.

 

[closest_num_2_0]

its true if you have not tried it you can not say your opinion on it when only using one core you are getting a cpu bottle neck in battle field 4

 

[zielritter]

You're 100% correct. I'm picking you as the solution. Who knew that the piles of empirical evidence to the contrary were fabricated.

 

[closest_num_2_0]

thank you very much for understanging