280x performance on GTA 5

[ApoliteSandwich]

Hey, i just have a quick question for everyone about performance in Grand Theft Auto 5. I own an R9 280x, and I have been playing a lot of GTA V lately. However, I recently noticed that my game seemed to be running much slower than cards similar to it, like the R9 285. (According to benchmarks like these: http://www.gamersnexus.net/game-bench/1905-gta-v-pc-fps-benchmark-graphics-cards) From what I know, the 280x is slightly better than the 285.
This is my build:
CPU: i5 4670k @ 3.4GHz
GPU: XFX R9 280X
RAM: 16 GB DDR3 @ 2133
Motherboard: MSI G45 Gaming edition
PSU: Corsair TX 850M

I did notice that the benchmark I am referring to was using a generation above my CPU, so I expect to get slightly less performance. Surprisingly, unlike the average FPS shown in the benchmark, (which is 55 fps at 1080p ultra) when I crank the settings up to ultra in 1080p, I never seem to get above 30 fps. even when i turn the settings down to high I only average about 45 fps. What is causing this and is there anything that can help? Thanks.

 

[Suzuki@1473780084@1473780163]

Actually the Rockstar Team said that a i5 4470 and GTX 660 is enough to run it at Ultra 1080 60. No overheating going on here? I'm guessing they're working on drivers for AMD but you never know. Let's see what others say.

 

[ApoliteSandwich]

No overheating for me. And I downloaded the new drivers from AMD

 

[thelivingflesh]

i got the same rig as you....what do you think should i put in another 280x coz i am getting the same fps are you are!
maybe a single 780ti?

check this benchmark!
looks like we are doing fine!