Performance Problems with AMD RX480 Crossfire

[AimbotApple]

Hey,

I bought 2 PowerColor RX 480 8GB a few days ago.

I've installed these in my system and reinstalled Windows 10 and the latest version of the AMD Crimson driver (16.6.2).

But I have serveral problems in many games.

GTA V: With one RX480 I can reach 30-45 FPS with max settings (no mxaa) at 1440p/144Hz and without a profile in Crimson.

With Crossfire enabled I can reach 30-60 FPS with the same settings but there are many laggs and microstutters. The gaming experience isn't fluently anymore.

Farcry Primal: Without Crossfire the game runs perfectly fine on max settings 1440p/144Hz with 30-40 FPS and it runs with 50-80 FPS with Crossfire but there are many graphic bugs (flickering).

Black Ops 3: Here Crossfire kind of works. I can reach 70-80 FPS on max settings with the profile "Optimized 1x1" but these are still not the 100 FPS most of the benchmarks promised.

 

Games like Battlefield 3, Asseto Corsa and Hitman Absolution run perfectly fine with good FPS but why can't I reach the performance with crossfire everyone else is experiencing??

I have already tested every single CF profile and I have reinstalled the driver.

 

My System:

Processor: AMD FX8350

Mainboard: Asus M5A97 R 2.0

RAM: 16GB DDR3

HDD: 1+2 TB Toshiba DT01ACA200 SATA 3 (these are in Raid so it works as one big 3 TB HDD)

SSD: 125GB Samsung SSD 840 EVO

Powersupply: Thermaltake Berlin 630 Watts

Windows 10 Home (not activated yet)

 

Before I was able to use the RX480s I forgot to uninstall the old Nvidia driver from my 770. My PC wasn't able to start anymore (neither with the RX480 nor with the 770). After trying several bootrec commands which did not work, I decided to reinstall Windows. (I don't know if this matters for solutions )

 

Greets,

Markus

[MoraisGT]

New drivers will come in the future correcting alot of bugs and performance issues.

 

But it could also be that your 8350 is just not up to the task.

[MoonlightSylv]

It's most likely a CPU bottleneck.

Also what PSU is it?

 

Edit: New drivers could possibly fix this.

Edited July 4, 2016 by ShadowTechXTS

[AimbotApple]

@MoraisGT MSI Afterburner says that in GTA V my CPU usage is about 80%.

And why would FarCry work with good FPS but it has graphic bugs?

[AimbotApple]

@ShadowTechXTS It's a Thermaltake Berlin 630W but I messured it and while playing GTA V with crossfire my system uses around 380-420W.

[MoonlightSylv]

1 minute ago, AimbotApple said:

@ShadowTechXTS It's a Thermaltake Berlin 630W but I messured it and while playing GTA V with crossfire my system uses around 380-420W.

Ok, not a great PSU but it might be okay. @STRMfrmXMN would know better than me though.

 

It still could be early drivers or your 8350.

[Hero7750]

Crossfire has been a problem in gta v for a little bit, it even gives me trouble so i just run gta v with 1 gpu.

[AimbotApple]

Yeah I've read a lot about people having problems with crossfire in GTA V but there are benchmarks with 100-130 FPS on 1440p max settings without issues.

 

[AimbotApple]

Update: Just installed Primal on my SSD because I thought there would be a problem with my 2 HDD's which are used in RAID but there are still the same flickering bugs as on the HDD.

[AimbotApple]

I've tried the 2 RX480s in another setup with an Intel i5 4590, 24GB DDR3 RAM and 750W LC Power. GTA V was better (about 30-80FPS with some microstuttering) than on my setup but it was still far away from the benchmark results. I did not try any other games except CS:GO which performed terrible on both systems (worked fine without crossfire).

[STRMfrmXMN]

28 minutes ago, AimbotApple said:

@ShadowTechXTS It's a Thermaltake Berlin 630W but I messured it and while playing GTA V with crossfire my system uses around 380-420W.

Bit of an average PSU but I do believe it's of adequate Crossfire capability.

[AimbotApple]

Battlefield 4 works perfect! I managed to get 70-120 FPS in a Multiplayer TDM match with Ultra Settings 1440p and 100-125 FPS on test range. Both GPUs are at 100% usage and CPU uses 50-85%.