Using my new 7990

sof006

sof006

sof006

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Joined
3 Dec 2011
Posts
19
Hey just trying out my new 7990 and need some expert advice.

I am using a MSI 990XA-GD55 and using the 7990 in the PCIe X16 slot and seem to be having some issues, my FPS in certain games (mostly Crysis 3 and Farcry 3) seem to dip a lot. My crossfire appears to be working just fine however according to MSI Afterburner my 2nd GPU is running at full 99% load and the first GPU is running at around 60/70% load... So I checked GPU-Z and it says my send GPU is running at x4 and the first is running at x16. What is going on? I am rather confused...

The rest of my specs are - FX 8150 running at 4.2GHz and using 16GBs of RAM running at 1333MHz, as well as a lovely XFX 750W 80 Plus Gold PSU. I have checked temps and everything is running fine, nothing is overheating.

Looking for some help! Thanks!
 
8 Pack said:
Both GPU should be running at x16 PCI X 2.0. To check this you will have to run a graphical programe such as a bench or a game as in the desktop the Drivers scale down the GPU to save power.

As of your stuttering in games this could be several issues. What Res are you playing at because even a 7990 cant handle those games at full settings at mega resolutions. Your CPU also could be bottle necking in the most intense parts of the game.

I would first update drivers and then monitor CPU and GPU use while playing and see if maybe CPU is a bottle neck.
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Okay I will do that. The res I am running at is 1920x1080, I plan on adding more monitors in the future (hence why I bought the card). I have the CPU clocked to 4.2GHz to see if that improves anything. I'll post back with my update soon :)
 
almighty15 said:
It's your CPU..... A 7990 needs a lot of CPU grunt to max it out and keep it fed with data.
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I understand my CPU might not be powerful enough to supply full FPS but it still doesn't explain why its running at PCIe 3.0 when my board is clearly not even capable of 3.0... :S
 
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