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Low fps with 7970 crossfire

Last response: in Graphics & Displays
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October 13, 2012 12:00:28 PM

Hello, I just bought two 7970 crossfire 2 days ago, but for some reason I only get 30fps on ultra settings 1920x1080. When I should be able to get 120 fps.

The rest of my build:
CPU: AMD Phenom ll x6 1100T processor
RAM: G.Skill Ripjaws X 8GB 2133 MHz
Motherboard: Crosshair IV Formula
PSU: Corsair GS800
Monitor: LG Flatron W2363D (120hz refresh rate)

Can anyone help me?

More about : low fps 7970 crossfire

October 13, 2012 4:32:03 PM

Zipioz said:
Hello, I just bought two 7970 crossfire 2 days ago, but for some reason I only get 30fps on ultra settings 1920x1080. When I should be able to get 120 fps.

The rest of my build:
CPU: AMD Phenom ll x6 1100T processor
RAM: G.Skill Ripjaws X 8GB 2133 MHz
Motherboard: Crosshair IV Formula
PSU: Corsair GS800
Monitor: LG Flatron W2363D (120hz refresh rate)

Can anyone help me?



I mean i dont think it should be bottleneckin because the cpu is actually quite decent im using one of them. it sounds more like hardware probs or even the game just not working properly with that model in crossfire it happens all the time then amd release a driver and everythings fixed untilll the next one lol.
If its doing it with all your games then it sounds like bottleneckin but it shouldnt justify having to go out and but a better cpu like a i5 or i7 because amd 1100t are really good cpus aswell.
October 13, 2012 7:20:08 PM

BigMack70 said:
I used a 4.0 GHz 1100t with a SINGLE 7970 @ 1200/1700 and got bottlenecks in any game that couldn't use at least 4 cores well.

A pair of 7970s is going to require much more CPU horsepower at 1080p in most games.

What games are you talking about OP?


So far I have only checked my fps in bf3.
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October 13, 2012 11:26:18 PM

BigMack70 said:
No, with that CPU you should absolutely not be able to get 120fps.

You are (with 99.9% certainty) majorly CPU bottlenecked on a single monitor. You need an i5-2500k/3570k or i7-2600k/3770k or better CPU to run 7970 Crossfire.


Its six core cpu i belive it can handle 7970 c.f
He should cheke his gpu c.f connection(low propbility)
He should insert one gpu copy the driver then insert other gpu and copy again the driver (high propbility)
Almost forgot there are mobo's that dont need the c.f gpu connection so he should try without the con if he didnt
October 14, 2012 12:44:13 AM

BigMack70 said:
In BF3 there's a chance the CPU won't hold him back but I dunno... it definitely can do more than 30fps

In most games, it will be a bottleneck in a big way...


Its a Phenom X6 were talking about here...
Not a Pentium 4...

Speaking of which, the real bottneck may be down to drivers, hard disk, bloated windows installation etc.
the processor should NOT be the issue, my best bet is on software issues.
!