Am I doing something wrong with crossfire?

[TheLegendOfMart]

Am I doing something wrong with crossfire?

I have 600W PSU, 2x 2GB 7850, core i5 2400 @ 3.6GHz, 16gb ram, 128gb ssd, etc..

Nearly all games I get better performance disabling crossfire and running just a single card and either card runs fine on their own.

Running Windows 8 with 13.8 Beta 2 drivers.

 

[TheLegendOfMart]

Is a sandybridge at 3.6GHz really a bottleneck?

I have 600W crossfire certified PSU and ULPS is disabled, neither of them are overclocked and are the exact same model

I have uninstalled, cleaned and reinstalled latest 13.8 beta 2 drivers.

 

[TheLegendOfMart]

CS:GO getting TERRIBLE fps, flicks from 150+ to less than 40fps on a lot of official maps.

Contemplating selling them both.

 

[TheLegendOfMart]

Yeah they are both the exact same make and model.

I've tried swapping them round, turning the bridge round, uninstalling, cleaning and reinstalling drivers, etc..

What annoys me is that they run great on their own.

It may be a bottleneck or my motherboard is just crap.

 

[TheLegendOfMart]

Yeah tried 13.6 Beta 2 after the usual uninstall and clean.

Tried both cards again on their own, getting capped 300fps in CS:GO, soon as I enable crossfire the FPS is all over the shop.

I was warned off crossfire but I thought I knew better.....

 

[TheLegendOfMart]

Thanks for the help, will give it a try and see what happens.