Weird Crossfire Performance

[Slashice66]

Hey guys,

So I added a second 7970 to my rig recently but I'm having some issues. First, I had some insane screen tearing so I used vsync and frame limited like rivatuner and it got rid of some tearing but it brough insane stutters in games. So I read somewhere that vsync in crossfire cause issues so I bough a 144hz monitor.

I no longer got screen tearing (awesome monitor) but I still got some weird performance that doesnt feel right with my setup. (4770k @ 4.2 with 2X7970 OC). One example would be in BF4 on all ultra I got between 50 to 70 fps on 1920X1080. Checked MSI afterburner and the GPU stats are either not showing up (all stats are at 0) or my GPUs are both at around 60%. I'm using a 1000w PSU,2X4G RAM and 1 bridge between the 2 cards. ULPS was disable trough MSI afterburner. I'm using 14.7 beta drivers.

Any idea what could cause this ? It also seems to be the case in other games like divinity original sin.

Thanks !

[Karumu]

 

Hey guys,

So I added a second 7970 to my rig recently but I'm having some issues. First, I had some insane screen tearing so I used vsync and frame limited like rivatuner and it got rid of some tearing but it brough insane stutters in games. So I read somewhere that vsync in crossfire cause issues so I bough a 144hz monitor.

I no longer got screen tearing (awesome monitor) but I still got some weird performance that doesnt feel right with my setup. (4770k @ 4.2 with 2X7970 OC). One example would be in BF4 on all ultra I got between 50 to 70 fps on 1920X1080. Checked MSI afterburner and the GPU stats are either not showing up (all stats are at 0) or my GPUs are both at around 60%. I'm using a 1000w PSU,2X4G RAM and 1 bridge between the 2 cards. ULPS was disable trough MSI afterburner. I'm using 14.7 beta drivers.

Any idea what could cause this ? It also seems to be the case in other games like divinity original sin.

Thanks !

 

welcome to the world of crossfire, some games just hate it and you have to deal with it unfortunately

[Enderman]

That's crossfire for you.

[<boss2939>]

try using gpuz, if that doesn't work take one card out and test it to see it is working properally do this again for the other card. and lastly if nothing works and your desprate a complete reinstall of windows7 could help you'd be suprise on how many things work perfect after a reinstall.

[Slashice66]

try using gpuz, if that doesn't work take one card out and test it to see it is working properally do this again for the other card. and lastly if nothing works and your desprate a complete reinstall of windows7 could help you'd be suprise on how many things work perfect after a reinstall.

sometime GPUZ froze when switching between the 2 cards (switching information panel) so I guess its a driver issue so I will try to reinstall them.

[<boss2939>]

sometime GPUZ froze when switching between the 2 cards (switching information panel) so I guess its a driver issue so I will try to reinstall them.

ya it might be the amd driver