Are my two GPUs (CrossFireX) set up correctly?

[King Mustard]

EDIT: Disabling ULPS in the registry fixed it 🙂

I have just bought a second 7870 XT to stick in my Maximus V Extreme, along with my quality 750W PSU and 3570K.

I run @ 1680x1050 and on a 64-player server with all settings maxed out in BF4, I still get very occasional 40fps dips, which I'm disappointed about. Are such occurrences to be expected?

This is what GPU-Z is showing about my two cards:

 

[wand3r3r]

You have to set it in the Catalyst control center - performance - Enable crossfirex.

 

[King Mustard]

You have to set it in the Catalyst control center - performance - Enable crossfirex.

It's already enabled :thumbsup:

I have just disabled ULPS in the registry. Will restart and see if it helps.

 

[wand3r3r]

AT Bench says ~40 FPS for 1080p high settings. I'd guess 1680x1050 is somewhere above that (50+?) and crossfire should almost double it. It should be around 100 FPS imo.

Since BF4 is also CPU dependent and 64 players are very demanding it could be dropping that low at times. I would expect a much higher average though, have you checked?

Try bump up the clocks, is 975 stock? Is your CPU overclocked? You could bump that up too.

 

[n0x1ous]

EDIT: Disabling ULPS in the registry fixed it 🙂

I have just bought a second 7870 XT to stick in my Maximus V Extreme, along with my quality 750W PSU and 3570K.

I run @ 1680x1050 and on a 64-player server with all settings maxed out in BF4, I still get very occasional 40fps dips, which I'm disappointed about. Are such occurrences to be expected?

This is what GPU-Z is showing about my two cards:

your first screenshot shows Tahiti LE with 1536 shaders and your second screenshot shows fully tahiti 2048 shaders.

Are you sure you dont have a 7870 myst and a 7970? I know AMD supports more odd CF combos than NV but it may be a factor in the kind of scaling you are seeing.....

EDIT: just saw ULPS took care of it

 

[Techhog]

your first screenshot shows Tahiti LE with 1536 shaders and your second screenshot shows fully tahiti 2048 shaders.

Are you sure you dont have a 7870 myst and a 7970? I know AMD supports more odd CF combos than NV but it may be a factor in the kind of scaling you are seeing.....

EDIT: just saw ULPS took care of it

There's a lot wrong with that second screenshot. GPU-Z is a buggy program though.

 

[n0x1ous]

There's a lot wrong with that second screenshot. GPU-Z is a buggy program though.

well the memory bandwidth and bus is due to ULPS being active in that screenshot so thats to be expected, but ive never seen it wrong on the actual chip name or shader number

 

[Techhog]

well the memory bandwidth and bus is due to ULPS being active in that screenshot so thats to be expected, but ive never seen it wrong on the actual chip name or shader number

The chip name is correct though...

 

[n0x1ous]

The chip name is correct though...

Right thats what I meant.