290x crossfire problem

[MatMatthewMat]

Hey. Here is the problem. I´ve got two 290x of different brands. One is made by Asus and the second by Sapphire. They are both reference cards with one cooler, looking all the same. Originally I was using the Asus 290x with 700 watt psu, playing on triple monitor (bf3) on medium details. I had a chance to buy a second 290x for very good price. So i bought it and ordered new 1000 watt psu (92% efficiency). The Sapphire card was running same as the Asus card. I didn´t even need to reinstall the drivers.

Today the new psu came. I´ve installed the hardware properly, uninstalled old drivers, installed the newest catalyst 14.12. The computer recognizes second gpu, they work together in crossfire, but the result is worse than gaming with a single gpu. Fps are low.. When I unclick crossifre in CCC, everything works fine. I´ve tried clean uninstalling twice, I´ve changed the order of cards... Nothing.

When I turn on Gpu tweak, I am able to controll both of them properly (fan speed), the clock speed runs perfect on both (1000,5000)... But the bios is different on each card (up to date)....

I don´t know what to do, I want to kill myself for making this "good bargain". Can you help me?

 

[quilciri]

Going from 16 players to 48/64 doesn't add a ton of load to the GPU, but it does stress the CPU quite a bit more. I'd check your CPU load on the 64 player maps.....wouldn't hurt to check GPU load while you're at it, though.

 

[MatMatthewMat]

Going from 16 players to 48/64 doesn't add a ton of load to the GPU, but it does stress the CPU quite a bit more. I'd check your CPU load on the 64 player maps.....wouldn't hurt to check GPU load while you're at it, though.

Cpu load is about 90%, the temperature is stable (no more than 50 degrees). The difference between conquest and deadmatch is in the size of the map. While playing conquest, the map is maybe 10 times bigger.

 

[quilciri]

I've a sneaking suspicion the CPU is the limiting factor in the 64 player maps.

 

[MatMatthewMat]

I've a sneaking suspicion the CPU is the limiting factor in the 64 player maps.

Few minutes ago I have played 24 player DM, and fps were running all the time around 50.

 

[Mousemonkey]

@MatMatthewMat, watch your language.

 

[MatMatthewMat]

- here are screenshots from gpu-z (monitored gpus while gaming)

 

[quilciri]

that could be useful, but I'm more interested in the load on the CPU.

 

[MatMatthewMat]

3d mark

cf enabled 11 100
cf disabled 8 600

- cpu load 90%

 

[MatMatthewMat]

2015-01-03 17:56:18 - bf3

Frames: 13059 - Time: 179156ms - Avg: 72.892 - Min: 34 - Max: 144
- gaming evolved launched

2015-01-03 18:05:50 - bf3
Frames: 15109 - Time: 251469ms - Avg: 60.083 - Min: 29 - Max: 100
- gaming evolved turned off