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2x HIS HD 6950

Seany84

Seany84

Seany84

Associate
Joined
15 Dec 2010
Posts
117
Hi all,

I just received my 2x 6950's two days ago. After installing them I noticed that in the CCC that when I select one of them the GPU clock is at 400MHz and the memory clock is at 1126Mhz but when I select the other one GPU and Memory are 0 MHz. Is the second card ok? :(

Also, you know the crossfire bridges. Should I just be using one to connect the two cards or should I use the two bridge connectors? I am using 2x of these at the moment.


Thanks in advance
 
You get two brand new video cards and the first thing you do is check CCC rather then jump into you're favourite game?!?

It sounds like power play has kicked in, just run some benchmarks to make sure everything is working and everything clocks up when put under load. You only need one bridge.
 
Second card is fine, think it's a bug with CCC. My 2nd card shows 0MHz for both GPU clock and memory but I know it's working ok.

You only need 1 crossfire bridge but it doesn't really matter if you use 2.
 
Mean Mr Mustard said:
Second card is fine, think it's a bug with CCC. My 2nd card shows 0MHz for both GPU clock and memory but I know it's working ok.

You only need 1 crossfire bridge but it doesn't really matter if you use 2.
Click to expand...

I used to get this when i had 5870 xfire and it was the drivers,try some different drivers to what you are currently using
 
Seany84 said:
Hi all,
I just received my 2x 6950's two days ago.
Click to expand...

Freddie1980 said:
You get two brand new video cards and the first thing you do is check CCC rather then jump into you're favourite game?!?
Click to expand...

No. I tried Call of Duty: Black Ops and Civilisation V full settings. Noticed the FPS in black ops ranging between 35-60. Metro 2033 and Fallout: Vegas are on the way..


I'm using Catalyst Driver v10.12 at the moment.

Is power play something I can enable/disable? If so, how?

I am downloading Heaven benchmark suite at the moment. I am planning on testing at stock 6950. OC'd 6950 and finally BIOS flashed 6970 :cool:
 
I think it's proabably just a driver/ccc driver issue.

You can't disable powerplay and it will pretty much put the 2nd card to sleep when not in use.

It should ramp back up when gaming or benchmarking and the heaven benchmark should reflect this.
 
maximusmi2 said:
I think it's proabably just a driver/ccc driver issue.

You can't disable powerplay and it will pretty much put the 2nd card to sleep when not in use.

It should ramp back up when gaming or benchmarking and the heaven benchmark should reflect this.
Click to expand...

Yeah it appears to be a driver issue alright.

Just about to flash to the 6970 BIOS :)
 
Just to let yous know I used the batch file. I left both cards in and made sure the switch was in the correct position.

  1. I ran the batch file.
  2. It created a backup of the BIOS on card0 as expected as backup.bin
  3. It then flashed it and rebooted my machine.
  4. After reboot, I renamed the backup.bin to backup0.bin
  5. I then edited the batch file and pointed it to card1.
  6. Ran the batch file again and then rebooted.

Very easy. Very well scripted batch file.


2x 6950 Stock
5335186567_05cc7ba18b_b.jpg


2x 6950 Stock OC 840 1375
5335800366_a1603c4b97_b.jpg


2x 6970 Flashed 840 1375
5335800314_0259f91f91_b.jpg
 
You're getting lower minimum FPS on the 6970s. Have you checked the +20 power play setting to see if that improves the situation?
 
Let heaven run through once or twice before you start the benchmark, you are getting lower min frame rates than I am getting on a single 6950!
 
I think something isn't working with the xfire for the dual 6970 benchmark. It should be higher than that I think. Like melmac said let it run through once and then count the result on the 2nd go, it will give you higher min fps.

Also your clocks should be 880 and 1375 on a stock 6970 flash
 
Yeah I don't know what is wrong. I am getting very poor performance in Call of Duty: Black Ops which is very disappointing. All settings are maxed out as I would have thought these cards should handle this game without any problem. I am getting FPS as low as 20 in some maps. Anisotropic filtering and Ant-aliasing are both on full.

@maximusmi2
Yes that was a mistake on my part, clocks are 880 and 1375

@FrenchTart
I've increased the power play settings to 10%

@melmac
I'll give that a go and see how it goes, judging by the performance in the game mentioned I cannot see the benchmark performance improving.


Does it matter what way the crossfire bridge is connected? Could it be on the wrong way around?

Suggestions are welcome lads.
 
according to asus's website 1 runs it 16x and the other runs in x4 if I am correct?

[EDIT]:

Nope I am wrong :p
 
Last edited:
3 x PCIe x16 (blue @PCIe2.0 x16 mode, black @PCIe x4 or x1 mode) supports CrossFire Technology
Click to expand...

I thought there was two 16x ones on it. Obviously not.

This is the cause of it isn't it?

EDIT:
Greg I am sending you the bill for a minor cardiac arrest .. lol
 
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