crossfire 7950, something is not right

Ian Jones · 20 May 2014 at 15:01

Hi all

my set up is in my stig, and I have gone from one windforce 7950 to two of them in crossfire.

On bf4 I would get 60 fps all the time with the odd dip every now and then. with no over clock from what I can remember.

I have just fitted a second one, and in CCC the core speed is now set at 1000 for both cards (i have not change this)

one card is a rev 1 and the other rev 2.

now when I play bf4 I am gett fps of around 40 at its best and the odd 60 when in the air.

what could be causing the performance drop?

thanks
ian

snips86x · 20 May 2014 at 15:02

Have you enabled crossfire for BF4 in the CCC? You can set custom profiles.

HecFam · 20 May 2014 at 15:03

Im sure LtMatt will drop in anytime soon, here is his CF thread, really helped me when setting mine up. http://forums.overclockers.co.uk/showthread.php?t=18544020.

I think ULPS is a bit of a pain, make sure thats disabled.

Ian Jones · 20 May 2014 at 15:53

snips86x said:
Have you enabled crossfire for BF4 in the CCC? You can set custom profiles.

Yes it is enabled in ccc

Ian Jones · 20 May 2014 at 15:53

HecFam said:
Im sure LtMatt will drop in anytime soon, here is his CF thread, really helped me when setting mine up. http://forums.overclockers.co.uk/showthread.php?t=18544020.

I think ULPS is a bit of a pain, make sure thats disabled.

I have tried everything that I can there, but I think he must have a different version of msi

snips86x · 20 May 2014 at 15:59

Ian Jones said:
I have tried everything that I can there, but I think he must have a different version of msi

I thought the same but it is definitely there. Tucked away at the bottom of the settings menu!

arc@css · 20 May 2014 at 16:03

The cpu might be holding the two 7950's back.

Ian Jones · 20 May 2014 at 16:32

arc@css said:
The cpu might be holding the two 7950's back.

I was getting better fps with just one 7950, add another and things run slower

Ian Jones · 20 May 2014 at 16:44

snips86x said:
I thought the same but it is definitely there. Tucked away at the bottom of the settings menu!

still can not see it, so changed it like this

http://www.tomshardware.co.uk/faq/id-1904869/disable-ulps-amd-crossfire-setups.html

Uncle Petey · 20 May 2014 at 16:51

Are you using AB beta 19?

Ian Jones · 20 May 2014 at 16:53

something I have just noticed in msi

under the usage

gpu1 is at 99%
gpu2 is at 43%

msi only shows the temp for gpu1 and not 2 as well.

Ian Jones · 20 May 2014 at 16:54

Uncle Petey said:
Are you using AB beta 19?

no, am using 2.3.1

Uncle Petey · 20 May 2014 at 16:55

Grab 3.0.0 Beta 19

LtMatt · 20 May 2014 at 17:02

I've just read a few of the posts. I'm going to take an educated guess and say you have a non boost 7950 and a boost 7950 and the boost 7950 has the throttling problem that plagues every 7950 boost card. If you like i can take a look at the bios for you and edit it for you so the problem goes away. Assuming this is indeed the problem that is.

Ian Jones · 20 May 2014 at 17:08

Uncle Petey said:
Grab 3.0.0 Beta 19

that has shown up a lot more options, and the disable ULPS is ticked

Ian Jones · 20 May 2014 at 17:09

LtMatt said:
I've just read a few of the posts. I'm going to take an educated guess and say you have a non boost 7950 and a boost 7950 and the boost 7950 has the throttling problem that plagues every 7950 boost card. If you like i can take a look at the bios for you and edit it for you so the problem goes away. Assuming this is indeed the problem that is.

my first card is a 6+6 pin power, and the new one is a 6+8 pin one.

how could I tell if they are a boosted or non booted version please?

LtMatt · 20 May 2014 at 17:11

Ian Jones said:
my first card is a 6+6 pin power, and the new one is a 6+8 pin one.

how could I tell if they are a boosted or non booted version please?

Upload the bios of both cards individually using gpu-z and post them here.

Ian Jones · 20 May 2014 at 17:18

LtMatt said:
Upload the bios of both cards individually using gpu-z and post them here.

i have downloaded gpu-z, I have saved the bios file tp my pc, but how can I get it up on here please?

Ian Jones · 20 May 2014 at 17:21

https://www.dropbox.com/sh/382a8x5tsc6r2cz/AABolK2q9MaoH3a-FW-BN9pDa

new gpu is the one I got today, old gpu is the one that I have been using and has been working very well.

Ian Jones · 20 May 2014 at 17:29

the new gpu (1000 core on gpu-z)
https://www.dropbox.com/sh/382a8x5tsc6r2cz/AABu3I0ZTWXk5XvVFIDKJ43aa/new gpu.rom

my older gpu (900 core on gpu-z)
https://www.dropbox.com/sh/382a8x5tsc6r2cz/AAAf_xMY0VPOob6KwGq2XUIna/old gpu.rom