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Amd Hd 7950 msi Twin Frozr III Crossfire issues

post #1 of 8
Thread Starter 
Hi everyone,

I'm new today here because i have a big problem and I don't know what to do anymore so my mate told me you guys are up for the challenge of my problem! First I have to excuse my English because i'm from Belgium.

So yesterday I bought a new HD 7950 Msi Twin Frozr III to add to my first one in my system. So the first thing I noticed was that the second one i bought is a slightly older version. My first card has 1x8 pin and 1x6 pin power connectors, my second only has 2 1x6 pin connectors. Didn't think this was going to be a problem because my first thought was that it had a slightly newer cooler that's why it needed a little more power.

Now I put them in crossfire with 1 msi crossfirebrigde that came with it. My computer recognized it and asked me to enable it so I did. The first thing I noticed then was a difference in Gpu-z:

first card:


Second card:


So the difference here is bios. I will try to flash them to the same bios later on the day.
The second thing I saw, and i'm not sure if that is normal, is that when i start my computer and do nothing the second gpu shows other bus width and Bandwith. I hope this is normal!

I played Battlefield 4, Need for speed Rivals, Call of duty Ghosts and fifa 14 with this config and all had the same fps drop.. Bf4 showed the most fps drops ranging from 25 - 125 fps which is very annoying to play. I've asked a lot of people and they say it's a driver related thing but most people on bf4 don't have the problem with 2 7950's in crossfire.

I disable UPLS also so that ain't the problem and in CCC I raised the power. When I play i see 99% of usage on my second gpu while gaming and my first only has 40-45% of usage.

They also say it's Cpu related that bottlenecks my gpu's. I have an Amd Fx-6100 4.4 Ghz oc

My Rig specs:

Cpu: Amd Fx-6100 4.4 Ghz oc
Mb: Asus Sabertooth 990FX (1st version)
Mem: Kingston Hyper-X 8gb 1600 DDR3
Gpu: Hd 7950 msi Twin Frozr III Crossfire
Psu: Thermaltake 850Watts
Case: Thermaltake level 10GT
Hdd: Western digital 500 gb (games location)
SSD: Intel xm-25 80Gb
Cpu cooler: Antec Khuler 920 liquid
Os: Windows 8 pro 64x




I hope you guys can help me with this problem, I would be a very happy man!
post #2 of 8
difference in bios does not matter. i've crossfired 7950 and 7970 and they ran in their own clocks just fine. drops are expected 'cause - and i won't sugar coat it - even one 7950 will be bottlenecked by that cpu.

edit: those 7950s are faster than a stock Titan. It is like you just paired a Titan to a 6100.
Edited by rdr09 - 11/21/13 at 6:10am
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
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Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
  hide details  
Reply
post #3 of 8
Thread Starter 
Thanks for the honest and harsh reply haha! Appreciate it. What do you recommend I buy on the am3+ platform? Will the fx-8350 suffice?
post #4 of 8
Quote:
Originally Posted by Vanderwal View Post

Thanks for the honest and harsh reply haha! Appreciate it. What do you recommend I buy on the am3+ platform? Will the fx-8350 suffice?

8350 no doubt. Go!

edit: btw, very nice rig.thumb.gif
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
  hide details  
Reply
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
  hide details  
Reply
post #5 of 8
Thread Starter 
Thank you very much and I will report back when I have the cpu installed in my rig!
post #6 of 8
When you go xfire you always reinstall the driver. Download ddu, wipe the driver and reinstall. After that disable over clocking in ccc. After that download trixx and disable upls and sync both cards on over clock. Restart your computer and make sure ccc over clocking is off and then over clock and use power slider in trixx. Have gpuz open in the background to monitor your cards and run a single player game or bench to see utilization.

Typing on phone sorry if it's hard to read.
post #7 of 8
Quote:
Originally Posted by dir_d View Post

When you go xfire you always reinstall the driver. Download ddu, wipe the driver and reinstall. After that disable over clocking in ccc. After that download trixx and disable upls and sync both cards on over clock. Restart your computer and make sure ccc over clocking is off and then over clock and use power slider in trixx. Have gpuz open in the background to monitor your cards and run a single player game or bench to see utilization.

Typing on phone sorry if it's hard to read.

i've done crossfire twice with 7900 series cards. both times all i did was shutdown the system and install the second card. the existing driver worked for both. the second time, though, i had to reboot for the system to recognize the second card after enabling crossfire in CCC.
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
  hide details  
Reply
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 8 / 1600 
Hard DriveCoolingOSMonitor
1000 360/240 7 64 28 2160 
PowerCase
850 540 
  hide details  
Reply
post #8 of 8
Thread Starter 
hi guys, i will look up into the solutions. I just took the second card out and let my new one sit in the system. I booted and replaced the old bios version with the new one. I've just switched the cards from position (first card in 3rd sloth, and card from 3rd slot into first sloth). Now i placed my second in so i have the bios rom on the same cards. I ran bf4 for a half an our and no fps drops under 75 fps so i think i've solved the problem, hopefully.. I didn't test any other games so i will do this first!

Still looking to buy another cpu though because my cpu is 100% load all the time and I think my cards are doing to much work because they are both at 99% but they get so hot. The fans are ramping up like i'm setting next to a jet.
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