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New 6850 Xfire/Non Xfire problems.

post #1 of 11
Thread Starter 
Having an 6850 for almost a year I decided that it was time to crossfire it, since my older one has always pleased me.
Today my second 6850 arrived and I started preparing my computer by uninstalling the drivers and TRIXX, after unboxing the 6850 I noticed that the PCB isnt the same, I ignored it thinking it probably was a new revision and installed the card with the Crossfire Bridge.
Booted the computer, installed 11.10 Preview 3.
Activated Crossfire.
Installed 11.9 Caps 3.
Went to check in GPU-Z to confirm that it was running Crossfire...
Well one of the GPU's(new 6850) says Crossfire disabled and the other one says Crossfire enabled(old 6850).
I went to check the Bios version of both, they different. Tried to save the Bios from the new one and it gave an error message saying the Bios is locked.
Went to run Uningine Benchmark 2.5.
It was obvious that it was running Crossfire I could see almost double the performance from what I previously had...
I decided to ignore GPU-Z readings and try to OC them both.
Tried to use Afterburner
I know that my old 6850 is stable as a rock at 900Mhz Core and 1100Mhz Memory, this new one shows nothing under Afterburner options when I changed to it. Has 0 Core Clock, 0 Memory Clock and I cant adjust voltages.
I decided to try and force it making Afterburner sync both cards... BSOD.
Quit'd on Afterburner, tried to see what the driver could offer.
Max core clock is 850Mhz and set 1100Mhz on memory.
BSOD.

Decided to try the new GPU solo(old 6850 disconnected). Cant overclock it solo either but Afterburner displayed Core clocks and Memory clocks when it was solo.

I already sent an e-mail to the shop I bought this from, but I would like to know if any1 faced a similar problem and how did they resolve it?
Having to return this GPU means 2 more weeks waiting for a new one to arrive

EDIT: I cant post more screenshots on this matter atm cause im changing my ISP during this week.



Edited by Tokkan - 10/24/11 at 2:26pm
post #2 of 11
Uninstall Afterburner, Catalyst package and CAP. Install Cat 11.9 + Cap3 then install Afterburner. Don't do anything just yet untill you disable ULPS.

To disable ULPS:

1. Go to regedit (start > search programs and files > "regedit").
2. In drop down menu: find file > type "enableulps".
3. For ALL instances (keep pressing F3) change the "1" value to a "0".
4. Reboot PC.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
Uninstall Afterburner, Catalyst package and CAP. Install Cat 11.9 + Cap3 then install Afterburner. Don't do anything just yet untill you disable ULPS.

To disable ULPS:

1. Go to regedit (start > search programs and files > "regedit").
2. In drop down menu: find file > type "enableulps".
3. For ALL instances (keep pressing F3) change the "1" value to a "0".
4. Reboot PC.
Starting to do what you just said, before reading your post I gained access to the new GPU bios. lol
Hope your solution works!
post #4 of 11
Thread Starter 
I cannot express how much gratefull I am to you at this precise moment.
The only thing I can say is thank you for you have saved me precious time, you are the proof of why this forum is imo the best arround.
Thanks you.
post #5 of 11
Glad it fixed it. Have funs.
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post #6 of 11
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
Glad it fixed it. Have funs.
Even though it fixed most of my problems I left the computer without doing any heavy test on it yesterday..Today I started benching with stock clocks and in uningine the whole pc locks while benching, need a hard reset to make it work again.
This after some tests is happening with everything that uses the new GPU hard.
I already changed the pcie slots and it still happens... Im still confused to why does the gpuz still says in gpu B crossfire enabled and gpu A crossfire disabled.
And why are there missing a huge number of sensor readings from gpu B to gpu A? they are the same sapphire vanilla 6850...
post #7 of 11
Thread Starter 
bump
post #8 of 11
Quote:
Originally Posted by Tokkan View Post
Even though it fixed most of my problems I left the computer without doing any heavy test on it yesterday..Today I started benching with stock clocks and in uningine the whole pc locks while benching, need a hard reset to make it work again.
This after some tests is happening with everything that uses the new GPU hard.
I already changed the pcie slots and it still happens... Im still confused to why does the gpuz still says in gpu B crossfire enabled and gpu A crossfire disabled.
And why are there missing a huge number of sensor readings from gpu B to gpu A? they are the same sapphire vanilla 6850...
I would reset all the OC setting (CPU/RAM) in BIOS to default. Reset CMOS, go into BIOS to load "Optimized Defaults" and try again.

If it runs fine on stock settings, definitely the OC was not stable. If not, check the PCIe lane bandwidth. Take a screenshot of both GPU using GPU-Z side-by-side for each of them showing PCIe x16, x8 or x4. If you have sound or network card that is in the PCIe slot, remove them too.

Maybe first thing to try before all the above is to remove all Catalyst driver, then install Catalyst 11.9 + CAP3. Download Link: WHQL Catalyst 11.9 + CAP3
Edited by Ken1649 - 10/26/11 at 1:07am
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
I would reset all the OC setting (CPU/RAM) in BIOS to default. Reset CMOS, go into BIOS to load "Optimized Defaults" and try again.

If it runs fine on stock settings, definitely the OC was not stable. If not, check the PCIe lane bandwidth. Take a screenshot of both GPU using GPU-Z side-by-side for each of them showing PCIe x16, x8 or x4. If you have sound or network card that is in the PCIe slot, remove them too.

Maybe first thing to try before all the above is to remove all Catalyst driver, then install Catalyst 11.9 + CAP3. Download Link: WHQL Catalyst 11.9 + CAP3
Its using x16/x16 on the lanes, no sound card or network card.
I changed the new GPU to my x8 slot and it runs the same thing.
Im using the Cat 11.9 with CAP3 like you advised before, Ill reset all the overclocks.. Put it on the original lane x16 lane and test it again...
Btw this was happening on stock gpu clocks also.
I was monitoring the temps they were at 69ºC and my vmem usage was kinda of high... above 2Gb with AA on.
post #10 of 11
Quote:
Originally Posted by Tokkan View Post
Its using x16/x16 on the lanes, no sound card or network card.
I changed the new GPU to my x8 slot and it runs the same thing.
Im using the Cat 11.9 with CAP3 like you advised before, Ill reset all the overclocks.. Put it on the original lane x16 lane and test it again...
Btw this was happening on stock gpu clocks also.
I was monitoring the temps they were at 69ºC and my vmem usage was kinda of high... above 2Gb with AA on.
Yes, reset all OC to BIOS default to eliminate instability issue.

GPU-Z will always show the primary card "Crossfire Enabled". The second, third and fourth will always "Crossfire Disabled".
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