This may be a long post so bear with me as I try and explain the situation.
Since I have received my two VisionTek 4870s I have been running some benches. The first day I ran 3DMark03, 05, 06, and Vantage with one card. I then ran them again in Crossfire. I both cards worked great and I could obviously tell that everything was working as it should. After running my crossfire tests I went to disable crossfire and my screen became all scrambled. I could not see anything so I reset my pc and crossfire was disabled and that was that for the night.
The next day I decided to play with some overclocks on the cards. I first ran the benchmarks on one card and then in crossfire and again everything was working great. Again when I was finished I disabled crossfire and the screen went all scrambled. So once again I reset the pc and it came back up and crossfire was disabled.
Now here we are at yesterday. I decided to run some more benches just in crossfire mode and for whatever reason it would not work. For example Vantage had these crazy streaks in Jane Nash and I was getting something like 12 - 18 fps. So I stopped it and took a look at CCC and made sure that I enabled Crossfire. Sure enough. I also took a look at GPU-Z and it also showed crossfire enabled. I disabled crossfire to run a single card to see if that would work and of course when I disabled it the screen once again became all scrambled and I had to reset. However, once it came back up I was able to run Vantage and 06 on a single card with similar results to what I have been getting. Then I enabled crossfire again and I still had the same problem as before. With a single card I can get 10,000. With two cards now I am getting about 7800 in Vantage, whereas before with two cards I was getting about 13700. Something is definatly wrong I just do not know what it is.
Also this was all done with the 8.11 drivers. After going through all of this I uninstalled, booted into safe mode and ran driver cleaner, rebooted and installed 8.10 and still have the same issue. I did some searching and found some stuff about Power Play issues but I am not sure if that could be it and why it would all of a sudden cause a problem. I am also pretty sure that it is not my PSU since it worked before. So any help is appreciated.
Since I have received my two VisionTek 4870s I have been running some benches. The first day I ran 3DMark03, 05, 06, and Vantage with one card. I then ran them again in Crossfire. I both cards worked great and I could obviously tell that everything was working as it should. After running my crossfire tests I went to disable crossfire and my screen became all scrambled. I could not see anything so I reset my pc and crossfire was disabled and that was that for the night.
The next day I decided to play with some overclocks on the cards. I first ran the benchmarks on one card and then in crossfire and again everything was working great. Again when I was finished I disabled crossfire and the screen went all scrambled. So once again I reset the pc and it came back up and crossfire was disabled.
Now here we are at yesterday. I decided to run some more benches just in crossfire mode and for whatever reason it would not work. For example Vantage had these crazy streaks in Jane Nash and I was getting something like 12 - 18 fps. So I stopped it and took a look at CCC and made sure that I enabled Crossfire. Sure enough. I also took a look at GPU-Z and it also showed crossfire enabled. I disabled crossfire to run a single card to see if that would work and of course when I disabled it the screen once again became all scrambled and I had to reset. However, once it came back up I was able to run Vantage and 06 on a single card with similar results to what I have been getting. Then I enabled crossfire again and I still had the same problem as before. With a single card I can get 10,000. With two cards now I am getting about 7800 in Vantage, whereas before with two cards I was getting about 13700. Something is definatly wrong I just do not know what it is.
Also this was all done with the 8.11 drivers. After going through all of this I uninstalled, booted into safe mode and ran driver cleaner, rebooted and installed 8.10 and still have the same issue. I did some searching and found some stuff about Power Play issues but I am not sure if that could be it and why it would all of a sudden cause a problem. I am also pretty sure that it is not my PSU since it worked before. So any help is appreciated.
