My best results so far:
After trying laptopvideo2go 76.41 drivers, I went back and tried XG drivers. They can be overclocked as well. I've always had the best scores with the XG 76.10 drivers.
I used the Auto-Overclocking setting in the Nivdia Control Panel. For some reason if you try using Manual Overclocking, the settings don't hold.
Stock Core Settings: 450/1063.1
Auto-Overclock Core Settings: 546.8/1063.1
Before 3DMark05 Run GPU Core Temp: 48deg
Highest 3DMark05 Run GPU Core Temp: 71deg (Picture below shows 48deg, but during the 3DMark05 run, 71deg was the highest I saw)
Quality (Default Settings)
Sorry I didn't take a screenshot when I had the chance.
See picture below.
The ONLY way I was able to achieve this was to run Fangui and have the fans running continuously. Even so, Fangui is only able to keep the left fan running on high. The right fan which is closer to the GPU cannot be controlled directly by Fangui.
The XPS2 runs EXTREMELY HOT when overclocking. I was only able to achieve 1 run of 3DMark05 each time, then I had to let my XPS2 cool down for 10 minutes before attempting another run. If I ran 3DMark05 consecutively, even with the Fangui fan control at the highest settings, my system would crash every time.
As expected, the 6800 Ultra is pretty near maxed out as it. I think everyone who been trying to overclock their 6800 has been seeing crashes after the first couple of scenes in 3DMark05 because of the heat issues.
The highest temp reading I've seen while running 3DMark05 was 71deg. Somewhere above this temp, the system will just lockup or reboot. The final temp in 3DMark05 shows 48deg, but this is only because the last scenes require less rendering power from the GPU, therefore less temp.
Another note about Fangui fan control was that it was inconsistent. I used both the Direct fan control settings and the Temp control settings, but during runs of 3DMark05, the fan would still slow down intermittently and then restart up back to full. This is not something you would want if you wanted to keep your GPU cool.
I'm sure it'll be possible to hit 3DMark05 6000, but the heat issues are insane. We are talking thermal meltdown here.
I'll put my XPS2 in the freezer, and try another 3DMark05 tonight.
Anyone still trying to overclock their 6800 Ultra, should CLOSELY watch their Core Temps. I would tend to trust Nvidia and Rivatuner's reported temps more than Fangui.