They all have the same temp drop! probably bios related.
This worked for me! I now have both fan speeds. Be sure to use the drop down window for 3D adjustment, I did not notice this at first and it would lock up in testing.
My card runs stable @ 415 core and 1250 mem. And I used the method below (thanks) that was submitted by someone else.
OK. Here is how I did it; first, go get the nvflash 5.10 from
http://www.guru3d.com/newsitem.php?id=1998, then get the latest eVGA 6800 Ultra bios from
http://www.mvktech.net/index.p...older&filecatid=51 (there are Rev.1-4 eVGA 6800U bios available to download there, but I used the latest one, which is Rev.04). Once you got both, make a DOS boot disk, then copy the nvflash and bios to the disk. Then reboot the comp.
Once you reboot, and go into <A:\>, you first type in "nvflash -b <filename>.rom" to BACK UP your original bios, then you type in "nvflash -5 -6 <filename of the new bios).rom", then your 6800 limited edition will be flashed to 6800U with 425/1100 setting. Beware that you will have to use the "-5 -6" command to force flash the bios to your card; your 6800 limited edition was force strapped to 6800NU by eVGA initially, if you use the regular common "nvflash <filename of your new bios>.rom", the nvflash will respond with something like hardware ID doesn't match and subsystem ID doesn't match, and your card will not be flashed. Once your is flashed, reboot your comp, reinstall 66.81 driver, then you got yourself a regular 6800U. So, good luck to whoever are trying to do this, and enjoy your new card!!!