Quote Originally Posted by ChaosMinionX View Post
Explanation of that could be that the XT is looser timings to run higher speeds like it should be. If you matched XT speeds it would probably be doing better.
On XT BIOS I noticed more very short look ups and shattering during 3D Mark session and it reacted with even more look ups after PCIe speed increase. On PRO BIOS though 3DMark is much smoother and card likes higher PCIe.

(lock up - 0.5 to 1.5s pause)

PS. My personal 3DMark06 RECORD!