ASUS MATRIX 5870 P/2DIS/2GD5 Windows 8 64-bit Drivers
BIOS
VGA BIOS for ASUS MATRIX 5870 Series Limit clock range is changed from 1200e/1400m to 2000e/2000m.
MTP.rar is for MATRIX 5870 P/2DIS/2GD5 : AS07 ->AS11 (default clk 894e/1200m)
MT.rar is for MATRIX 5870/2DIS/2GD5 : AS09 ->AS13 (default clk 850e/1200m)
Please choose the right BIOS file and run it under windows to update your VGA BIOS. And also you need to update your iTracker to i-tracker2 v1.6. Download
VGA
ATI Display Driver 9.002WHQL for Win8 32/64 Download