PowerColor : Graphics, Multimedia Cards, Motherboards, Cases, Power Supply

Please check the following conditions:
1. Overclock : If you have made your CPU/memory running at a higher speed, please change it back to normal speed; because the power supply could not accept this kind of loading when you install a new VGA card on the system.
2. Power Supply : We've always suggested a power supply with 350W~400W for most AGP series products, so you might need an equivalent or higher power supply. If this VGA card includes an external power connector, please make sure the power supply connects to the vga card ONLY. We do not suggest you to connect the same cable with other devices like HDD/CDROM.
3. System Memory Config : Please try to install your DIMM moudle to a different slot of your mainboard. We have received some feedback that the system works in AGP 8x after users have changed the DIMM to another brand, or changed the slot.
4. Driver/Bios of Mainboard : Please check and update the driver/bios of mainbnoard, and make sure the bios/driver of mainboard is working with the latest version. In some cases, you might need to check with the mainboard chipset vendor ( VIA / NV / intel .... ) to make sure the driver has updated to newest version.
You could try to change these bios setting of your mainboard ---
AGP fast write: Disable; AGP aperture memory: 128MB or 256MB; AGP voltage : 1.6V ; AGP 3.0 Calibration Control : disable

Because the components on display card are fixed, it is totally unnecessary to regularly update the BIOS of display card. Mainboard may need to update BIOS for its compatibility with new CPU, DRAM, peripheral devices, and etc. Display card BIOS updates are required only for bug fixing or other special cases. It happens rarely. Please note, we do not suggest users to update BIOS with image files that are available on Internet. It is highly likely that those image files are not compatible with your display card at all; and your display card may not work any more after such update. You would void the warranty of display card at the same time.

This issue may be due to Microsoft Windows allocate less AGP resource than minimum requirement of ATI display driver.
Please refer to ATI official webpage for more info & solution, visit: http://www.ati.com/support/infobase/4217.html 

This issue may be due to Microsoft Windows allocate less AGP resource than minimum requirement of ATI display driver.
Please refer to ATI official webpage for more info & solution, visit: http://www.ati.com/support/infobase/4217.html 

Instruction:
1. Download this file 'direcpll.dll' from the given link, ftp://driver1.cptech.com.tw/driver/3dmark03/direcpll.dll
This downloaded file includes required support for X800XT PCIE VGA card.
2. Replace the downloaded file with the old file in the following directory -- '\windows\system32\futuremark\msc\'
For more information, please visit http://www.ati.com/support/infobase/4523.html

It is due to the limitation of TV resolution and compressed S-Video (Composite) format. The resolution for generic TV is much lower than generic computer monitor.
[NTSC (525 horizontal scan lines)/PAL (625 horizontal scan lines) compares with computer resolution 1024x768 (768 horizontal scan lines)]
Also, S-Video interface is an analog compressed format.  Composite is a further compressed format based on S-Video interface (Y and C signal of S-Video is compressed into one signal of Composite ).  So, when you try to view computer display on generic TV. The image quality will suffer from lower resolution of TV and signal loss via compressed signal interface. The only advantage for TV output is generic TV screen size is much bigger than generic computer display device.

Please check the websites below for the latest updates:
ATi Linux Driver Downloads http://www.ati.com/support/drivers/linux/radeon-linux.html
ATi Linux driver FAQ http://www.ati.com/support/faq/linux.html