Hi, I have a problem that nobody here seems to have ever seen, I tried everything, forums, helpdesks, experts-exchange, ATI support, ASUS support and nobody can help me:

I bought a brand new RADEON 9800 PRO R350 and I see flickers in 3D applications and lines coming from the center of the screen. It happens in every 3D applications, screensavers, games. See an example in a 10 seconds video:
http://etudiant.tim.cstj.net/2001/9956138/flickers.mov

Here's what I tried:
-Cleaning OLD ATI 9000 drivers with Driver cleaner
-Installing latest AND old drivers from the ATI 9800
-Installed original BIOS and updated BIOS
-Clearing the CMOS with the jumper on the motherboard to restore factory defaults
-Unplugging the floppy, both CD-ROMS, one hard drive, all USB DEVICES, the printer and every PCI device to save power for the vga adapter
-Tried a power supply calculator: http://www.jscustompcs.com/power_supply/ to see if My power supply was alright: I need 315 Watts and my power supply is 350 watts.
-Formatting and reinstalling Windows
-Return the graphic adapter to the store to have a new one
-Trying every possible combination of voltage and settings for the AGP slot in the BIOS
-Remove every single particle of dust in the AGP slot with vaccum cleaner

THE ONLY THING THAT WORKED:
When I overclock my computer to an impossible combination in the BIOS, then the computer starts and says:
Overclocking failed
F1 - Run setup
F2 - Default settings

When I hit F2, everything works! but my CPU speed is 1300 MHz instead of 2600 and as soon as I
restart my computer, the flickering starts again, even if I don't! run setup during booting
you can find a COMPLETE resume of my comp uter at this address:
http://etudiant.tim.cstj.net/2001/9956138/report.htm

In this small section of the report:
http://etudiant.tim.cstj.net/2001/9956138/agp.htm
You can see that it says the AGP slot is EMPTY
So it would seem the problem comes from the motherboard

I've been writing to both ATI and ASUS for a month, but they don't seem to care since they don't know how to solve the problem and they always answer with stupid answers and things that I TOLD THEM I already tried, or they tell me to install the latest driver!! As if I did everything I did but never thought of intalling the latest driver!  then they pass the problem to another person, and that person tells me to install the latest driver, so it's getting nowhere.

That the very first time I don't see the light at the end of the tunnel, usually, I always have a plan B, but now, If you guys can't help me, I have absolutely no idea what to do, it's too late to return the RADEON 9800 now, ATI and ASUS were too slow and it's been a month since the date of purchase so I can't retrun it, I have to deal with it.

Here's a short report of my computer ASUS asked me for
*Product Type : Motherboard
*Product Model : P4C800 Deluxe

[Motherboard Specification]
*Motherboard Revision : 1.03
*Motherboard BIOS Revision : 1011
< br>[VGA Card Specification]
*VGA Card Vendor : ATI
*VGA Card Model : Radeon 9800 pro R350 128MB
*VGA Card Chipset : ATI
*VGA Card Driver : vga.sys 5.1.2600.1106

[CPU Specification]
*CPU Vendor : Intel
*CPU Type : Socket 478
*CPU Speed : 2600 MHz

[Memory Specification]
*Memory Vendor : Unknown
*Memory Model : DDR SDRAM
*Memory Capacity : 1024 MB

[HDD Specification]
HDD Vendor : Seagate
HDD Model : 3JT0GNZL & 3JT0GNV! G
HDD Capacity : 2 X 120 GB

*Operating System : Windows XP PRO

If nobody can help me, do you have a least an idea what to do, like giving me the address of someone you know and who knows A LOT about computer, because I really need a complete expert.

Thanks for at least reading this hehe
run diagnostics>>http://www.active-hardware.com/english/misc/sandra.html

overheating/overclocking/bad chip etc...maybe directx...is the cause?try using 8.10...maybe the p4 is to fast for the program used...have a  look a cpu killer../\i downloaded the software, but I have no idea what to do with it, it looks pretty muck like Everest, the software I used to build the full report I posted.

And my cpu is alright, all 3D applications ran perfectly with my old RADEON 9000, the problems began when I installed the RADEON 9800. and I have the latest 9.0c version of directxor, did you meant intalling directx 8.1 ?
if so, this is a little weird, since a lot of 3D applications need at least directx 9.0 so if it worked, I would not be able to use all applications Quote

...
1.  I need 315 Watts and my power supply is 350 watts....

2.  THE ONLY THING THAT WORKED:
When I overclock my computer to an impossible combination in the BIOS, then the computer starts and says:
Overclocking failed
F1 - Run setup
F2 - Default settings

When I hit F2, everything works! but my CPU speed is 1300 MHz instead of 2600 and as soon as I
restart my computer, the flickering starts again, even if I don't! run setup during booting...

Here's what I tried:
-Unplugging the floppy, both CD-ROMS, one hard drive, all USB devices, the printer and every PCI device to save power for the vga adapter

1.Can't be the power supply, I unplugged almost everything:
There was only a hard drive, the processor, 2 memory chips, the mouse, the keyboard and the graphic adapter, is it really possoble that the power supply is that bad?

2.You perfectly understood, that like if I reset my CMOS with the jumper on the motherboard, every specs is then set to default, but If i look at the system properties, the CPU speed is at half-speed. And as soon as I reboot, everything is back to normal: CPU normal speed, graphic adapter all ?#$? up

...
It looks like there are always two options:
1-The CPU is normal but the RADEON is not
2-The CPU is not normal but the RADEON is...