Strange behaviour on modded X800Pro !

danx · Nov 11, 2004, 02:11 PM

My softmodded ATI X800Pro card works nicely with 16pipes and at XT PE speeds+.

But sometimes when I try to change the GPU or memory clocks by ONLY 1 MHz I get a corrupted screen/artifacts and have to do a reboot.

It also happens when I lower the clock speeds by one MHz increments.
( underclock to speeds below XT/PRO whatever )

I'm not looking for a O'C, I'm simply curious to know why !?

If I'm "lucky" I'm able to set it up to 542/583 without it crapping out.
And it runs stable at those speeds (no artifacts).
So it can't be that PE speeds are too much for it.

Does anyone have a clue to why it behaves like this ?

It runs without any artifacts for hours and with full AA / AF with ATITOOL.
(at "stock" 520/560MHz and higher once it "gets" there)
And no problems in any games.

But I'd really like to know why it sometimes cant handle ANY changes to the clocks ( GPU/MEM ) ??
Neither increases or decreases !

I flashed it using the "gigabyte" method first, but have since then flashed it with a modified flashroom.exe that flashes the "whole" BIOS memory area regardless (works very well and it's easier than the gigabyte method).
Didn't help though..

I've also tried 3 different bios versions, all compatible with my 1.6 samsung memory modules, just to see if it helped.
No change whatsoever though.

Any clues guys ?

Zebra · Nov 11, 2004, 09:53 PM

Probably needs the pencil volt mod. Otherwise, just leave it as is.

danx · Nov 12, 2004, 09:22 AM

Thanks, I was thinking about that too.

Nov 11, 2004, 02:11 PM	#1
danx DriverHeaven Newbie Join Date: Jul 2003 Posts: 5 Rep Power: 0	Strange behaviour on modded X800Pro ! My softmodded ATI X800Pro card works nicely with 16pipes and at XT PE speeds+. But sometimes when I try to change the GPU or memory clocks by ONLY 1 MHz I get a corrupted screen/artifacts and have to do a reboot. It also happens when I lower the clock speeds by one MHz increments. ( underclock to speeds below XT/PRO whatever ) I'm not looking for a O'C, I'm simply curious to know why !? If I'm "lucky" I'm able to set it up to 542/583 without it crapping out. And it runs stable at those speeds (no artifacts). So it can't be that PE speeds are too much for it. Does anyone have a clue to why it behaves like this ? It runs without any artifacts for hours and with full AA / AF with ATITOOL. (at "stock" 520/560MHz and higher once it "gets" there) And no problems in any games. But I'd really like to know why it sometimes cant handle ANY changes to the clocks ( GPU/MEM ) ?? Neither increases or decreases ! I flashed it using the "gigabyte" method first, but have since then flashed it with a modified flashroom.exe that flashes the "whole" BIOS memory area regardless (works very well and it's easier than the gigabyte method). Didn't help though.. I've also tried 3 different bios versions, all compatible with my 1.6 samsung memory modules, just to see if it helped. No change whatsoever though. Any clues guys ? Last edited by danx; Nov 12, 2004 at 07:23 AM.

Nov 11, 2004, 09:53 PM	#2
Zebra DriverHeaven Lover Join Date: Jan 2004 Location: California,USA Posts: 198 Rep Power: 0	Probably needs the pencil volt mod. Otherwise, just leave it as is. __________________ My current system as of 04/20/06: M/B: ABIT K8U Socket 754 RAM: 1024MB Corsair Select CPU: AMD Athlon 64 3700+ (Clawhammer) VIDEO: ATI Radeon AIW X800 XT 256MB AGP8X AUDIO: SB Audigy 2 DISK: Maxtor 7200rpm 200GB 8MB cache SATA drive DVD/RW: Sony DRU-800A DL Dual Format DVD/CD Burner CD/RW : TEAC 48X CD Burner OS: WIN XP PRO w/SP2 VID DRIVERS: Latest Omega Radeon Drivers PSU: ANTEC 500W

Nov 12, 2004, 09:22 AM	Thread Starter #3
danx DriverHeaven Newbie Join Date: Jul 2003 Posts: 5 Rep Power: 0	Thanks, I was thinking about that too.