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Locking pixel quads on Radeon X850 XT PCI Express... - 2007/06/09 16:55 Hello, I am a newbie. Okay, here is the issue... I bought a ATI Radeon X850 XT PCI Express card from a guy on AT for like $20 shipped and it artifacts like mad. I was told it artifacted before I bought it but he made it sound like it wasn't this bad. I'm assuming it's the core having this problem, but I'm wondering if it will be worth a shot to lock down 1 or 2 pixel quads turning it into a Radeon X850 PRO or GT...

What I need for this though are stock Radeon X850 PRO PCI Express BIOS from software locked Radeon X850 PRO's so I can try to lock the quads on the Radeon X850 XT down one at a time, to do this I'll be needing four separate BIOS's, one for each of the quads on a R480 core. To clear that last bit up I'll need one BIOS with Quad One locked on a software locked Radeon X850 PRO, one with Quad Two locked on a oftware locked Radeon X850 PRO and so on and so forth.

The X850XT artifacts too bad to do anything through Windows as even the boot screen is garbled beyond belief. If anyone has a BIOS I can use please send them to me. Any help with this would be greatly appreciated.
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Re:Locking pixel quads on Radeon X850 XT PCI Express... - 2007/06/10 09:34 Euh, what you want is as far as I know not possible. Just try one of the Radeon X850 PRO BIOS's which will lock one pixel quad but which one that is not specified in the BIOS... At least that is what I know of it. But I don't think that will be the issue. Artifacts are coming in the first place from having overclocked the memory too high for just a bit too long causing permanent damage to the chips. What you need to try first is to get the BIOS of your card and then set lower clocks speeds on both core and memory. If that doesn't help then I am quite confident the memory chips are just damaged...
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Re:Locking pixel quads on Radeon X850 XT PCI Express... - 2007/06/10 14:54 Heya, I can only recommend this or a similar guide. Maybe it'll help as the card was cheap anyway. Just check it out and see what you can do or maybe fix with this.
Radeon X800 GTO and GTO˛ to Radeon X850 XT Update...
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Re:Locking pixel quads on Radeon X850 XT PCI Express... - 2007/06/11 08:46 rama_desu wrote:
Heya, I can only recommend this or a similar guide. Maybe it'll help as the card was cheap anyway. Just check it out and see what you can do or maybe fix with this.
Well this might work, or maybe make a difference, but as I said it will be most likely the memory that is damaged and not the core itself, unless it is not a real Radeon X850 XT, but another card that was modified and flashed to the Radeon X850 XT version...
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