Well, by the way, it's not really only "As I heard", I actually have stability problems with VIA chipset drivers..

So any clue on 4-in-1 driver versions?

The latest one is fine for stability on a PT880. 5.14 is the next go-to if you have any issues with it. Install the chipset and AGP drivers one at a time, you don't need IDE or RAID. The chipset installer will say it failed, but reboot it and all the drivers will appear. Unless you're using a PCIe GPU, you may run into this AGP Memory bug present in the 98 AGP drivers for the PT880 and K8T800. You should be able to downgrade your BIOS to fix it though.

Hi VDNKh, thanks a lot for your reply.

I was reading the link you posted above.

Regarding the bug, I have Ati Radeon 9550 GPU - 128 Bit 256 MB, not an Nvidia one, does it differ here? And the chipset is PT800, not a PT880.

In order to downgrade, I plan to use afudos.exe under MS-DOS, I think I did that once, downgraded from 1009.008 Beta Version to 1008.

What's the suggested BIOS version? I guess it seems 1005 is the latest recommended one?

Here's my motherboard's BIOS list:

https://www.asus.com/supportonly/p4v8xx/helpdesk_bios/

Many thanks once again.

deksar wrote on 2022-11-29, 18:30:

Hi VDNKh, thanks a lot for your reply. […]
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Hi VDNKh, thanks a lot for your reply.

I was reading the link you posted above.

Regarding the bug, I have Ati Radeon 9550 GPU - 128 Bit 256 MB, not an Nvidia one, does it differ here? And the chipset is PT800, not a PT880.

In order to downgrade, I plan to use afudos.exe under MS-DOS, I think I did that once, downgraded from 1009.008 Beta Version to 1008.

What's the suggested BIOS version? I guess it seems 1005 is the latest recommended one?

Here's my motherboard's BIOS list:

https://www.asus.com/supportonly/p4v8xx/helpdesk_bios/

Many thanks once again.

Damn I'm getting dyslexic. The bug affects all AGP GPUs regardless of make. I actually don't know if that bug affects the PT800 chipset though. Try it without downgrading BIOS. You'll know if you have the bug or not when you open 3DMark01 and see under System Info that you have 0 bytes of AGP memory

Okay, I think I have the same bug.

But it was disappeared after downgrading the BIOS, from 1009.008 to 1005.

Here are the screenshots;

3DMark01: Before downgrading the BIOS, total AGP memory was: 0 bytes.

3DMark01: After downgrading the BIOS, total AGP memory is as shown above.

GPU Card Properties Window: Current AGP Speed: was Disabled, it's now 8x Enabled after downgrade.

Dxdiag: "AGP Texture Acceleration" was Disabled, it's now Enabled after downgrade.

deksar wrote on 2022-11-29, 19:49:

Okay, I think I have the same bug.

But it was disappeared after downgrading the BIOS, from 1009.008 to 1005.

Yup that's the bug. I guess that's one more affected chipset to add to the list.

What about the K8T800?

Cheers,

pentiumspeed wrote on 2022-11-29, 23:48:

What about the K8T800?

Cheers,

Yes the bug is present there too. Downgrading the BIOS also fixes it.

VDNKh wrote on 2022-11-30, 18:13:

pentiumspeed wrote on 2022-11-29, 23:48:

What about the K8T800?

Cheers,

Yes the bug is present there too. Downgrading the BIOS also fixes it.

But the board is not Asus, this one I have is a Fujitsu Siemens motherboard with K8T800 chipset, does this still have this bug?

Cheers,

pentiumspeed wrote on 2022-11-30, 20:59:

But the board is not Asus, this one I have is a Fujitsu Siemens motherboard with K8T800 chipset, does this still have this bug?

Cheers,

Very likely as it affects all makes of motherboards as far as I know. It's trivial to check just by seeing if you have > 0 bytes of AGP memory in 3DMark01, or in DXDiag sometimes it will report AGP texture acceleration will be disabled too.