How To Fix The PCI Express x1 Bug

[Dashken]

User of ASUS and Gigabyte motherboards (maybe others as well) may be affected by a PCI Express x1 bug which causes a tremendous drop in performance. ChampionLLY takes a look at the motherboards and graphics cards affected by this problem and what solutions work, and what doesn’t.

In the second part, he takes a look at the effect that PCI Express x1 bug has on the performance of your system. The results will shock you.

Here are the latest updates in Revision 3.0 :-

- Added a new method on how to fix the PCI Express x1 bug.
- Various corrections and updates throughout the guide.

Link : How To Fix The PCI Express x1 Bug Rev. 3.0

[vaan009]

I haved mainboard Gigabyte 965P-S3 Rev 3.3,VGA Sapphire HD4850 and I am still seeing the x1 bug.How can you fix the PCI Express x1 bug of this mainboard?

Thank you,

[someguyfromhell]

Hi Dasken,

There is a mistake with your guide

Motherboards that might be affected include :

* ASUS P5B
* ASUS P5B-E Plus
* ASUS P5B Deluxe/WiFi
* ASUS P35C-DS3R
* Gigabyte P35-DS3L

There is no Asus P35C-DS3R. Only Gigabyte uses the Pxx-DSx naming scheme. Here's the link:

GIGABYTE - Product - Motherboard - Overview - GA-P35C-DS3R (rev. 2.1)

Hope you fix it

[Adrian Wong]

Originally Posted by someguyfromhell

Hi Dasken,

There is a mistake with your guide



There is no Asus P35C-DS3R. Only Gigabyte uses the Pxx-DSx naming scheme. Here's the link:

GIGABYTE - Product - Motherboard - Overview - GA-P35C-DS3R (rev. 2.1)

Hope you fix it

Hey, thanks for the heads-up! Correcting it now.

[Adrian Wong]

Originally Posted by vaan009

I haved mainboard Gigabyte 965P-S3 Rev 3.3,VGA Sapphire HD4850 and I am still seeing the x1 bug.How can you fix the PCI Express x1 bug of this mainboard?

Thank you,

Have you gone through the various fixes we mentioned?

[weezy]

I have, this problem is insane, tried everything imaginable and i know its the motherboard not setting things correctly.

[Adrian Wong]

Originally Posted by weezy

I have, this problem is insane, tried everything imaginable and i know its the motherboard not setting things correctly.

Hmm.. Have you contacted Gigabyte about this??

[RobA]

Hey there, I have had this problem for a little while but decided to have one last look on the internet and found this discussion.

I have got a Asus P5K-E WiFi/AP, BFG 8800 GTS 512, Crucial Ballistix Tracer, I have tried setting the NB voltage to 1,40 V as that is the only thing lower that 1.45. I have also tried setting the PCI-E regerence clock to 115 but still no luck. I have tried disabling the PEG Force X1, and it is still as x1.

Hopefully someone can help.

Also I have not overclocked the PC.

Would I be able to send it back to where I bought it from or would they tell me that its something that I can't send it back for?

[Adrian Wong]

Originally Posted by RobA

Hey there, I have had this problem for a little while but decided to have one last look on the internet and found this discussion.

I have got a Asus P5K-E WiFi/AP, BFG 8800 GTS 512, Crucial Ballistix Tracer, I have tried setting the NB voltage to 1,40 V as that is the only thing lower that 1.45. I have also tried setting the PCI-E regerence clock to 115 but still no luck. I have tried disabling the PEG Force X1, and it is still as x1.

Hopefully someone can help.

Also I have not overclocked the PC.

Would I be able to send it back to where I bought it from or would they tell me that its something that I can't send it back for?

IMHO, if you can show them that the board's stuck at PCI Express x1, they should replace it with a different motherboard. Running any graphics card at PCIe x1 is ridiculous.

I know you tried reducing the NB voltage, but have you tried increasing it above 1.5V?

[PsYkHoTiK]

@Roba: I run a P5K Premium with a eVGA G92 8800GTS 512 and I don't have the problem.

Man I was just about to go ZOMG don't tell me this is strike three from my Asus mobo!

Good thing my GPU is happily running @ 16x.