How To Fix The PCI Express x1 Bug

NormCameron · Nov 8, 2008

I don't know how relevant this is to any of the viewers of this thread, but It relates to an overclocking bug and it's fix. Somebody might find it useful.

"How To Fix The PCI Express x1 Bug
The reason why I wrote this article is simply because I have seen many whom had their motherboard's PCI-Express bus width stuck at x1 while overclocking. This is especially seen on the ASUS P5B series. So today, we are going to find out what will work and what won't, as well as their impact on gaming and HD video playback.
Motherboards that might be affected include :

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

Graphics cards that might be affected include :

ATI Radeon X1950 Pro
ATI Radeon X1950 XT
NVIDIA GeForce 8800 GT

Solutions that do NOT work :

Setting the PCIE Bus Frequency to 96 MHz
Setting the PCIE Bus Frequency to 101 MHz
PCI Synchronization Mode to 33.33 MHz
Updating the BIOS

Solutions that work :

Disable "PEG Force X1".
Set the NB Vcore to 1.45 v or below.
Overclock or underclock the PCI Express reference clock (up to 15 MHz either way). More details here - PCI-E Reference Clock."

Tech ARP - How To Fix The PCI Express x1 Bug Rev. 3.0

How To Fix The PCI Express x1 Bug

NormCameron

My Computer

System One