Not every board is the same, not ever CPU/memory combination responds in the same manner. This guide is not intended as a 'Set-it-and-Forget-it' solution. As with all overclocking, user participation and thought is still required.





Generally most of Allendales and Conroes are fully capable of an FSB between 350 and 400. It would seem to me that more often that not, barring any other complications, these processory are capable of that mark. As well, it has appeared that mostly, that FSB point can be reached with modest increases in core voltage and modest aftermarket air cooling. That said, most of the problems are coming from various motherboard and/or memory related instabilities and misconfiguration.

-- Complete Failure to go Past 280-300 FSB using bios 0507

Please remember that in 0507, there appears to be a divider issue with certain memory. Check and make sure that your are not currently running your memory with a divider, and if your are, try it without. If you must use a divider, downgrade your bios to 0502.

-- Multiplier Fluctuation

This is a commonly overlooked detail by those jumping in to the P5B-D. By default, The P5B-D bios revisions enable settings in the CPU Configuration of your bios that dynamically adjust the multiplier of your processory to conserve heat and energy. You can disable it by disabling the C1E and SpeedStepping options.

-- "Chassis Intruded!" Message; CMOS-Clear and Chassis Intrusion Jumpers

If you are getting a "Chassis Intruded!" message upon trying to boot, you will be unable to do anything whatsoever. As reported, to fix this, you must clear CMOS via an on-board jumper. Refer to your manual and locate the jumper, and be very careful, as the Chassis Intrusion jumper is right next to it.

-- Double-restarts, Power fluctuations, Fake-restarts, etc.

Many users are experiencing a supposed problem in which cold booting or rebooting the system will trigger an immediate reboot after the initial one occurs. It is not known whether or not this is something that is user-generated or not, though some users have reported it occuring at stock, right out of the box. It is also not know whether this could be detrimental in any way to the user's system.

-- Default vDimm and Higher Rated Memory Voltages

By default, all bios revisions (I believe) will have the memory voltage at 1.8v. This may cause an issue with some memory that is rated for 2.0v-2.1v or higher. Some users have experienced success using 2.0v or 2.1v modules at stock and then changing the vDimm on the bois, while others have not. Generally, the best way to combat this problem is to find a stick of memory that's rated at 1.8v-1.9v and boot with it. Once that's accomplished you can alter the vDimm in the bios to a bootable level for your other memory.

-- Wifi-AP Functionality and WXP 64-bit

If you are experiencing wireless connection issues using Windows XP 64-bit (and quite possibly 32-bit) and the P5B-D Wifi-AP Card/Antenna, try downloading the driver from the Asus Support Website. Download the same exact driver as is on the CD, the only difference is, the driver is unsigned, and Windows will need confirmation before continuin the install an unsigned driver.

-- PLL for ClockGen ADDED: 09/15/06

Firstly, you'll need the beta version of ClockGen that adds support for the P5B-D. In the PLL setup section, choose CY28551 (it shouldn't automatically detect it).


Would like to add this-

Processor: E6300
Bios Revision: 0507
Memory: G.Skill 6400HZ
Configured Voltages: 1.45v vCore, 1.40v vFSB, 1.25v vNB, 1.70v vSB
Configured FSB:486
Configured Ratio: 1:1
Configured Memory Timings: 4-4-4-8

These are about the right settings you are going for when overclocking a conroe.

Thanks to XS for the information.

If you need any help please post a thread giving your computer specs and the problem and a we will do our best to reply promptly and help as much as we can, or if you have any further information we could add to this post please PM a moderator.

Thanks and happy overclocking.