Go Back   Tech Support Forum > Hardware Support > Motherboards, Bios & CPU

Unknown CPU detected

This is a discussion on Unknown CPU detected within the Motherboards, Bios & CPU forums, part of the Tech Support Forum category. I have upgraded my pc with ASUS P5n72-T Premium motherboard and Intel (R) Core (TM) 2 CPU 3.00 GHz E8400


Closed Thread
 
Thread Tools Search this Thread
Old 11-20-2008, 04:29 PM   #1
Registered Member
 
Join Date: Nov 2008
Posts: 1
OS: XP Pro Service Pack 2


Roll Eyes

I have upgraded my pc with ASUS P5n72-T Premium motherboard and Intel (R) Core (TM) 2 CPU 3.00 GHz E8400 processor. When I boot the pc up I get the following error message:

"Unknown CPU detecetd BIOS Update is required to unleash its full power"

I can't go further than this. If I press F1 it brings me back to the error message. If I press DEL it takes me to BIOS update page.

OS on my pc is : Win XP Pro SP 2

Has anyone had similar problem?
Can any one assist me in fixing this problem?
How do I update BIOS?

Thank you.

__________________
Sonali98 is offline  
Old 11-20-2008, 04:33 PM   #2
TSF Team, Emeritus
 
Join Date: May 2005
Location: USA
Posts: 24,229
OS: XP Professional



Some boards require a bios update to support the latest CPU. Therefore, at times one has to get a slower CPU and flash the bios before you can use the newer one. I know, it is a PITA, but we see that quite often and I suspect this is where you are with this one.

If a friend or neighbor has an older CPU you can use to flash this bios, then give that a try before you put this one back in.

__________________
Tumbleweed36 is offline  
Old 02-22-2009, 10:37 AM   #3
fer
Registered Member
 
Join Date: Feb 2009
Posts: 1
OS: xp sp2


Roll Eyes

Quote:
Originally Posted by Sonali98 View Post
I have upgraded my pc with ASUS P5n72-T Premium motherboard and Intel (R) Core (TM) 2 CPU 3.00 GHz E8400 processor. When I boot the pc up I get the following error message:

"Unknown CPU detecetd BIOS Update is required to unleash its full power"

I can't go further than this. If I press F1 it brings me back to the error message. If I press DEL it takes me to BIOS update page.

OS on my pc is : Win XP Pro SP 2

Has anyone had similar problem?
Can any one assist me in fixing this problem?
How do I update BIOS?

Thank you.
__________________
fer is offline  
Old 02-22-2009, 11:33 AM   #4
TSF Team, Emeritus
 
Join Date: May 2005
Location: USA
Posts: 24,229
OS: XP Professional



Before we get any further, clear the cmos and see if it recognizes the CPU for what it is. If that doesn't help, then we can move on to look at other things.

Here are instructions:

Clearing The CMOS

Clearing RTC (Real Time Clock) RAM:

  • Turn OFF the computer and unplug the power cord.

  • Remove the onboard motherboard battery.

  • Move the Jumper Cap from pins 1 & 2 (default) to pins 2 & 3. Keep the cap on pins 2 & 3 for ten seconds, then move the cap back to pins 1 & 2.

  • Reinstall the Battery.

  • Plug in the power cord and turn on the computer.

  • Hold down the DEL key and enter the bios setup menu to re-enter data.
Notes: Some motherboards use different key combinations to enter the bios setup menu.

There are also some motherboards that you can simply push a button to achieve the same as moving the jumper from pins 1 & 2 to pins 2 & 3 and then moving the jumper back.

In addition, there are some boards that you simply use a screwdriver to short across the two jumper pins (no jumper), but this serves the same a removing the jumper and replacing it to adjacent pins.
__________________
Tumbleweed36 is offline  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is on
Smilies are on
[IMG] code is on
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Post a Question


» Site Navigation
 > FAQ
  > 10.0.0.2


All times are GMT -7. The time now is 08:44 PM.


Copyright 2001 - 2014, Tech Support Forum

Windows 7 - Windows XP - Windows Vista - Trojan Removal - Spyware Removal - Virus Removal - Networking - Security - Top Web Hosts