Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Will a P4 processor w/a 533 or 800 fsb operate in a 400 fsb mobo?

Posted on 2006-11-29
5
259 Views
Last Modified: 2012-05-05
Hi Guys! I'm back & just as stupid as ever!! My problem is that I have a Compaq Presario 6000T circa 2003. The power supply & processor have both failed. I am having a very difficult time finding a replacement 2.53gh P4 processor for a Micro-Star MS-6577 motherboard with a 400 mb fsb. My instincts say that I can install a 533 or 800 fsb P4 processor in this socket 478 beauty as I have used 100's in 66's & 133's in 100's with no apparrent problems. I just want to make damn sure I get this right. This mobo is very particular about what it will accept. I have a couple of socket 478 2.13gh Celerons, but they aren't compatible. The only 2.53gb's I can find are at least 533's. I suspect that this was one of Compaq's proprietary job lot mobo's. Can you help me?

Signed....The Griz
0
Comment
Question by:thegriz
5 Comments
 
LVL 17

Expert Comment

by:RDAdams
ID: 18045572
Never tried....sorry.
0
 
LVL 30

Expert Comment

by:pgm554
ID: 18046314
The main issue would be BIOS.

What makes a Compaq a Compaq is the BIOS.

They farm out the boards,but Compaq has a proprietary BIOS.

 The Compaq MOBO would need to be able to read the microcode embedded in the chip to figure out how to work with it and if it doesn't recognize it,it may or may not work.

A flash could make it work,but you would need to go to Compaq(HP)site and research.

0
 
LVL 9

Accepted Solution

by:
PeterMac earned 500 total points
ID: 18047019
MS 6577 Motherboard is purely P4 support thats why Celeron wont work. Will support 533 FSB Processor. So should be OK with P4 2.53/533 but as pgm554 points out no Guarantee Compaq have retained all original capabilities.

You may find link below useful - grab it quick - may not be around later.

http://www.emeyer.co.uk/temp/xenon3_manual.pdf
0
 
LVL 30

Expert Comment

by:pgm554
ID: 18047462
The killer for most new CPU's is the match between the CPU stepping code and the BIOS.

If the BIOS can't use the stepping code,the MOBO combo is useless.

Kind of how this works,is that when CPU's are manufactured,they,(like software),have bugs.

These bugs are fixed with newer revs of the CPU (stepping),the BIOS must also be fixed(flashed)to match the new stepping bug fixes.

So even if the new CPU is supported,it may not work unless there is a compatible flash.

This might not be apparent right off the bat,because it may work,but you might experience issues with things like hangs and BSOD's.

So now that you have been warned...
0
 
LVL 3

Expert Comment

by:redlighttraitor
ID: 18055275
533 and 800 fsb CPU's usually WILL work on a 400fsb mobo. The problem however is that the cpu will run at a lower clocked speed. If you have a 3.0ghz 800fsb running on a 400fsb motherboard, that 3.0ghz will most likely show up as a 1.5ghz since only 400fsb of it can be "detected" and "used".
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

If you get continual lockouts after changing your Active Directory password, there are several possible reasons.  Two of the most common are using other devices to access your email and stored passwords in the credential manager of windows.
Gift cards are not a new concept - it's been around for a very long time.  Undoubtedly, over the past you have received such a card or purchased one for a friend or relative.  Are you aware that you've been feeding the machine?  If not, read on :)
Notifications on Experts Exchange help you keep track of your activity and updates in one place. Watch this video to learn how to use them on the site to quickly access the content that matters to you.
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question