Upgraded CPU not being recognized

By JustAGuy ยท 13 replies
Jan 20, 2005
  1. So I have a new (for my mobo) PIII 1G chip to replace my old 750MHz. The problem is that even when I put in the new chip it seems to only run at 750. I was told that it was a simple plug and play installation but that doesn't seem to be the case. I checked my mobo manufacturer to make sure the chip would work on my mobo, and that I had the right bios. Everything seems to be in order but no such luck. Any ideas?

    System Info:
    512 memory
    ASUS P3B-F
    BIOS 1008.004

    I do have CPU-Z and can take a screenshot if needed.
    Be gentle, I'm a noob. :angel:
  2. Paul

    Paul TS Rookie Posts: 58

    I am supprised you run a 750 on this board thats just about sqeezing it to the limit.Your board is a slot 1 and supported to run Celeron and Pentium III 450 to 550MHz CPU's and a little higher but not a 1 gig.boards that support 1 gig are cuv4x P3v4x and a few others,just keep the 750 and oc.
  3. RealBlackStuff

    RealBlackStuff TS Rookie Posts: 6,503

    I will step on sensitive toes again, paul. If you don't know what you are talking about, it is better NOT to offer advice.

    P3-1.0 GHz(slot1) IS supported on P3B-F, but only since mobo-revision 1.04 (what is yours?) and since BIOS 1008.001 (yours should be OK 1008.004).

    You can get the whole list here: http://www.asus.com/support/cpusupport/cpusupport.aspx and type in your mobo = p3b-f.
  4. JustAGuy

    JustAGuy TS Rookie Topic Starter

    How do I tell which mobo revision I have? Checking in the CPU-Z it says REV 1.xx, which I'm assuming is the revision. However, the I do not know whether the xx is actually a revision or if it's just having trouble reading the exact type. The manual revision is 1.05 but that doesn't sound like what I'm looking for. Thanks in advance for the help.
  5. RealBlackStuff

    RealBlackStuff TS Rookie Posts: 6,503

    Open your PC. Somewehere on the motherboard (between the PCI-slots) is the word Asus and the Motherboard type (P3B-F) printed. Nearby you should find the revision nr.
  6. JustAGuy

    JustAGuy TS Rookie Topic Starter

    Ah, thank you. It seems I have revision 1.04. So the question is, is that 'since mobo-revision 1.04' inclusive or not? And if so, what might be the problem. Again, thanks.
  7. RealBlackStuff

    RealBlackStuff TS Rookie Posts: 6,503

    You either have jumpers on the the mobo, or settings in the BIOS to tell it what CPU you have. Check the manual how the set the different multiplicators etc..
    Also, if your memory is PC66, that does not like the PIII. Try PC100 or even PC133
  8. JustAGuy

    JustAGuy TS Rookie Topic Starter

    I was hoping I wouldn't have to fool with the jumpers. Drats. Now I have to figure out how to set them, or change them to use this JumperFree mode because I don't see settings in my manual for a 1gig chip. It only goes up to 700Mhz. Or it might just be time to call in a tech-minded friend. Thanks for your help.
  9. Paul

    Paul TS Rookie Posts: 58

    tHEN get that 1 gig cpu running in that board for the person,Maybe he will reward you for all you know :haha:

  10. Didou

    Didou Bowtie extraordinair! Posts: 4,274

    Another thing to consider (& the Asus website isn't very clear) is if that motherboard supports the 133mhz FSB version of that CPU. I think the i815 chipset supported such an FSB in general but you never know.
  11. PieterDV

    PieterDV TS Rookie

    Which CPU do I need EXACTLY ?


    As I am also an ASUS P3B-F owner, I am monitoring this forum. Currently I am running this board with a PIII 500 Mhz. I also want to update this board to the maximum possible CPU speed. As I am technical but not a PC-specialist I would like to have your 'expert' advise.

    So I have checked the bios >> currently 1006 : I have to update this to 1008.004 ; no problem for me

    I have checked the revision of this board ; it is 1.04

    So normally it must be possible to install such an 1 Ghz CPU. My questions are :

    Is this CPU still available on the market ? Prduct nr ? Website?

    If I can find such a slot 1 1Ghz CPU ; which other parameters should I verify before I buy it ?

    It should be also possible to work with an adapter board to 370 and to install another type of CPU. What are the (dis)advantages ? Limitations ?

    Can maybe somebody help me with partnumbers ?

    Please Mr. 'Justaguy' let me know if you were succesfull with this upgrade.

    Many thanks to you all !!

  12. JustAGuy

    JustAGuy TS Rookie Topic Starter


    I have upgraded successfully to a PIII 1Ghz chip. It runs fine though I had a friend fool with the jumpers so the board would recognize it correctly. I ran a quick search on Google and it looks like there are still a few out there, however... The disadvantage to this motherboard is the memory more than the chip. I was looking to upgrade the memory and it looks like I can only go up to 768 MB of SDRAM because the board won't recognize anything bigger than a 256 SDRAM dimm. So I'd recommend looking for a good mobo/pc chip combo if you could. I do notice a slight improvement in speed with the 1Ghz chip, but I could use the memory more. Hope that helps some.
  13. darkfar

    darkfar TS Rookie

    Hi, I have a question, How you set your MOBO to work properly with P3 1GHz Slot 1 ?
    I have the same MOBO and the 1Ghz P3 Slot 1 1,75V.
  14. PieterDV

    PieterDV TS Rookie


    Many thanks for your advise. I have bought from www.abgcomputers.nl an upgrade with an Intel Celeron 1300Mhz Tualatin CPU. My motherboard is an asus P3B-F 1.04 with bios 1008.004. My PC (previous PIII 500 Mhz) starts now with the message PII 1200 MHZ. When I verify with windows booted it is a PIII 1300 Mhz. How can I correct the message in my bios ?

    Many thanks for your help !

Topic Status:
Not open for further replies.

Similar Topics

Add your comment to this article

You need to be a member to leave a comment. Join thousands of tech enthusiasts and participate.
TechSpot Account You may also...