Optiplex 745 3.2 P4 cpu

Hello,
I have a optiplex 745 with a 3.2 P4 - 800fsb. I want to upgrade.......I looked on here and thought I found that I could use a E6700 - 1066fsb 3.2 dual core but, it would boot, I tried a E5400 2.7 dual - 800fsb and still won't boot, all they do is put the case fan at full speed, I pulled the cmos battery thinking it would reset, and the same....
Any Ideas (other that scraping my company pc)?
Thanks for any input
15 answers Last reply
More about optiplex
  1. The E5400 is a 45nm CPU. You are limited to the 65nm CPUs such as E4500, E6600, Q6600. The E5400 CAN'T work on that system.
  2. I've put a Q6600 in a spare Optiplex 745 I have and it works great. Good upgrade if you can get one.
  3. Quote:
    show me..


    I'm confused. Show you what? That a Q6600 works in a Optiplex 745? Unfortunately my parents in-law have the computer now but I assure you that it does work. It's a 65nm CPU which the Optiplex 745 motherboard supports.
  4. Well, I apologize since I don't have the computer anymore but here's a thread from Dell about a person who did the same thing:
    http://en.community.dell.com/support-forums/desktop/f/3514/p/19252724/19411531.aspx

    And another thread:
    http://forums.pcper.com/showthread.php?t=463905

    And another:
    http://en.community.dell.com/what-do-i-buy/f/3510/t/18666624.aspx

    Are you saying it won't work? It was a G0 stepping if that matters and I believe BIOS version 2.4.1 which I think is not the latest.
  5. Quote:
    prove it with detailed links that it can run the quad with bios update..
    and after you realize the truth, I'll explain in detail...


    What was all that about "realize the truth"? It's cool ;)
  6. Quote:
    true.
    I should have rephrased it.
    Try this:
    do you know the BIOS update in particular that allowed the Optiplex to run a wider variety of chips and,
    what exactly did the BIOS update change to allow such an improvement.?
    how's that.? :whistle:

    Thanks.
    Ahh, ok. That makes sense. I think I do remember reading about one of the BIOS updates (2.3.1?) expanding support for more CPUs. Thanks.
  7. Quote:
    it can but it's not overly known..


    Really? That's interesting. Please share!
  8. Quote:
    it can but it's not overly known..

    From what I can tell, that Dell uses the old Q965 chipset (see: http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf ). AFAIK, that chip set do not support 45nm CPUs.

    See: http://www.intel.com/products/desktop/chipsets/q965-q963/q965-q963-overview.htm
    Notice that the FSB supported is maxed out at 1066. Which would mean that 45nm CPUs are probably not supported.
    And : http://bit.ly/cipUic
    And finally, the CPU support page do not list any 45nm CPU as being supported (look under COMPATIBLE PRODUCTS > Compatible CPUs): http://ark.intel.com/chipset.aspx?familyID=22756
    It also do not list C2Q support, even the 65nm varient. So you may not be able to run a c2Q on this chipset.


    Unless you can show me a CPUZ validated link, I'm gonna say that 45nm CPUs won't work on that board/chipset. 65nm C2Qs may or may not work.
  9. OK, updated the bios yesterday, with 2.6.4 - 3/16/2010, I think it had 2.4.x from 6/2006. I installed the e6700, no dice. I pulled the batttery, no dice. So I guess I could buy a Q6600 on ebay but, errrr to risky.
    Thanks for all the input, you have all bee very helpful.

    On another note would flashing the bios to a dell with the 65nm work?
    I won't do that to this one, my boss would not be happy if it died.
  10. I meant "On another note would flashing the bios to a dell with the 45nm work?"
  11. Bugwhat said:
    OK, updated the bios yesterday, with 2.6.4 - 3/16/2010, I think it had 2.4.x from 6/2006. I installed the e6700, no dice. I pulled the batttery, no dice. So I guess I could buy a Q6600 on ebay but, errrr to risky.
    Thanks for all the input, you have all bee very helpful.

    On another note would flashing the bios to a dell with the 65nm work?
    I won't do that to this one, my boss would not be happy if it died.

    Looks like Dell uses some locked BIOS to limit CPU models. Sorry, looks like you are SOL. A Q6600 WILL NOT work with that chipset. (See my above post).

    The E6700 should have worked, but by the looks of it, either the CPU is dead or Dell has a locked BIOS that limits it to certain CPU models.
  12. Yes indeed some branded will locked the BIOS that limits upgrading not just the CPU.
  13. Well the e6700 works on a newer MOBO, so I know it's good. Is there anyway to unlock the bios?
    Or use one for a similar machine?
  14. ^ Probably not. You can contact Dell and see what they say.
  15. fellskrazykayaker said:
    Well, I apologize since I don't have the computer anymore but here's a thread from Dell about a person who did the same thing:
    http://en.community.dell.com/support-forums/desktop/f/3514/p/19252724/19411531.aspx

    And another thread:
    http://forums.pcper.com/showthread.php?t=463905

    And another:
    http://en.community.dell.com/what-do-i-buy/f/3510/t/18666624.aspx

    Are you saying it won't work? It was a G0 stepping if that matters and I believe BIOS version 2.4.1 which I think is not the latest.


    I'm running this system with Core2 Quad Q6600 G0 (SLACR) with BIOS version 2.4.1 and 2.6.2 for four years.

    [cpp]Processors Information
    ------------------------------------------------------------------------------------

    Processor 1 (ID = 0)
    Number of cores 4
    Number of threads 4 (max 4)
    Name Intel Core 2 Extreme Q6600
    Codename Kentsfield
    Specification Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
    Package
    CPUID 6.F.B
    Extended CPUID 6.F
    Core Stepping G0
    Technology 65 nm
    Core Speed 2392.3 MHz
    Stock frequency 2400 MHz
    Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T
    L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
    L1 Instruction cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
    L2 cache 2 x 4096 KBytes, 16-way set associative, 64-byte line size
    FID/VID Control yes
    Features XD, VT[/cpp]
    [cpp]DMI
    ------------------------------------------------------------------------------

    DMI BIOS
    --------
    vendor Dell Inc.
    version 2.6.2
    date 08/12/2008


    DMI System Information
    ----------------------
    manufacturer Dell Inc.
    product OptiPlex 745
    version unknown
    serial xxxxxxxx
    UUID xxxxxxxx[/cpp]
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