Optiplex 755 CPU Upgrade

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Optiplex 755 CPU Upgrade

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I've been researching this for over a week & my brain is mush.

My current 755 setup is

Intel Core 2 Duo E6400

2GB Memory

Radeon HD 4650

160GB - Windows XP SP3/All current drivers & updates

1TB SATA

2TB SATA

BIOS - A22

I've been looking to see the fastest processor this motherboard ( OGM819 w/Q35 chipset).  I've found a ton of info but no definitve answer.  I believe that an E8400 is the fastest & in my price ranges.  So 1A. Is this the fastest CPU I can upgrade too?  1B. Will the stock heatsink & power supply do or will they need upgrading also?  If so what power supply will I need?  To add to this I found a thread somewhere that stated I could upgrade to a 64 bit CPU, is this correct & what would you recommend?

2. Memory - the software I downloaded from Dell - 'My Dell' states that I can upgrade to 8GB but looking further my current setup, 32 bit will only see 4 GB, correct? So the only way to upgrade to 8GB is via a 64 bit CPU, correct again?

Why am I doing this.  I'm ripping my blue-ray collection to this pc which is now my HTPC.  3TB looks huge but not when you rip uncompressed iso.  What I'm running into is that I'm compressing some of this isos to BD25 to save space but the process is taking up to 11 hours with the current setup.  Any & all suggestion are extremely welcomed.  While my 755 just sits there I want to speed up the process as much as I can.

Thank you all in advance.

Thom

Verified Answer
  • Hi Thom,

    You may install E8400 and the currently installed heatsink and power supply should suffice. However, Dell has not tested this processor on this system.

    Hope this helps. Please reply if you have any questions.

    Thanks & Regards
    Saharsh K
    #iworkfordell
    To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USA; India. For helpful Dell Support Videos, you may click Here.
All Replies
  • injera

    http://en.community.dell.com/support-forums/desktop/f/3514/p/19276940/19960807.aspx#19960807

    With a 64-bit operating system, 8gb [4 x 2gb modules] is supported.

    Bev.

     

    If my answer was helpful, please use the 'Did this answer the question' and click: Yes
    Forum Member since 2001
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  • Hi Thom,

    The OptiPlex 755 supports the Intel Core 2 Quad, Intel Core2 Duo, Intel Pentium dual-core, Intel Celeron processors based on Intel's 775-pin (LGA775) socket. You may check the list of Dell tested processors from the link shared by .

    Theoretically speaking, you should be able to install Intel Core 2 Duo Processor E8400 (6M Cache, 3.00 GHz, 1333 MHz FSB) on this system and it should function properly. However, Dell has not tested this processor on this system. For your reference you may also want to check the comparison between the one installed and Intel Core 2 Duo Processor E8400. Here is the link http://dell.to/18UuBpT.

    Note: Dell does not recommend or offer processor upgrade but it is as your discretion in case you really wish to go  ahead with it. Warranty per say, issues arising due to the upgrade will not be covered under warranty , however we will continue providing support for other issues and parts.

    Please refer to the User's Guide for instructions on replacing the hardware components. Please follow the safety guide lines.

    Please reply if you have any questions. I'll be happy to assist further.

    Thanks & Regards
    Saharsh K
    #iworkfordell
    To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USA; India. For helpful Dell Support Videos, you may click Here.
  • After updating to the latest bios I would say up to 45nm Q9650 for the Mini Tower.

    You would have to make sure that you get PC6400 DDR2 Ram if you do that.

    UPDATE THE BIOS BEFORE trying to install a newer processor.

    10/26/2011 2:11 AM 2239507 O755-A20.exe

    The Dell spec for the desktop version lists the
    Q6600, Q9450, and Q9550 CPUs.

    http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

    The Q9650 worked in my minitower bios A20.

    Report Unresolved Customer Service Issues here:

    Dell - Unresolved Customer Service Issues

    I do not work for Dell. I too am a user.

    The forum is primarily user to user, with Dell employees moderating.

  • Bev, 

    Thanks for verifing.  If dell was just as clear.  I was getting confused by the manuals and what their software was saying.

    Thom

  • Sahash,

    Thank you for the info.  Things are getting clearing on doing this upgrade.

    I have an additional question. Between a E8400 & an E6850 which would you recommend.  The spec & price are almost the same except the E8400 has a bigger cache.  Also will I need to upgrade my heatsink & power supply also?  What would you recommend?

    Thanks in advance.

    Thom

  • Hi Thom,

    You may install E8400 and the currently installed heatsink and power supply should suffice. However, Dell has not tested this processor on this system.

    Hope this helps. Please reply if you have any questions.

    Thanks & Regards
    Saharsh K
    #iworkfordell
    To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USA; India. For helpful Dell Support Videos, you may click Here.
  • Intel® Core™2 Duo Processor E8400 (6M Cache, 3.00 GHz, 1333 MHz FSB) might require PC2 8500 Ram.Surprise

    Report Unresolved Customer Service Issues here:

    Dell - Unresolved Customer Service Issues

    I do not work for Dell. I too am a user.

    The forum is primarily user to user, with Dell employees moderating.