Results 1 to 7 of 7
  1. #1
    Registered
    Join Date
    Jan 2002
    Location
    Australia

    PC133 running at 66Mhz

    I was just wondering if PC133 SD-RAM could run at 66Mhz, and if it can does it run stable?

  2. #2
    Normal Member Foxie3a's Avatar
    Join Date
    Sep 2003
    Location
    Modesto, CA
    No, you can't underclock RAM, just like you cant lower the FSB of a processor.

    but the motherboard might have a CPU:Memory ratio that would allow you to run the RAM at 133, and the processor at 66.

    Welcome To The Forums.
    Dual Xeon E5v1 4.1Ghz/10M/8.0GTs (This is fast, lol)
    Supermicro X9DA7, 32GB ECC/REG
    Radeon 7970 3GB (MSI Lightning version)
    Triple 24" LCDs (NEC Pro IPS)
    Areca 1680ix = RAID5 SSDs(Solid 700mb/s)
    Storage: 14TB of WD-RE in Synology, plus SAS RAID1.
    Corsair AX1200i, Digital PSU with Line Conditioner and massive gauge wires.
    Asus Xonar PCI-E <- Digital -> Denon Receiver -> Floor Standing Speakers

  3. #3
    yes you can. I have run my AXP system at 5X with a 100MHz FSB, and it has a barton 3000+ and mushkin level 2 black pc3500 ram in it.

    and its obvioudly possible with my ES chip.

  4. #4
    Pc133 should have no problems at 66 MHz. But you may have a problem getting all of your memory capacity out of PC133 on a chipset that only supports 66 MHz FSB. But at worst you'll only get half of your memory capacity. It'll still work.
    Not really a repo man.

  5. #5
    Member SimGuy's Avatar
    Join Date
    Jan 2003
    Location
    Ottawa, Ontario
    Yes, PC133 SDRAM modules will run at PC66.

    As RepoMan suggested, if you have a 440BX, 440LX, 430TX/VX, Via MVP3-4, ALI Alladin 5 or below, which can only recognize up to a maximum of 768 MB's of SDRAM (3 DIMM slots), then a high-density memory module will only be 1/2 recognized by your system.

    High density modules (32xblah blah) are double the density of older modules (16xblah blah) and are only 50% recognized by the aforementioned chipsets.

    To run at PC66, the SDRAM will automatically re-configure itself for operation at that speed. PC133 simply means that it will run UP TO a maximum of 133 MHz.
    Merlin - The Primary System:
    AMD Athlon 64 FX-55 @ 3000 MHz :: Asus A8N-SLI Premium :: 1024 MB OCZ 3200 EL Rev.2 :: BFG GeForce 8800 GTX OC
    Lian-Li PC71 :: 36.7 GB WD Raptor :: 300 GB Maxtor DiamondMax 10 :: 21" Dell UltraScan P1110 :: OCZ GameXStream 700W

  6. #6
    Member
    Join Date
    Jan 2004
    Location
    Phoenix
    Originally posted by Foxie3a
    No, you can't underclock RAM, just like you cant lower the FSB of a processor.

    but the motherboard might have a CPU:Memory ratio that would allow you to run the RAM at 133, and the processor at 66.

    Welcome To The Forums.
    seriously, who told you this crap, have you never heard of underclocking?

  7. #7
    dippy_skoodlez's Avatar
    10 Year Badge
    Join Date
    Mar 2003
    Location
    In front of my computer
    Originally posted by Foxie3a
    No, you can't underclock RAM, just like you cant lower the FSB of a processor.

    but the motherboard might have a CPU:Memory ratio that would allow you to run the RAM at 133, and the processor at 66.

    Welcome To The Forums.

    WTF are you talking about? I can run 100fsb on my barton, and Pc133 should run fine at 66.
    Retina Macbook Pro 2.6Ghz, 16GB DDR3, 512GB SSD, GT650m
    i7 5820K @ 3.6ghz, 16gb DDR4, 2x eVGA GTX 670, 850w HALE90, NZXT Switch 810, Water cooled.
    My Heatware

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •