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Thread: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.




  1. #1
    rockas7 is offline Junior Member
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    Default p4vm900-sata2 -- slows way down with faster Prescott p4 installed

    Thanks in advance for any assistance.

    Does a p4 Prescott need specific settings in the BIOS to run properly on this board?

    Asrock 94vm900-sata2 board with 2gb ram, default BIOS settings, with a 2.2ghz P4 processor. Installed a 3.0ghz p4 Prescott (with hyperthreading, the 2.2 didn't have that), and it ran extremely slow, close to unusable. Swapped back to the 2.2 back, everything is back to normal.

    Cant figure out why everything slowed to a crawl...any suggestions? Checked the CPU compatibility chart from the ASROCK website, said the faster Prescott would work.
    Last edited by rockas7; 05-09-2013 at 08:42 AM. Reason: brevity

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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Wow, a relatively antique processor (in CPU years, shorter than dog years), but reminds me how far we've come in nine years.

    Which leads me to, there are quite a few variations of a P4 Prescott, but hopefully that won't make much difference.

    First, did you clear the CMOS/BIOS after installing the new CPU?

    Your previous CPU's FSB speed is 400MHz, the new one 800MHz, I think. You should check what the FSB speed is set to in the BIOS, and set it to 800MHz manually.

    Reviews I've read about the P4 Prescott seem to indicate that there are multiple FSB versions of the P4 Prescott, some with a FSB speed of 533MHz, so impossible for us to know what specific version you have. I did read someone experienced the same thing performance-wise as you did, but they may not have had it configured correctly.

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    rockas7 is offline Junior Member
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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Thanks for the response. 9 year old mobo--yeah gotta work with what i got.

    The newer Prescott that was giving me trouble is an sl7e5, 3.2ghz at 800fsb. Didnt physically clear the CMOS, ill try that. The current chip in the machine is a Northwood 2.4ghz with FSB of 533.

    Checked the BIOS to change the FSB manually, wasn't a specific "Change your FSB HERE" setting, could it be referred to by another name?

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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    I downloaded your mobo user manual from ASRock > P4VM900-SATA2 -- PDF User Manual Download

    Go to section 3.3 Advanced Screen on page 30 where you should click on CPU Configuration.
    In section 3.3.1 you will see:
    CPU Host Frequency ----- [Auto] ------------------------------Select how to set the CPU host frequency.
    Actual Frequency (MHz) -- [133] <-- or a different number

    Ratio Status ----- Unlocked (Max:21, Min:14) <-- these values might be different.
    Ratio Actual Value ---------- 21
    Ratio CMOS Setting ------- [21]

    and near the bottom of the window:
    Hyper Threading Technology -- [Enabled] <-- hopefully

    Let us know the actual settings in this window in your bios.
    Parsec can best advise you with suggested bios settings as he really, really, really likes antique computer systems.
    BTW, I'm one to talk, because I'm using a slightly newer P35 system.
    Our systems are oldies but goodies not oldies but moldies.
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    rockas7 is offline Junior Member
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    Default Re: p4vm900-sata2 -- slows way down with a "faster" Prescott p4 installed.

    Bios settings:: (with the existing Northwood 2.4 @ 533fsb)


    CPU Host Frequency ----- [Auto]
    Actual Frequency (MHz) -- [133]

    Ratio Status ----- Unlocked (Max:18, Min:18
    Ratio Actual Value ---------- 18
    Ratio CMOS Setting ------- [18]

    Hyper Threading Technology -- [Enabled]

    Antique?!? Dang...

  6. #6
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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Found that processor, the PCN helped nail it down:

    ARK | IntelŪ PentiumŪ 4 Processor 540/540J supporting HT Technology (1M Cache, 3.20 GHz, 800 MHz FSB)

    Q2, 2004 vintage, and socket 775 compatible on some models, yours is 478, which has pins and not "lands". The original price is the same or more than I've paid for current high end CPUs, although that price was valid early on. They don't make them like they used to, which is true, pins always seemed more robust to me, but can you imagine a current socket 2011 CPU, with 2,011 pins! Of course it wouldn't need 2,011 pins, since the identical P4 CPU with lands needs 775 contacts, vs 478 for pins. Much easier to pass current through pins than lands.

    This is more of a challenge than I thought, but I think you don't have many settings to worry about. Things have changed, although some terminology is reused but not for quite the same purpose.

    The FSB speed, 800MHz, is the speed of the connection between the CPU and "Northbridge" chip, or MCH, Memory Controller Hub. That looks like it is just automatically set by the CPU, but might need a reset by clearing the CMOS to get the correct value. This board uses a VIA chipset, not Intel so might not have allowed as many BIOS options. Of course, it would be much easier to figure out if we could see the actual values in the BIOS menus. The

    Speaking of BIOS, this board has ONE BIOS version, the original!

    What OS are you using? What speed memory do you have? A bad FSB ratio between the CPU and memory can cause slow downs, but I don't see FSB ratio settings in that BIOS.

    Clear the BIOS and find load default values in the BIOS and try that, you may need to restart for that to be applied. Then see what things are set to in the BIOS. The "Ratio Actual Value" should be 24 with the new CPU (if I'm right.)

    Oh yeah Prof. Jim, I love antique PCs, thinking about these setting may mess me up forever with the current ones!

    rockas7, everything is relative, a single core CPU like yours from 2002 is even more... vintage than the OP's. Thanks for the info from your BIOS, but how the multiplier is "unlocked" but has no range of values makes no sense to me.

  7. #7
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    Thumbs up Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Quote Originally Posted by parsec View Post
    Oh yeah Prof. Jim, I love antique PCs, thinking about these setting may mess me up forever with the current ones!
    Better you than me
    I did notice one thing from the posted bios settings, 18 x 133.33 = 23999.94MHz so I too would expect the Ratio CMOS Setting = 24 to result in the 3200MHz cpu speed with the new cpu.
    It will be fun to see what you can accomplish if we can set CPU Host Frequency to [Manual]
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  8. #8
    rockas7 is offline Junior Member
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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Windows 7 ult. Will swap in the Prescott and monkey with the BIOS settings when my new cooler comes in tomorrow. Thanks.

  9. #9
    rockas7 is offline Junior Member
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    Default Re: p4vm900-sata2 -- slows way down with a "Prescott p4 installed.

    Replacement 3.2 Prescott works AOK, BIOS, automatically bumped itself up to 200mhz to match the new FSB. Thanks everyone for their advice.

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