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Thread: P4C800E-DLX VDroop help

  1. #1
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    Jan 2005
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    P4C800E-DLX VDroop help

    Hello all. I know this is a rather old board but i would like some help if possible.

    I performed the VDroop mod as indicated by the POT mod here http://www.malvescorner.net/p4c800.html (not the fixed resistor method).

    I have the potentiometer set to 28k Ohms and plopped in a 3.4E Prescot processor. I power up and go into the BIOS where the voltage is set to auto (1.375 i think is the default for this processor). The voltage shows in the BIOS as 1.404 and fluctuates up to 1.424 volts. Now thats a rather decent fluctuation given the purpose of the mod. I set the voltage manually to the lowest (which later turns out to be what this processor loads at default) and as expected the voltage is the same.

    I unsolder the potentiometer (just one leg from the actual trimmer) and boot up and the voltage reads about 1.315 volts with a fluctuation up to 1.327 volts, thats only a .01 difference as opposed to a .02 deviance.

    What do I do about this? The additional voltage i am afraid might damage the processor when its not over clocked at all. The main purpose of this mod was to make sure that the voltage would be stable - not drastically highier.

    Any ideas? Is there any way to measure on the board itself the actual reading of the voltage into the processor?
    DFI Lanparty X48 T2r (Swiftech GTZ)
    Intel Q9450 (DD MPC)
    4 x 2GB OCZ DDR2 1000
    ATI Radeon 4870 512mb (EK-4870FC)
    2x 500gb SATAII RAID 0
    2x 200gb SATA RAID 1 (Back ups)
    2x 160gb SATA RAID 1 (Back ups)
    Creative X-fi Fatal1ty (Overglorified software sound in Vista...was great with XP )
    Don't Forget - The early bird catches the worm, but the second mouse gets the cheese.

  2. #2
    Xtreme Member
    Join Date
    Jan 2005
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    Anyone, help?
    DFI Lanparty X48 T2r (Swiftech GTZ)
    Intel Q9450 (DD MPC)
    4 x 2GB OCZ DDR2 1000
    ATI Radeon 4870 512mb (EK-4870FC)
    2x 500gb SATAII RAID 0
    2x 200gb SATA RAID 1 (Back ups)
    2x 160gb SATA RAID 1 (Back ups)
    Creative X-fi Fatal1ty (Overglorified software sound in Vista...was great with XP )
    Don't Forget - The early bird catches the worm, but the second mouse gets the cheese.

  3. #3
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    New Jersey U.S.A.
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    The higher actual voltage than the set voltage is very normal. Just set it lower in the BIOS to compensate.The .02v fluctuationa is also normal. The droop mod should help when the CPU is loaded. You'll see less drop with the mod.
    955 @ 5362 MHz on DD RBX @ 1.58v
    P5WD2-E Vcore mod, Vdim mod.
    8000ul @ 4,3,3,8 1170MHz @ 2.7v
    ATI 1900xtx, modded DDx18 / Modded EXOS II w/ Alphacool 1510
    Zippy 6850P

  4. #4
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    At its lowest setting (default voltage 1.375) without the droop mod is 1.310 volts. With the droop mod its 1.400 volts - all reported in bios.

    im going to try it with my heavy duty OCZ power supply which will eventually test it. My troubleshooting PSU really isnt rated to power at such voltages this processor although it theoretically has enough amps... I hope it fixes it. Currently with the VDroop mod in Windows at Idle voltage is 1.42ish while load is about 1.36 which is still a decent droop. Again, maybe the corrent PSU would help.
    Last edited by snipper_cr; 05-30-2006 at 05:47 PM.
    DFI Lanparty X48 T2r (Swiftech GTZ)
    Intel Q9450 (DD MPC)
    4 x 2GB OCZ DDR2 1000
    ATI Radeon 4870 512mb (EK-4870FC)
    2x 500gb SATAII RAID 0
    2x 200gb SATA RAID 1 (Back ups)
    2x 160gb SATA RAID 1 (Back ups)
    Creative X-fi Fatal1ty (Overglorified software sound in Vista...was great with XP )
    Don't Forget - The early bird catches the worm, but the second mouse gets the cheese.

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