P5N32 SLI SE DELUXE VDROOP issue

P5N32 SLI SE DELUXE VDROOP issue

Ok so im not entirely sure if this should go in this thread or some power supply thread but im posting here anyway.

i have this problem and i belive its power related, but first let me give you the core specs.
Items marked with * are OCed
Items marked with ** is where i think the problem begins.


MB:P5N32 SLI SE DELUXE latest BIOS 601
CPU:Pentium D805 @3.9GHz-4.0GHz*
RAM:cosair 6400C4 4 4 4 12 5 2 @2.10volts
Video card: Had a evga 7950GT, stepped up to a 8800GTX**
PSU:Thermaltake 650 watt toughpower PSU 52A combined output**

ok so ill begin to describe the issue, with the original card i used to have the sit the proc at about 1.5250 volts not it seemed if i went to the bios HW monitor it only read about 1.50 volts. ok that seems somewhat normal, but the 7950GT if i put full load on the proc and i was in windows using the asus softwear monitor it would go from around 1.49-1.50 To about 1.46 but i seemed to maintain stable operation and my games didnt crash.

so i step up and now when the 8800GTX in i can sit around 1.49 idel, but then if i put the proc at full load it drops to around 1.41 a larger decrease in voltage and my games will crash however windows continues to run., and my throttle doesnt engage however Rightmark CPU sees the clock speed drop. and its not heat. in anycase im thinking about selling my board to a friend for 190$ and upgrading, i was thinking about going with a EVGA 680I. or maybe one of the ASUS 680i chipsets can anyone tell me if im going to have the same problem and that its my psupply or that its a problem with asus mobos. i belive someone said vdroop is bad wtih this board.


please ask me questions if you need to. educate me, i need to know where my issue lies. also im aware that the 8800GTX is overkill for my cpu but i plan on upgrading later, anyway the 805 d was only 99$ so i do not feel like im losing alot by upgrading and i can sell the board and be ready to upgrade my CPU early next year. but untill then i need to get this power situation solved. do i need more stable power? or is it the board?
5 answers Last reply
More about p5n32 deluxe vdroop issue
  1. Which drivers are you running? I don't think it is the CPU that is causing the issue, when a CPU crashes because of not enough voltage you usually get a BSOD and a complete freeze.

    It very well may still be the PSU not being able to power your 8800GTX when it is at load. Very possible that this is the reason.

    In windows voltage monitors are not to be relied upon too heavily.

    Is there a higher wattage PSU available for you to try? Or are you comfortable chaining a second PSU to run the 8800?

    Try putting the CPU back to stock and unplugging anything unneccesary for normal operation. Run a few games and maybe loop 3dmark0x and see if it crashes. If so, I assume a driver issue and suggest unintalling and running driver cleaner and reinstalling. If it doesn't crash, overclock the CPU again and try it. If it then crashes, I assume a PSU issue.
  2. Quote:
    Which drivers are you running? I don't think it is the CPU that is causing the issue, when a CPU crashes because of not enough voltage you usually get a BSOD and a complete freeze.

    It very well may still be the PSU not being able to power your 8800GTX when it is at load. Very possible that this is the reason.

    In windows voltage monitors are not to be relied upon too heavily.

    Is there a higher wattage PSU available for you to try? Or are you comfortable chaining a second PSU to run the 8800?

    Try putting the CPU back to stock and unplugging anything unneccesary for normal operation. Run a few games and maybe loop 3dmark0x and see if it crashes. If so, I assume a driver issue and suggest unintalling and running driver cleaner and reinstalling. If it doesn't crash, overclock the CPU again and try it. If it then crashes, I assume a PSU issue.



    thinking about it i belive your right im not getting enough voltage to my GPU, largely due probably to my OC on my CPU drawing so much power, and ive been told the Voltage monitor is not to be relied upon but since its showing a droop greater than before the 8800GTX i belive its safe to bet that im not providing enough power to my hardware.

    i would not have a problem chaing another psu except all my old psus are legacy atx, wait i could use the molex to 6 pin adaptor! theres one more problem though, how do i get the psupply to turn on without it being plugged into a mobo? a second one? or should i go with one of those supplemental 5.25 inch psupply bays? i could just buy one i guess?

    but you agree that if i upgrade to a knew mobo in two weeks, probably same problem?
  3. Flash the BIOS asus forums says the bios undervolts and does not give a true reading.
  4. Quote:
    Flash the BIOS asus forums says the bios undervolts and does not give a true reading.



    i have the 603 bios for this board, which is the latest on their website. with which bios do you speak of? also im almost positive now its a power issue, when i lower the clock speed BF2142 actually loads now. but even at 4.0GHZ i know my card is bottlenecked by the CPU so im just going to sell and upgrade hardware over the next month.

    so with which motherboard should i go? EVGA 680i or wait for my local ETAILER OR RETAILER to get an asus 680i chipset?

    oh and im just gonna go after a 1000 or 1200 watt PSU so i never have to think about power ever again.
  5. ok so last night i got a 400 watt power supply out of an older ATX computer. and it says it provides 144 watts on the 12v rail at 14A so i useed the molex to 6pin connectors and connected them to the 4 different molex rails on the external PSU if that makes a difference im not sure you can see here

    when you go to look at the pictures theres a zoom button at the bottom of the pic to see it in full res.

    http://thumb12.webshots.net/t/59/659/8/32/52/2648832520099896852aSxIQd_th.jpg
    http://thumb12.webshots.net/t/53/553/8/83/5/2214883050099896852oehnyP_th.jpg
    http://thumb12.webshots.net/t/16/16/9/8/46/2751908460099896852SHhwlT_th.jpg

    in any case this did seem to help the situation below you will find two screens of my CPU to be at what i belive to be full load and no load.

    http://thumb12.webshots.net/t/61/161/5/79/59/2460579590099896852HnIHFD_th.jpg
    http://thumb12.webshots.net/t/56/156/2/30/21/2219230210099896852zJmccq_th.jpg


    when you go to look at the pictures theres a zoom button at the bottom of the pic to see it in full res.

    So basically you will notice no drops in core speed or throttling(purple) which was happening like crazy before i jumpered an external psu and using that to provide power to the GPU, however at 4.0GHZ i am unable to get through the CPU test in 3D mark where i used to be able to with the old card. so i clocked it down to 3.9 GHZ and this is what i was able to get thru the defaul benchmark in 3dmark

    System and CPU Information
    Operating System Microsoft Windows XP
    DirectX Version 9.0c
    Mobo Manufacturer ASUSTeK Computer INC.
    Mobo Model P5N32-SLI-SE-Deluxe
    ASUS P5N32-SLI SE Deluxe AI Lifestyle Gaming Edition - motherboard - ATX - nForce4 SLI X16

    AGP Rates (Current/Available) 16x / N/A
    CPU Name Intel Pentium D 3900 MHz
    CPU String Intel(R) Pentium(R) D CPU 2.66GHz
    Intel Pentium D 805 / 2.66 GHz processor

    Physical / Logical CPUs 1 / 2
    MultiCore 2 Processor Cores
    HyperThreading N/A
    FSB 133 MHz
    Memory 2048 MB

    Display Information
    Graphics Chipset NVIDIA GeForce 8800 GTX

    Graphics Card Vendor
    Driver Name NVIDIA GeForce 8800 GTX
    Driver Version 9.6.8.9
    Driver Status Non WHQL - Not FM Approved
    Co-operative adapters No
    Video Memory 1024 MB
    Core Clock 108 MHz
    Memory Clock 337 MHz

    Benchmark Settings
    Default Settings Yes
    Program Version 3DMark06 Revision 1 Build 0
    Resolution 1280x1024
    Anti-Aliasing None
    Texture Filtering Optimal
    Vertex Shader Profile 3_0
    Pixel Shader Profile 3_0
    Force Full Precision No
    Disable Post-processing No
    Force Software Vertex Shaders No
    Force Software FP Filtering No
    Disable HW Shadow Mapping No
    Color Mipmaps No
    Repeat Count Off
    Fixed Framerate Off

    Main Test Results
    3DMark Score 8350 3DMarks
    SM 2.0 Score 3570 Marks
    SM 3.0 Score 4144 Marks
    CPU Score 1898 Marks

    Detailed Test Results

    Graphics Tests
    1 - Return to Proxycon 30.094 FPS
    2 - Firefly Forest 29.402 FPS

    CPU Tests
    CPU1 - Red Valley 0.61 FPS
    CPU2 - Red Valley 0.946 FPS

    HDR Tests
    1 - Canyon Flight (SM 3.0) 44.755 FPS
    2 - Deep Freeze (SM 3.0) 38.116 FPS
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