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    Inspiron 9400/E1705 7900gs - Undervolting/Overclocking/Tweaks

    Discussion in 'Dell' started by sadukar, Jul 24, 2007.

  1. sadukar

    sadukar Notebook Enthusiast

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    Dell Inspiron 9400, Core2 Duo T5500 1.66GHz, 2Gb Ram, 7900gs (Rev0), 100gb HDD 7200rpm


    CPU Torture Test with 2xPrime95 (In-place large FFTs - maximum heat):
    CPU T5500 Stock voltages (0.950v - 1.150v)/both FANs forced to constant slow speed/ - after 30min temp.= 69C
    CPU T5500 Undervolted __.(0.950v - 0.950v)/both FANs forced to constant slow speed/ - after 30min temp.= 51C

    GPU Stress Test with ATITool 0.26:
    7900gs (375/507)(1.0v))/both FANs forced to constant slow speed/ - after 30min temp.= 80C
    7900gs (375/507)( 0.8v))/both FANs forced to constant slow speed/ - after 30min temp.= 69C
    7900gs ( 460/760)( 0.8v))/both FANs forced to constant slow speed/ - after 30min temp.= 76C /FANs High Speed = 68C

    Tweaks:
    NMI: Parity Check/ Memory Parity Error solved by installing video driver v.94.22:
    http://ftp.us.dell.com/video/R153005.EXE

    to be continued...
     
    sadukar, Jul 24, 2007
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  2. Bestial

    Bestial Newbie

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    Hi, mate! How do you undervolt the 7900gs? I'm interested in this topic but I can't find info. Thanks a lot!
     
    Bestial, Aug 5, 2007
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  3. sadukar

    sadukar Notebook Enthusiast

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    edit video bios with NiBiTor, just know that 0.8v can be used only on 2D mode.
     
    sadukar, Aug 5, 2007
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  4. Bestial

    Bestial Newbie

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    Thanks for the info. Yep, i just want 0.8v in order to lower temp in idle. It's very annoying having a so warm notebook on the lap. What is your idle windows temp with 0.8v and fans at slow sleep?
     
    Bestial, Aug 7, 2007
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  5. sadukar

    sadukar Notebook Enthusiast

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    Left laptop for 8h, lid closed, fans never started, CPU-40, GPU-76(Gpu offset +8), Memory-45, Chipset-48, HDD-42. Ambient temperature 22C.
     
    sadukar, Aug 7, 2007
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  6. obey

    obey Newbie

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    what program did u use to Oc and undervolt your notebook?????
    Thnx
     
    obey, Aug 7, 2007
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  7. sadukar

    sadukar Notebook Enthusiast

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    sadukar, Aug 7, 2007
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  8. obey

    obey Newbie

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    obey, Aug 7, 2007
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  9. Bestial

    Bestial Newbie

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    Cool! I think now I understand. So in order to have 0.8v in 2D mode I have to go to Performance Table Entries in nibitor, entry 1, and change the second 64 (=100 dec) value into 50 (=80 dec), isnt it? Just confirm this, please, and i'll flash it.

    Thanks a lot!
     
    Bestial, Aug 10, 2007
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  10. sadukar

    sadukar Notebook Enthusiast

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    yes, but first check your bios version, extract unlocked+memory optimised same version bios from JLMOD.iso file and edit it. after flash u can overclock with AtiTools v0.26

    PS
    u need write edited bios to bootable cd, use UltraISO(open iso, "save boot file" *.bif) + WinImage(open *.bif file write your edited bios to file, save) - with ultraiso load this new boot file(*bif) into iso and save. write image.iso with nero to cd.

    PS
    not
    but Voltage Table
     
    sadukar, Aug 10, 2007
    #10