OC prob 200mhz increase = unstable

i overclocked my pc lastnight not by much only 200mhz and windows was now unstable randomly restarting, longest it was on for was 5min.

i havent got a heat issue as the cpu was only up by 1-2c for a total of 37c ish.

other temps:

cpu 37c
heat sink 27.5c
case 21c
hdd 38c
psu 30.5

i put my DRAM Frequncy upto 215 which = 3001mhz

Spec.

p4 2.8e
2x 256mb pc3200 ddr400 twinmos (2.5, 6, 3, 3)
asus p4s800d
ati 9800pro 128mb 256bit
creative audigy 2 platinum
hyper 6 cooling


infomation from cpuz

core speed: 2800.9
multiplier: 14
fsb: 200.1
bus speed: 800.3
voltage: 1.432

If u do things right.... People won't be sure you've done anything at all......
19 answers Last reply
More about prob 200mhz increase unstable
  1. loosen your RAM timings / increase the voltage to the RAM / CPU

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  2. Ditto, try 2.5,3,3,7 for timings. Your timings look wierd for a P4 platform.

    Abit IS7 - 2.8C @ 3.4 - Mushkin PC4000 (2 X 512) - Sapphire 9800Pro - TT 420 watt Pure Power
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  3. ok will lower ram timings, about the ram voltage i dont know what to set it to, at the moment its set to auto. i dont think i can change my cpu voltage as the option is blacked out and it skips past it when i go to highlight it (configure system frequency/voltage) is this the right option?

    If u do things right.... People won't be sure you've done anything at all......
  4. up it to 2.7. If you need even more, you can do 2.8 "safely".


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  5. right, didnt have 2.7 or 2.8 option so only had incremeants of 10 but ofset by 5, so i set it to 2.75

    ran ok for about 3min, heres the info i got

    Field Value
    CPU Properties
    CPU Type Intel Pentium 4E
    CPU Alias Prescott
    CPU Stepping C0
    Engineering Sample No
    CPUID CPU Name Intel(R) Pentium(R) 4 CPU 2.80GHz
    CPUID Revision 0F33h

    CPU Speed
    CPU Clock 3014.71 MHz (original: 2800 MHz, overclock: 8%)
    CPU Multiplier 14.0x
    CPU FSB 215.34 MHz (original: 200 MHz, overclock: 8%)

    CPU Cache
    L1 Trace Cache 12K Instructions
    L1 Data Cache 16 KB
    L2 Cache 1 MB (On-Die, ATC, Full-Speed)

    Motherboard Properties
    Motherboard ID 63-0603-009999-00101111-052604-SIS655FX$100XX001
    Motherboard Name Asus P4S800D (5 PCI, 1 AGP, 1 WiFi, 4 DIMM, LAN)

    Chipset Properties
    Motherboard Chipset SiS 655FX
    CAS Latency (CL) 2.5T
    RAS Active Time (tRAS) 6T

    BIOS Properties
    System BIOS Date 05/26/04
    Video BIOS Date 04/01/21
    DMI BIOS Version 1006.003

    Graphics Processor Properties
    DirectX 4.09.00.0902 (DirectX 9.0b)
    Video Adapter ATI Radeon 9800 Pro (R350)
    GPU Code Name R350 (AGP 1002 / 4E48, Rev 00)
    GPU Clock 378 MHz
    Memory Clock 338 MHz

    Sensor Properties
    Tsystem 29 °C (84 °F)
    Tcpu 38 °C (100 °F)
    Fcpu 2377 RPM
    Vcore 2.21 V
    Vaux 3.10 V
    Vio 3.20 V


    If u do things right.... People won't be sure you've done anything at all......
  6. what have you loosened your timings to?

    <font color=blue><font color=red>Blow</font color=red> Dry <font color=red>my ass</font color=red> and call me <font color=red>Eden</font color=red>!</font color=blue>
  7. i put them to auto and by spd, what should i set them to?

    If u do things right.... People won't be sure you've done anything at all...... <P ID="edit"><FONT SIZE=-1><EM>Edited by evulboo on 07/30/04 09:38 PM.</EM></FONT></P>
  8. Look at my previous post. Just don't expect much out of a CO Scottie. They are definitely not the clockers the DO stepping CPU's are.

    Abit IS7 - 2.8C @ 3.4 - Mushkin PC4000 (2 X 512) - Sapphire 9800Pro - TT 420 watt Pure Power
    Samsung 120gb ATA-100 - Maxtor 40gb ATA - 100
    Sony DRU-510A - THAT'S MORE LIKE IT!
  9. yep, increase the core voltage. But chances are that chip dont want to o/c.

    Unlucky

    _______________
    STFU
  10. C0 Prescott will still overclock to the 3.7-3.8Ghz range, if you cool it enough.

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  11. just tried 2.5 3 3 7 @ 3ghz crashed while loading, had ram voltage @ 2.75

    as for vcore i dont have that in my bios so dont think i can change it

    any ideas what i should try?

    If u do things right.... People won't be sure you've done anything at all......
  12. i cant see why a 200mhz increase is making my system unstable heat @ 3ghz is not going over 40c idle

    If u do things right.... People won't be sure you've done anything at all......
  13. just found this out bout my mobo:

    Vcore can be only increased by 0.1V above the nominal value – this may be enough just for ordinary (non-extreme) overclocking as Pentium 4 processors are not very sensitive to the voltage they receive

    Thanks to the SiS655FX chipset, the frequencies of the AGP and PCI buses are locked at their normal values, 66/33MHz.

    Our overclocking attempts with the ASUS P4S800D were a bit of a disappointment. The Pentium 4 2.4C processor that we used with this mainboard can speed up to 3.6GHz at 300MHz FSB, but we couldn’t repeat this result on the ASUS mainboard even reducing the memory clock rate to the minimum. It’s hard to tell certainly what was the reason, but the mainboard would lose stability at 255MHz FSB. Moreover, from 240MHz FSB on, you have to use specific memory modules as the system wouldn’t start up with some modules, irrespective of the FSB/MEM divisor, timings and the rated frequency of the modules.

    So ASUS P4S800D mainboard can only be used for moderate overclocking. The basic disadvantage of this mainboard is its limited abilities in controlling the Vcore and low stability at the FSB frequency over 240-250MHz


    going to go try it see if the 0.1 helps

    If u do things right.... People won't be sure you've done anything at all...... <P ID="edit"><FONT SIZE=-1><EM>Edited by evulboo on 07/31/04 10:24 PM.</EM></FONT></P>
  14. lol well its offical.... my mobo sucks ass :p ive had no luck what so ever

    If u do things right.... People won't be sure you've done anything at all......
  15. It's probably your memory. It's only rated at PC3200. Some PC3700 should get you to 3.2ghz without over-volting your CPU. See if you can borrow some faster sticks to try.

    Abit IS7 - 2.8C @ 3.4 - Mushkin PC4000 (2 X 512) - Sapphire 9800Pro - TT 420 watt Pure Power
    Samsung 120gb ATA-100 - Maxtor 40gb ATA - 100
    Sony DRU-510A - THAT'S MORE LIKE IT!
  16. Your motherboard sux because VIA and Asus have an agreement to make it suck, SiS being VIA's main competitor. You'll notice that chipset issues aren't such a big deal, but the limitted vCore was purposely implemented to hold you back.

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  17. You can volt mod the board. Head over to extremeoverclocking forums, they could help you out on that, just take a photo of your motherboard, and they should be able to help u out.

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  18. i dont think im brave enough to do that :s so im thinking that i should get a new mobo at some point, which brings me to this question.

    when a 64bit p4 mobo comes out will it be backward compatible with my 2.8e or will they use a different socket? if they are not i will wait till mid-year next year and buy a new system.

    If u do things right.... People won't be sure you've done anything at all......
  19. Most likely it's gonna be on 775.

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