e8400 can't get into windows at 3.9 and above!

I managed to get ORTHOS stable for 7h 50 min at these settings:

CPU Ratio setting: auto
FSB frequency: 425
DRAM frequency: auto

CPU Voltage: 1.3625
CPU PLL: 1.8
FSB termination voltage: auto
DRAM voltage: 2.1
NB voltage: 1.4
SB voltage: auto

Loadline calibration: enabled

I wasn't really too happy about orthos failing, so I cranked the FSB down from 425 to 422, and am re-running orthos as I type right now.

Windows refuses to load at 3.96, 4.08, or 4.18 GHz, but this is with voltages < 1.37V -- I didn't dare bring it up over what I have it at already.

But 1.3625 seems really really high for a 3.8 GHz overclock. What do you guys suggest I do now? BTW, is 1.8v of CPU PLL safe? I never really read much about it.... I just kinda... set it there...
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  1. These are my settings and the highest I've been able to get stable is 3.78. I'm still working on it but I'm starting to think I might have just gotten a bad chip (and you as well)


  2. I might be able to get to 3.89/3.9 if I increased the voltage to 1.4. Is it worth it?

    What will I gain with 3.8 vs 3.9 GHz besides mere aesthetics in GPU-Z and bragging rights?
  3. The jump from 3.8 to 4.0Ghz is minimal. Your SuperPi 1M times decrease's maybe less than a second and gaming performace is negligible. 4Ghz is more for personal satisfaction, even if it is only a boot and bench :).

    I'm comfortable running mine at 1.45v for the 24/7 4.2Ghz (seems a bad chip in my eyes), it's not recommended but to be honest it's my money so i'll do as i wish.
  4. Mine is at 1.4 but without Loadline Calibration and after VDroop it's 1.36 Idle 1.34 Load. I've tried with and without Loadline Calibration and it really doesn't affect stability either way.
  5. closed_deal said:
    4Ghz is more for personal satisfaction, even if it is only a boot and bench :).



    I have a feeling that's what is going on a lot of the time. I consider stable 24hrs of Orthos but I think a lot of others just think that if it boots it's stable.
  6. I wouldn't go past 1.4v with a 45nm processor like yours, they tend to fry and will not work after that. 3.8 GHz is pretty good, why go to 4.0 GHz?
  7. Keep Load Line Calibration on.
  8. So I take it that the general consensus is just to leave it at 3.8 GHz?

    I guess I'll go working on fine-tuning my memory... maybe I can get it at 4/4/4/15... since it's rated at 1066 and I'm only using 425x2=850.
  9. Regarding the vdroop, I found my board P5E to have quite a high vdroop, after google searching a pencil mode for vdroop and with great risk :O to my computer I performed the act and can say that it has worked for me.

    Example : http://www.clunk.org.uk/forums/guides/1334-p5e-maximus-pencil-vdroop-mod.html

    Vdroop was -0.08 now tops -0.02 :D. Again it's what your comfortable with doing.
  10. pcgamer12 said:
    Keep Load Line Calibration on.

    I've read things that say both, some say leave it on some say turn it off and I really haven't found a difference between the two. With it on the system is stable at 1.36 and with it off it is stable at 1.4 (1.36 after droop).
  11. i would be happy at 3.8ghz. 45nms aren't too fond of high voltages. i rather keep my chip with the safe voltage limits.
  12. I'll agree with the keep it at 3.8Ghz comments. I didn't see any core temps under Orthos load. Download Real Temp and post some load temps.
  13. Temps are <50C on load.
  14. Why does the E8400 require higher voltage to get to 3.8G than the E7200? My E7200 runs 3.8G at 1.33v. Are they that different?
  15. 35c Idle and 56c Load with the settings above and my ambient is 28c right now.
  16. 50bmg said:
    Why does the E8400 require higher voltage to get to 3.8G than the E7200? My E7200 runs 3.8G at 1.33v. Are they that different?


    Twice the cache takes more juice.
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