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Intel E7400 - Page 3

post #21 of 41
Mobo chipset quality will come into play.
I hate my mobo.. i have an E0 stepping e8400 and it takes me 1.3625V to get to 4Ghz 24/7 stable

Better mobos will handle the voltage thing and bump up fsb more effectively.



Is your RAM running above it's stock speed?


I read in another thread 2 days ago- some kid could only get 4.1ghz on his 680i but when he got the 780i he was able to reach 4.4ghz.



Personally I just don't think it's worth it to spend so much on a high-end mobo just to get that extra 0.2 - 0.3Ghz in. Of course if you have money and want to enlarge your e-weiner, going for every extra digit possible, go for it.


But hey, 4ghz for that CPU is really good. My e8400 can only get to 4ghz while staying within the voltage safe limit. You should feel good about getting over a 50% overclock.
Edited by xwinx - 12/27/08 at 8:30pm
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xwinX2
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post #22 of 41
Thread Starter 


That's me. As I see the mobo must be the problem. For 4GHz i need 1.45v in BIOS. The weird thing is that my RAM is underclocked, it's stock is 1066MHz, but my PC doesn't complete POST anything pass 800MHz. Isn' that weird?
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post #23 of 41
I think the others are correct, your processor just tops out at 4.0. You should feel lucky you've made it that far with such low voltage. I have the E7300 and can boot into windows at 4ghz, but decided it was too much voltage for really no performance gain and possible stability issues, so I stick with 3.9 ghz with rock solid stability @ 1.35Vcore. 50% overclock on a $100 processor is not a bad deal, FYI.
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post #24 of 41
I have gotten much farther with my E7400 on air/water and DICE.. for air cooling though, your going to max out for stable speeds around 4-4.2ghz.. water got me to 4.45..and DICE has me around 4.6ghz so far..but still tweaking.

As for your mobo.. I run over 430mhz on a few P5K-vanilla's.. your mobo is just fine with higher FSB to say the least. Your stability lies in the NBv and FSBv.. along with mem divider and timings.

Leave your mem timings on Auto for now.. increase the NBv and FSBv a notch and try to boot past 400mhz. The mobo is capable of much more..trust me.
post #25 of 41
Thread Starter 
Yeah, about P5KC, I just traded it for P5Q PRO from my friend. Now I'm runing 4GHz @ 1.3675v in BIOS (that was 1.45v on P5KC to run it). So that's a huge change. I'll try to get it to 4.2GHz
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post #26 of 41
Thread Starter 
Anyhow, I was just reading the overclocking guide at this site and I'm just wondering about that northbridge. What's the stock voltage for P5Q PRO and how much can I push it? And yes, did anyone tried that multiplayer playing? Is it working?
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post #27 of 41
Thread Starter 
Bump.
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post #28 of 41
Thread Starter 
Come on people, please help me a bit!
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post #29 of 41
I think stock MCHv is 1.3v for the P45... You dont want to go much past 1.5v with good aircooling on the NB... just raise the MCH Refv to x.63% for a little more headroom.
post #30 of 41
Do you have load line calibration enabled? That will help your vdroop.
I thought 1.7v was ok voltage for the p45 with good cooling, guys used to say that was fine for the p35. I ran my p35 @ 1.7v on it for 6months and it still runs with no problems.
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