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Intel E8400 - Ultimate OC! - Page 5

post #41 of 72
Excellent discussion, I think both sides proved their points.
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Ragtime.
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post #42 of 72
Hehe , I um typically push the recommended. I think thats obvious.
If your hardware can handle it the sky is the limit. BUT a prepared man never falters.
So knowing what your doing is the absolute key to this.I have run e2180 with 1.7v
I have run this e8400 with 1.5 v (1.45 actual) none of my chips die or degrade.
Its all about your setup and your parameters , go chuckin llc and 1.5 cpu trm and youll have a problem lol
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post #43 of 72
Quote:
Originally Posted by Biatch View Post
Greetings!

I've been overclocking my fantastic E8400 to the limits, but I'll need some help from smarter people.

CPU:


RAM:


My specs:
Asus P5Q Pro
2GB Kingston KVR800MHz DDR2
Enermax 520W Modu82+
Intel Core 2 Duo E8400
Noctua NH-U12P

My temperatures are around 30-40`C in IDLE -mode.
When I'm playing, Crysis (for example), my temperatures are 40-50`C.

My voltages are on auto, except the CPU voltage.
I won't overheat anything or get burned, I just want to make the world's best overclock!

Thanks for everyone!
Good chip but what does it look like under prime?
Here's my average CO @ 3.6ghz (add +5 for temps, TjMax was 95c then)

post #44 of 72
Quote:
Originally Posted by wierdo124 View Post
Never put any voltage on auto.

Don't put your CPU voltage over 1.3625, and you may be able to go farther,
does that apply to non overclocked cpu too? just curious cause my wife refuses to let me overclock hers.....
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post #45 of 72
Quote:
Originally Posted by Squeeker The Cat View Post
does that apply to non overclocked cpu too? just curious cause my wife refuses to let me overclock hers.....
It depensd on the motherboard. Most Asus mobos overvolt regardless if you've overclocked or not.

Its best to set each voltage setting 1 notch above stock, excluding SB voltage
    
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post #46 of 72
Quote:
Originally Posted by Squeeker The Cat View Post
does that apply to non overclocked cpu too? just curious cause my wife refuses to let me overclock hers.....
Tell her "If I can't play with those buttons i won't play with yours anymore either.." That worked for my ex ;-)
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post #47 of 72
There's a lot of garbage in this thread. Lets fix that.

Intel clearly states that the nominal safe operating voltage for all Core 2 45nm processors is 0.8xxx volts to 1.3625 volts. That means if you go above that voltage, there is a possibility that your chip will burn.

Yeah, some have success, but a few too many I have seen on other forums actually lost a couple hundred dollars due to their 45nm chip kicking the bucket completely. Don't believe me? I'm not here to prove a point about it - it has been discussed before. XS and OCF have at least 15 members who can attest to what I say.

Now on with overclocking.
Take a look here: http://i187.photobucket.com/albums/x...ts/bench-1.jpg

The best way to reach these results is with voltage tuning, not raising.

If you have a CPU FSB/ CPU VTT/ CPU sub-voltage that ranges from 1.1 to 1.4 volts, I recommend a setting of 1.2 exactly. On my particular chip, I cannot even boot at 1.3 volts. 1.2 is generally the best for almost all dual core 45nm chips in terms of stability

If you have GTL Vref lane voltage adjustments, you will need to do that too. The simple way of describing how to use this is as follows:
GTL Vref lane voltage is in regards to your data bus stability with noise. changing the voltage changes noise levels. You set this too high or too low, you get instability and lots of errors. You need to set this voltage at the right spot. the best way to do this is to go to a setting that you know is at least 'decently stable'. From there guage how long it takes for P95 to fail. Then raise the GTL voltage by one step and test again. Keep going until you see stability improving - this will keep improving until you notice it starts to go downhill again. find the middle point and set it there or just above. You now have set your FSB as stable as it can be.

From there you start overclocking the CPU more. Set your CPU voltage so that in windows you get a maximum of 1.362 volts. That means you will need to set in excess of 1.38 volts on vanilla boards. I moded my board to eliminate voltage swing and I still set 1.368 volts only to get 1.334 in windows - however my voltage is solid under idle and load which is what I wanted.
In other words - the cpu vcore number in BIOS does not matter one bit. What matters is the voltage that results because of your setting. Use CPUz for a more accurate reading.

My general tip for OCing is as follows:
Set a goal mhz you want to reach - be modest. Now lets say your goal is 4.2 Ghz. that requires a 470 bus speed (1880 QDR FSB). But you only have 4.0 or even 3.8 stable... So we set the FSB to our goal speed, 470mhz, but use a lower multiplier! 470*8 gives you roughly 3.7Ghz. Perfect - now stress test 100% to ensure that this is stable. If it passes then your motherboard, RAM, and NB can handle most of the stress. bump up the multi and test again - if you have problems, you might get away with more voltage in vcore. if not - try using a half-step multiplier.. you might be near your CPU's limit or your motherboard simply can't handle the speed/power that your CPU wants... from there its on you to gauge whats happening since I don't know much about how to determine such a thing (ive always used enthusiast boards)

Also when stress testing - if you use an x64 operating system - use an x64 stress tester - P95 has a 64bit version, use that instead or else you could ring up false positives on stability and end up BSODing when doing something simple like 64bit internet explorer
Edited by XFreeRollerX - 12/12/08 at 11:58am
    
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post #48 of 72
This thread made it perfectly clear whos "for sale" threads NOT to look at...

It's all good to PUMP up the voltage because you don't care but make sure when you try and sell your chips that you remind others that you didn't care and it may not last long for potential purchasers...

Just my
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post #49 of 72
i sold my E8400 after putting 1.6v through it and its still overclocks like a dream. hell i put 1.67 through my 8600 and its perfectly fine.
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post #50 of 72
Quote:
Originally Posted by wannabe_OC View Post
This thread made it perfectly clear whos "for sale" threads NOT to look at...

It's all good to PUMP up the voltage because you don't care but make sure when you try and sell your chips that you remind others that you didn't care and it may not last long for potential purchasers...

Just my
When i bought my 88 supra turbo the dude didn't tell me the transmission would break within 3 weaks because he loved to do 360's...backwards

i still miss that car and it's been 5 years now... best purchase i've ever done even if it was beat down ;-)

Wouldn't the business world lose it's challenge if everyone was honest?
;-) just my 2 cents
Edited by Tatsuo - 12/12/08 at 12:14pm
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