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Why overclock in BIOS?

post #1 of 19
Thread Starter 
I just got my new system together, an mATX build with an Asus P8P67-M Pro mobo, i5-2500k, 8G corsair vengeance 1600 ram, and a corsair H70 cooler.

Super happy with the build, but I have some questions about overclocking.

Primarily, why should I not use the Asus Turbo V EVO software to overclock? Everywhere I see articles about overclocking, everyone pooh poohs the OC software and says you gotta do it in bios.

I played with this utility a bit, and got a 4.7 stable OC pretty much in 10 minutes. And speedstep appears to be still enabled, so my machine is nice and cool when not under load and then kicks it in when load testing.

My last build I spent DAYS OCing my board- and while that was fun for me, its pretty clear there is a lot of time and money being invested in these tools, so it seems inevitable that at some point there is no point to using bios to overclock.

I'm wondering if that time is now.

What am I missing? If I have a 4.7OC which is fine by me, is stable in prime95, and IBT, what are the reasons I should go and spend a lot of time noodling in the bios? Squeezing out 4.8 may not be worth it.

But to be honest, I don't MIND doing that, but I don't know what the point would be- if there are real technical reasons why I should go OC in bios, I would very much like to hear them!

Thanks!
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post #2 of 19
Would like to see some responses on this out of curiousity.
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post #3 of 19
Usually those auto-overclockers ramp voltages up higher than your chip needs.

However, I have used ASUS's BIOS OCing for an ASROCK P45X3 Deluxe and sure enough it got everything perfect for my E8400 on the first try. Hit 4.0 and 500 FSB with low voltage. YMMV.
Edited by Draygonn - 4/10/11 at 11:37pm
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post #4 of 19
Stability,
Won't overvolt components
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post #5 of 19
With Intel's unlocked chips plus the new SB architecture there is much less reason to OC in BIOS. There are only a few settings that need to be changed, and none require a reboot. Other than vdroop and a few other things.

For example on X58 your board reboots every time you change your uncore speed. I haven't OCed P67 yet but the "system agent" thing looks pretty simple. For all the people shouting about stability and overvoltage... you can set voltage manually instead of having it auto scale(your argument is invalid ).
post #6 of 19
Nice OC.

OCing with software will usually result in higher volatges than necessary. This will result in higher temps or dangerous voltages.

Example - when I OCed to 4GHz with software, my PLL was set at 1.8v. It should never go above 1.5v...

You may certainly use the software to gain a ballpark setting and then transfer the inputs to your BIOS and fine tune from there.

Its not just a purist thing... these are very real reasons not to rely on software Ocing.
post #7 of 19
The better question is, why software? When you set it in the bios, you don't need 3rd party applications just to run your settings the way you want it. Running all that extra software is unnecessary, and you would have to redial in your settings when changing between operating systems (e.g. dual boot or a new installation). When using an operating system like Linux, it is also probable that these software tools are not readily available.

The only reason to use software (minus GPU stuff like Afterburner) is to squeeze out the last few Mhz for benching or something where you might not normally be able to POST. Informally, in my own personal view, I like to think software is for people who don't really know what they're doing. BIOS is where the men go.
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post #8 of 19
There's more overclocking options in BIOS than there are in any Windows-based overclocking software. Have always viewed it as a generic form of overclocking. I'd rather overclock my hardware in BIOS, not in a Windows environment, nor after Windows loads.
Edited by Diabolical999 - 4/10/11 at 11:36pm
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post #9 of 19
Quote:
Originally Posted by Diabolical999 View Post
There's more overclocking options in BIOS than there are in any Windows-based overclocking software.
I agree with this. And even if you can change some of those "deep down" settings (IOH/ICH clock skew, CPU clock drive, PCI-E clock drive etc) the OC program will tell you that the new settings will be applied at the next reboot, which kind of defeats the purpose of software OC.
post #10 of 19
Thread Starter 
Quote:
Originally Posted by Dopamin3 View Post
The better question is, why software?
The better reason for software is.... time. 10 min vs hours. Time is not cheap, at least I don't feel my time is. That would be the main reason for me.
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