I have the asus sabertooth z77 mobo with i73770k 3.5 stock

 

I'm confused as to what to change in the UEFI BIOS to oc my CPU.

You must have a good cooling system before you even start thinking about overclocking. Check Noctua for Air cooling or corsair H100 liquid cooler. H100 has some advantages, no too much space required and arround 100MHz higher clock can be reached vs Noctua. 

Then, you should consider(especially if you want higher overclock)de-lidding for ivy bridge, great guide here on Avsim: http://forum.avsim.net/topic/387006-ivy-bridge-pictorial-de-lidding-guide/

 

After that you need to spend some time to find stable settings. Here you can find a lot of good guides how to do that http://www.overclock.net/f/5/intel-cpus

 

But take some time, at least a couple of days to study about overclocking. You must know limits for your CPU.

 

You can destroy CPU if you don't know what are you doing

Hi there...

 

I have the same Mobo and Cpu and I found some good tutorials on youtube specific to the sabertooth...sorry I can't be of more help than that but it was only a few changes and I have 4.5Ghz...haven't bothered to go any further...

 

Good luck!!!

If you are allready confused at this point I would recommend against doing any OC before you have read up and understood what the parameters in the BIOS do. You will also need a handful of software to check the stability of your rig after OC'ing.

 

The gain from an OC in FSX is minimal (unless you do an extreme OC), so you'll have to decide if OC'ing is worth it for you. If you use your computer for non-FSX stuff be aware that an unstable OC might corrupt files (such as photos and documents). It isn't always possible to be 100% sure of an OC's stability.

 

RAM is often the weakest part of the OC-chain. Make sure you have some of the absolute best chips on the market before attempting to OC. .

 

That said, you have an ASUS board, and they make some of the best OC hardware and software. I would check out the ASUS ROG site. Lots of good info there: http://rog.asus.com/

thanks..

I have been running my I5 2500k OC at 4.5 for over two years now and have not had a problem.  i just read some threads on some other forums on my processor and a couple of guides and the performance improvement was pretty big. It's worth it to OC..    

 

Now your processor has a lid..   I would read up on that before you attempt to remove it and be careful. 

ok.. I watched the vid series.. very good and I'm o/c now at 4.5 and steady as a rock. I'm running prime95 and I see a steady temp of 65C accross the cores.. so I'm happy, that is good yeah?

 

my question that I have that wasn't covered.. was

 

what is the relationship of the cpu voltage vs the multiplier

 

the vid just said to start at 1.27 volts and 45 mult..

I did and all is good.. but suppose I want to bump it to 4.8 , I know I have to put in a mult of 48 but what about my cpu voltage?  that part is the most confusing.. is there a chart that shows the comparison? 

 

if you want this mult.. then set your CPU Volt to xyz.. etc

There is no chart because what will work for one CPU may be different for another.  But as you increase the multiplyer you will have to increase the voltage to support it (and RAM can come into play).  So take baby steps.  I've been running my 2600K for several years now at 4.8GHz with a voltage of 1.480 with no issues.  I took it to 5GHz but did not see an improvements with P3D so I took it down a notch.  Got good air cooling (Noctua) and a good full size PC case to support it (HAFX).

ok.. I watched the vid series.. very good and I'm o/c now at 4.5 and steady as a rock. I'm running prime95 and I see a steady temp of 65C accross the cores.. so I'm happy, that is good yeah?

 

my question that I have that wasn't covered.. was

 

what is the relationship of the cpu voltage vs the multiplier

 

the vid just said to start at 1.27 volts and 45 mult..

I did and all is good.. but suppose I want to bump it to 4.8 , I know I have to put in a mult of 48 but what about my cpu voltage?  that part is the most confusing.. is there a chart that shows the comparison? 

 

if you want this mult.. then set your CPU Volt to xyz.. etc

Each system is different. What you want is the HIGHEST clock at the LOWEST voltage. If you are at 4.5 with 1.27 - leave it at 1.27 and bump the multiplier to 4.8 and see if it is stable. If not, kick the voltage up to 1.28 and test again. It's a trial and error and you have to creep up on it. But remember more volts = higher temps.

 

Vic

P.S. Very important, don't use "automatic" option for Vcore. This is realy dangerous, especially on assus mainboards - it will send your Vcore a way over maximum.

 

Offset or Manual mode only for Vcore. 

 

Mine is at stable 4.8GHz for over a year, absolutely no problems. And no regrets, this is one of the most important things to do for FSX performance

ok.. that is great help.. thanks

Good luck and Godspeed Brian! Let me know if you find significant improvement in FSX. I didn't, even at 5,2GHz my ORBX scenery at full monty was a stuttering experience

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Check Noctua for Air cooling or corsair H100 liquid cooler. H100 has some advantages, no too much space required and arround 100MHz higher clock can be reached vs Noctua. 

 

 

 

 

If you mean the Noctua NHD-14, then no, that's not correct. You refer to the H100, but even in regard to the superior H100i The Noctua NH-D14 performs much better. The D14 is also very quiet, quieter at full rpm than the H100i.

 

The only Corsair closed loop cooler that beats the D14 is the Corsair H110. And not by much.

 

 

Temps here, overclocked and under load...

 

http://www.guru3d.co..._review,13.html

 

H100i 76 degrees

Kraken X60 70 degrees [Noisy higher RPM fans]

Corsair H110 72 degrees [Very quiet]

NH-D14 72 degrees [Very quiet]

 

Noise levels here...

 

http://www.guru3d.co..._review,11.html

 

NH-D14 and H110 are the best in terms of heat sink/radiator efficiency. If they fit in your case.

 

 

 

You can destroy CPU if you don't know what are you doing

 

 

It has happened, but quite rare these days. A CPU will throttle back if too hot, and shut down to avoid damage.

 

In addition, these days for a very small sum, Intel will insure your CPU against overclocking damage. For my 3770K it cost £18.

 

 

the vid just said to start at 1.27 volts and 45 mult..

I did and all is good.. but suppose I want to bump it to 4.8 , I know I have to put in a mult of 48 but what about my cpu voltage?  that part is the most confusing.. is there a chart that shows the comparison? 

 

 

Depends how well you've done in the silicon lottery. All CPU's are different, some require higher voltage than others for a given clock speed. My 3770K for example requires higher voltage than most.