Help overclocking i5-4670k

KDK · 16 May 2015 at 19:03

Ok well after doing that now my pc is on but I just have a black screen. I have no options to get into bios or anything. Guess I broke it somehow lol

stulid · 16 May 2015 at 19:04

Clear the CMOS, try again.

P.S go back to 44X.

GO slow and work it out/get a feel for it.

KDK · 16 May 2015 at 19:05

How do I clear the CMOS?

stulid · 16 May 2015 at 19:06

Power off at the wall, take battery out, put the kettle on, refit and try it again.

KDK · 16 May 2015 at 19:18

Well this is fun

learning new things everyday. Except I have to remove my gfx card to get to that battery which is a bit stupid but am having fun so it's ok lol

stulid · 16 May 2015 at 19:22

Some boards have a clearCMOS button to make it simple, all boards have two little pins you short together for a moment to clear the CMOS, but I don't know or care where it is on your board, so taking the actual battery out is easier for me to say.

KDK · 16 May 2015 at 19:36

Idle

Cinebench

So now I need to change the offset to the difference between my normal value and the 1.332? I think. Also my temps were at highs of 84 during that test.

stulid · 16 May 2015 at 19:37

Its high as you are using more voltage than you need.

Did you add any offset to that last CPU-Z screen? if so what value?

It wont be the difference between 0.971v and 1.332V as the 0.971V value is the idle value (speedstep).

You just want to know what it is at 3.4Ghz/stock.

KDK · 16 May 2015 at 19:44

0.215 is what I changed it to last time as at 3.4ghz it is at 1.051v so I added the 0.215 so that it would go to the 1.269 it was using earlier. I am going along the right lines here aren't I? Or do I have it all wrong

stulid · 16 May 2015 at 19:47

Thats the right lines.

But as you can see its too high so set it to 0.175 which should take it just under 1.3V.

KDK · 16 May 2015 at 19:58

78 was highest temp when on Cinebench that time. I used the offset of 0.175 for this test.

Am I right in thinking that when I change the 45 to say 46, I would run the test see the difference from idle to when its at load and then use the difference to add to the offset?

stulid · 16 May 2015 at 20:02

No, as its not a scalable value

Some CPUs suck and need lots of volts to do just 4.2Ghz, some need little volts to do 4.6Ghz but then need much much more to go higher, some do scale well and equally.

Not all CPUs are the same and this term is called "silicon lottery".

Yours may do 4.6Ghz without an more Offset.

You are at a frequency where many people would be more than happy with.

What you should do is take another 0.01V away (so its 1.283'ish) from the offset and test it, and again and again.

KDK · 16 May 2015 at 20:06

From what you have seen so far are you able to tell just where in this silicon lottery my CPU is standing? I am trying to find my 'sweet spot' for this CPU so what would my next step be?

Again I would like to thank you for spending your time helping me, I know I am a noob but with your input I am starting to get a better understanding of OC

stulid · 16 May 2015 at 20:08

I added a bit above, try and take a bit more away from the offset, this will reduce the temp.

Your CPu is looking a bit better than average I think.

KDK · 16 May 2015 at 20:15

I upped it to 4.6 and ran cinebench and it blue screened. So I guess I up the offset a little bit? Or does this mean I will only be to get it working at 4.5

stulid · 16 May 2015 at 20:16

Try 1.3V, but stop at 1.33V at the most.

KDK · 16 May 2015 at 21:12

Everything I tried at 4.6ghz ended up in Blue screens. So I guess I need to change other options to get that working. But I am back on 4.5ghz with an offset of 0.174 with a temp of 74. I tried 0.173 and for some reason I had a temp of 80 with that so I stuck with the 0.174.

My score in Cinebench has went from the very first time using it at 551 to 649 so I guess thats the performance change.

This is from the last test I done

I guess I have found my 'sweet spot' or atleast my sweet spot for 4.5ghz. Not sure if I am able to push it to 4.6 and beyond but I have no idea what else I should be changing to do so, so 4.5ghz will have to be enough

Thank you again for your help and patience you have helped me a lot!!

stulid · 16 May 2015 at 21:14

Theres something call LLC (loadline calibration) setting this to max will help with a thing called Vdroop.

This may actually increase the Vcore a bit above what you set/expect it to be, so again test and check.

Also keep in mind you have a "more budget orientated" board, a medium sized heatsink and not a massive dual tower like a NHD14.

KDK · 21 May 2016 at 22:09

Hello.

This is an old post but I have just noticed something in CPU-Z that I don't think is supposed to be happening.

My core speed is always at 4190.00 MHz but if I remember correctly the last time I was being helped with this, it is supposed to change when the CPU is at idle? What do I need to change to make that happen? Or is it ok the way it is?

Also I should let you know that I have not changed anything since the last time I was being helped on here, except unparking my cores so not sure if thats why it is doing it?

Thanks in advance for any help.

Danny75 · 23 May 2016 at 19:19

KDK said:
Hello.

This is an old post but I have just noticed something in CPU-Z that I don't think is supposed to be happening.

My core speed is always at 4190.00 MHz but if I remember correctly the last time I was being helped with this, it is supposed to change when the CPU is at idle? What do I need to change to make that happen? Or is it ok the way it is?

Also I should let you know that I have not changed anything since the last time I was being helped on here, except unparking my cores so not sure if thats why it is doing it?

Thanks in advance for any help.

Unparking your cores would in theory cause them to run at max frequency all the time. I'm not 100% sure because I only messed with unparking briefly a few years ago, then decided against it, and memory is vague where that's concerned. It may also depend on the particular unparking program you used.

But there is another quirk, and that's the max frequency at 4200 instead of 4500 like you had it. I don't see why unparking should cause that.

Anyway, if you're not happy with it, what it comes down to is revert the unparking you performed, and best to reset CMOS/BIOS again while you're at it, and repeat the steps for the 4500MHz OC you had.