Overclocking 2500k

snips86x

snips86x

snips86x

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I currently have an Asrock Z68 Extreme 7 Gen 3 board, paired with a 2500k & 16gb Patriot 1866 RAM.

I was able to overclock to 4.2ghz, but was unable to re-enable the power saving mode. My chip is idling at 40 ish and the fan on the CPU cooler is not running overly quiet either and I'm now at the stage where I'd like to get it sorted.

My current BIOS settings are:

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What setting do I need to enable power save mode?
Also, If I can get 4.3/4.4 without much more movement, that would be great, but not essential.
 
wazza300 said:
you need to enable offset cpu voltage

then find the right amount of offset to equal your load cpu v

each llc level affects the load voltage too so I would try with +0.010v offset and try level 3 or level 4 llc and see what cpu v it gives you in cpu-z while stressing

enable all power saving and x.m.p for your memory if it supports it and maybe try 1.10v cpu/vtt(vtt voltage) for 16gb of memory
Click to expand...

Would that include the 'C' states too?
As for XMP, I think it's already enabled, but will check anyhow.
Also, which way for the offset should I be going if stressing fails? + or -?
 
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wazza300 said:
more offset but for 4.2ghz you might only need a little amount,only add one or two clicks at a time and check what the load cpu v is

you can also undervolt the voltage if its too much by using a negative offset so -0.005v ect

and yes enable all c states and eist

remebr to set vtt from stock 1.05 to 1.10v for the memory controller
Click to expand...

Ok.

Does it matter if I leave the RAM or does it have to be done at the same time?

Just to clarify before I attempt:
Enable Power Saving, C3 and C6
Set LLC to Level 3
CPU vcore offset to +0.010v
VTT to 1.10
 
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K2 doom at the moment. Have been thinking about changing to H100, but not yet. I've managed to boot in to Windows and prime hits 60 with your settings.

Last time i attempted 4.5, the thermal throttling kicked in.
 
wazza300 said:
what's the load cpu voltage while stressing? you need to keep an eye on that with each offset and llc change

try a 45x multi now and add one click on offset voltage so +0.015v

then post what load cpu v is and load temps
Click to expand...

CPUID is reporting 0.976 Min and 1.320 max. This fluctuates between 1.304 and the max value.

Currently, 62 is the max temp so far, but seems comfortable around the 58-59 mark.
 
wazza300 said:
is it a pwm fan connected to cpu fan header? look in the bios for fan control and set to pwm or voltage,it should then ramp up and down according to temps

and if you want to stay at 4.2ghz try lowering the offset now to get load cpu v as low as possible which = lower temps
Click to expand...

This is what i struggled to work out. When setting the CPU fan to auto, it gives you a target temp and a target fan speed from level 1 to 9.

Any ideas as Google didn't really help much when i last looked at this.
 
Changed speed spectrum and rebooted. Prime is not stressing at 4.5ghz, but dipping in and out of 4.1-4.3, seems happy at 4.2.

Do you think my cooling is inadequate?
 
Just come back after 5ish mins and the ratio/speed on HwiNFO is showing 4.5, but it's not steady, changing between 4.3 and 4.5. CPU-Z is showing the less irregularity with the multi sporadically changing from 44 to 45.

Yes, the ratio for turbo was set to auto. Temps still look good at 63 max, 60 min.
 
wazza300 said:
it might depend on the stress,it will drop on occasion to 4.4ghz esp in prime95

in intel burn test it should stay at 4.5ghz but that program heats up the cpu so only try a standard stress test with it if you wanted to try

temps are fine and voltage

did you cure the fan speed running full pelt?
Click to expand...

Not really. There is no direct PWM option in the BIOS but setting the target temp to 65 and the speed to level 9 reduced the overall speed by a small margin. I'm using a TY-147 so it's pretty quiet which is good.

I tested at level 1 and it dropped the fan speed to 790rpm with the CPU temp in the BIOS at 48. I think it's going to be trial and error and some investigation into my board as I'm not all clued up on the new BIOS layouts.

In all fairness, there is going to be little chance of the CPU being stressed while gaming as at 4.2 on BF3, it would get to 75% usage. I may re-evaluate when I get my 7970, but I'll see how 4.5 goes in the mean time. Bit worried it's going to be heat and power all for nothing much of a performance boost.
 
wazza300 said:
yeah try each level till its comfortable

youll have to see how it is now over the next few days regarding stability,play a few games ect and post back,maybe you can lower voltages a little more but atm they are decent for 4.5ghz
Click to expand...

It's already better than it was before. Idle temp is now 33 where it used to be at least 40-42.

Do you think it would be worth setting the Turbo to a manual x45?
 
What's your spec?

Surely by setting the benchmark at 65deg and the speed level at 9, it should only hit full speed at that temp. Intel burn in is better, but still slight fluctuation with temps hitting only 55.

I think this will be it for now, I'm happy with the results and will test on BF3 later.
 
wazza300 said:
could try it see if it makes any difference,but all I do on both my asus/gigabyte boards is set 45x cpu multi and leave all turbo ratio's on auto

but its worth a try to make sure
Click to expand...

After testing with IntelBurnIn, I think I'll leave it as it does work. I don't think the CPU will ever get to 100% load in what I'll be doing anyway (Gaming & Photography) so the current setting shouldn't be an issue.

Really appreciate your help though. It's been one hell of a learning curve to say the least.
 
I thought the thermal throttling kicked in at 60? It may just be my own settings which were showing something like that.
 
So my next question back to the memory. Assuming XMP is enabled, should I just be looking at changing the VTT to 1.10 and what should this achive?
 
I did a 3D Mark 11 run last night, as I'm interested in the performance comparison once my 7970 arrives, and it reported the RAM was running at 800. Is this correct?

If I wanted to overclock my RAM, would it just be a matter of selecting the XMP profile and changing the VTT?

Update: I did change to the XMP by manually selecting it as well as changing the VTT, but the PC failed to boot.
 
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