Any way to limit lower multiplier during 5820K OC?

[RejZoR]

I'm using SpeedStep (yes, I want it to downclock when idle or under low load) while overclocking and I've notice something peculiar which is a bit annoying.

If I'm running CPU stock, it'll clock to 3.6GHz during load, but during low load or idle, it'll stay at around 2GHz with multi of 20x.

However, when I'm using multi of 45, resulting 4.5GHz CPU clock, when not under load, it goes all the way down to multi 12, resulting in just 1.2GHz CPU clock and things feel a bit sluggish on desktop moving windows around and doing things that don't require much CPU, but they require it enough to be silky smooth and they aren't getting it at 1.2GHz.

I've noticed CPU cache allows lower and upper multiplier control, but not for core clock. Any other way?

 

[eidairaman1]

I'm suspecting this is the same dealings as cool n quiet, bios parameters and internal cpu instructions for this mode might be limited to stock config and staying within turbo, once you go over turbo it might not be able to detect everything properly and thus causes your situation. I think if a board, chipset, cpu engineer were kind enough they would give a concrete answer. I'm unsure if there is a software solution to profile certain programs akin to what we can do with videocards now. Only oyher thing is setting affinity for explorer or something...

 

[RejZoR]

I mean, based on multiplier range, it has 12-45. Which is fine in terms of what it's working with. But it's strange that when running stock, it behaves the same, except the lower multi isn't 12x in that case. Not sure why. Gotta check if CPU-Z also shows 12-36 range when stock or it's 20-36 or something...

 

[Hnykill22]

What cooler are you using ?

 

[RejZoR]

What cooler are you using ?

Cooler Master Nepton 120XL...

Ok, now I've noticed that it's just Windows that goes weird, CPU-Z seems to still show 1.2GHz even at stock clocks. It's funny that Windows is showing incorrect lower clock with stocks speeds, but correct with overclocked :lol:

 

[JalleR]

You can use the percentage in windows Power options to keep the cpu in a higher Idle/low load state try 50% instead om 0%

It is under Processor power management
minimum processor state 0% is the lowest multiplier your cpu supports 100% is the highest.

 

[RejZoR]

@JalleR
Good idea, although it's not behaving as expected. At 50% it barely made a difference, at 100% it's at around 2.8 GHz per Task Manager. CPU-Z is still showing 1.2 GHz though for some reason.

 

[X828]

I think I'd clear CMOS and start over... Very strange behavior indeed. Your low point should be 800Mhz at 5% in Windows power management (going lower than 5 yeilds no difference at least that's the case with my 4770k). Save your OC settings on paper and start over... Something's mucked up.

 

[Vya Domus]

On every computer that I have used, CPU-Z only shows the max clock correctly. Task manager usually shows correct minimum clocks.

 

[jaggerwild]

Have you tried un clicking(or clicking)in the adjustments in RealTemp? I know I could make my 3930K stay at limit or fluctuate depending on real Temp settings.