Intel turbo boost not working

Soselia · Jul 23, 2014

I have intel i5 4570 core and asus b85m-e motherboard.
I have turbo mode in cpu power managment enabled . Eist enabled. In boot performence mode i have turbo performence selected.
Though at 100% utilization it still has 3.17 ghz speed. And max speed is 3.2 in task manager. Nowhere near 3.6
Temperature is always under 60 celsius
What could be wrong ? Any settings i must change?

i7Baby · Jul 23, 2014

Have you changed Vcore at all? That can stop Boost working.

Go into bios and do a reset.

Lee-m · Jul 23, 2014

what are you using to read that core speed?

Soselia · Jul 23, 2014

Cpu core voltage is 0.985V auto. Should i change it? I used windows 8.1 task manager

Lee-m · Jul 23, 2014

I don't use windows 8, my self. Does it's task manager give you a real time read out of core frequency ? no other task manager ever has.

CPU-Z is the standard tool tool for monitoring this stuff.

i7Baby · Jul 23, 2014

You should be able to read it from bios/uefi.

Soselia · Jul 23, 2014

Lee-m it seems so.
I7baby i haven't changed vcore settings. Cpu core voltage is set on auto
So i changed system performence to asus optimal from normal in easy bios . It runs at 3.39 now and temperature went to 65. Any ideas how to get it to 3.6 ?

i7Baby · Jul 23, 2014

Go into bios and do a reset.

Soselia · Jul 23, 2014

I am in bios. Reset of what and why?

And should i leave eist on, can it lower boost speed?

i7Baby · Jul 23, 2014

Rest your bios - it goes back to default values. Read your mobo manual.

Soselia · Jul 23, 2014

This are settings that came with default because of this i don't think resetting would do any good.

i7Baby · Jul 23, 2014

Just try it. If it won't reset, then you need to get another motherboard.

Soselia · Jul 23, 2014

Did reset. Now its back to 3.2 from 3.4 . What's next?
I'm asking what settings might need change to support higher speed and should all cores be able to run at 3.6 at the same time, is that how turbo boost works?

P.s. i want to try changing settings so that i know if somethings wrong for sure and then exchange it with warranty

i7Baby · Jul 23, 2014

It'll run at 3.2 till you load it. That's when it will boost itself to 3.6GHz.

Download and try the Intel Test - https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=19792 - to check it.

Soselia · Jul 23, 2014

I'm using prime95 now to check stability. Speed is around 3.4- 3.5 . Temp under 65
Is it ok or is something defective?

DubbleClick · Jul 23, 2014

Thats good.
3.6 is the single core turbo boost, 3.5 for 3 cores and 3.4 for 4 cores. So it's normal you don't see the 3.6 under full load of all cores.

i7Baby · Jul 23, 2014

65C is OK. Don't push it too long. Stop and let it cool down after the temp settles down - 10 mins Prime 95 will do.

Prime only tests a few cores at a time. You should use the Intel Test.

Soselia · Jul 24, 2014

Can't click "i accept terms ... " in intel test download page. What to do?

i7Baby · Jul 24, 2014

You don't need it now. You've seen the cpu boost when using Prime95.

Intel turbo boost not working

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