Intel HD 4600 clock speed "stuck" at 600MHz!

Bradleyvarol

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Jan 29, 2015
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Hello Tom's Hardware users! Thanks for viewing my thread.

Introduction to my problem
4 months ago I built my first PC (specs below). Everything was great, and then I overclocked my CPU. I was very careful, stopping at 4.3GHz @ 1.2v. Suddenly there was stuttering, which was a lot worse when i removed/disabled my GPU. I immediately reset the BIOS/CMOS, and it was still there. I made a post here listing everything that I was trying, with no success. Eventually I RMA the CPU and the stuttering was gone - I presumed this was a CPU problem.

2 weeks ago I decieded to OC the new chip. This time, I made it to 4.7GHz @ 1.3v, and the same stuttering is back. I've tried a few of the obvious things (except a re-install of Windows - I will do this when i have time).

MY PROBLEM
This evening i noticed that the iGPU (Intel HD 4600) is running at 600MHz. This would certainly explain why the desktop is so laggy (literally, text doesn't appear as I type), and why everything stutters. I feel like I have potentially discovered the cause of the stuttering that is driving me insane. Why is it not clocking up?

The stuttering
There is micro-stuttering which is almost like a frame is being lost every few frames. When dragging a window (or turning in a game), it is not smooth. Also, there is periodic stuttering every second or so. It's more profound in Minecraft than it is in Battlefield, which points towards the CPU again. It is present on Youtube (yes, i've tried various browsers), the desktop, software, and games.

What I have tried!
- Updated BIOS,

Please see my old thread if you would like to know what i tried back then:
http://www.tomshardware.co.uk/answers/id-2512740/stuttering-windows-games.html


THANK YOU!


SPECS:
- ASRock Extreme4 z97,
- Intel i5-4690K @ 4.7GHz @ 1.3v,
- G.SKILL Ripjaws X 16GB 2133MHz CAS9,
- EVGA GTX 780 3GB,
- Seasonic Platinum 1000W,
- WD 1TB HDDs x2,
- Samsung EVO 120GB SSD.
 
1) Go into BIOS and set defaults (I know you did before). Should be one of the "F" keys. If unsure that you reset the entire BIOS, you can also reset the CMOS (See manual) or shut down and remove the battery for a minute and reinsert.

2) Shut down and make sure you have attached the monitor to the Graphics Card not the motherboard. As mentioned above, why are you using the iGPU?

It is possible to use the iGPU and the graphics card together (i.e. iGPU for Quicksync) however if the monitor is attached to the motherboard it's not using your GTX780 at all.

Summary:
Your problem is a little confusing to me. Using the new CPU suggested it was simply an issue with your settings and it would reset the BIOS automatically thus fixing your problem.

However you did apparently reset your BIOS the 2nd time and still have the issue which should solve the issue since you didn't have it before overclocking. Furthermore it's confusing if you're using the iGPU or GTX780 (depends on what the monitor is connected to). I believe the BIOS default would have the iGPU disabled so leave it there.
 

Bradleyvarol

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Jan 29, 2015
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I am trying to use the GTX780, but there is stuttering. The stuttering is worse when i disable my 780, hence why I believe that this is CPU related. I will be doing a full re-install of Windows tonight. I will install all the drivers (ME, INF, Realtek, Intel HD) from ASRock site, and I will only use one monitor. I have noticed that the problem worsens a few seconds after boot, so it may be software related this time, although I highly doubt that. I feel like this is a 4690K problem, as i have found another post online with the same problem, but for him a full reinstall fixed it.
 

kwa-e

Admirable
Windows should be your last resort, since it sounds like it is a driver issue it is likely it is due to faulty drivers, using Guru3d's driver sweeper remove any remnants of old drivers from ATI and NVIDIA, and install a fresh copy of the card's drivers from NVidia's official website.
 

Bradleyvarol

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Jan 29, 2015
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Will do now.
 

Bradleyvarol

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Jan 29, 2015
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Problem still persists. I am sure that this is a hardware problem, I ran the Intel Processor Diagnostic Tool, and that didn't push my iGPU clocks past 600MHz. Can someone clarify the speeds that 4600 should reach under load?