4770k stuck at x8 multiplier

m1ddy · Dec 7, 2015

Hi All,

I've got a 4770k and an Asrock Z97 Extreme6/3.1. Put it together last week and its been fine over the weekend. However, this morning when you turned it on it powered on for about 1 second then kept cycling itself on/off. I reseated all the RAM and powered it back up and that seemed to work. However, the system was sluggish and after checking CPU-Z it was running at 799Mhz with a multiplier of 8. I've tried going into the BIOS and forcing it to use x35 on all cores and per core but when booting back to windows its still stuck at x8. Rather annoying! I've upgraded the BIOS to the latest version (1.4) I believe. Any ideas?

Thanks

Johan Kryger Haglert · Dec 7, 2015

Some power-saving feature?
Does the CPU fan run or not? Maybe it measure that and wouldn't boot up at all if it doesn't. What I mean is whatever it may throttle to lower performance to protect itself.

photonboy · Dec 7, 2015

Could be:
- PSU
- motherboard
- bad memory
- bad CPU

I'd also recommend running memtest86: http://www.memtest86.com/

Other:

1) Physically remove the graphics card if you have one, and unhook all drives. Only hook the Windows drive up prior to the step it's needed in the following.

2) See motherboard manual for slot to use with a SINGLE STICK (if it matters) and use only one stick, then

3) go into the BIOS, set to factory default values (don't use XMP yet) and SAVE, then boot back into the BIOS and confirm the settings were saved.

4) run Memtest86 on that single stick (complete one full pass)

(If errors, try a different stick... if errors again, try a different slot)

5) Boot to Windows, then open TASK MANAGER-> Performance-> CPU-> show all EIGHT threads (not a single CPU graph... you'll figure it out)

*Observe CPU "Speed" which should be changing... keep windows open then...

6) run the CPU diagnostic in Windows: https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool-64-bit-

*Now, observe the Task Manager for CPU performance. The "Speed" should be close to the TURBO value which I think is 3.9GHz.

7) ALSO, during these tests you can start CORETEMP. It doesn't sound like you are overheating though since you mention immediate reboots. Still, worth testing. It varies but with a STOCK cooler I doubt you'd see more than 80degC after the Intel CPU diagnostic stress portion kicks in. CPU core throttling is somewhere around 100degC (I forget exact value).

So what?

If still stuck, at this point I'd:
a) Swap power supply, then
b) Swap motherboard (contact Asrock text support)

The power supply is a lot easier, and for using just the iGPU you can get by with even a 200W compatible power supply for your testing.

m1ddy · Dec 7, 2015

Johan Kryger Haglert :

I've looked through the BIOS and nothing resembling power saving seems to be enabled. CPU fan is running and coretemp is saying all 4 cores are at about 30 degrees C atm.

m1ddy · Dec 7, 2015

photonboy :

Could be:
- PSU
- motherboard
- bad memory
- bad CPU

I'd also recommend running memtest86: http://www.memtest86.com/

Other:

1) Physically remove the graphics card if you have one, and unhook all drives. Only hook the Windows drive up prior to the step it's needed in the following.

2) See motherboard manual for slot to use with a SINGLE STICK (if it matters) and use only one stick, then

3) go into the BIOS, set to factory default values (don't use XMP yet) and SAVE, then boot back into the BIOS and confirm the settings were saved.

4) run Memtest86 on that single stick (complete one full pass)

(If errors, try a different stick... if errors again, try a different slot)

5) Boot to Windows, then open TASK MANAGER-> Performance-> CPU-> show all EIGHT threads (not a single CPU graph... you'll figure it out)

*Observe CPU "Speed" which should be changing... keep windows open then...

6) run the CPU diagnostic in Windows: https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool-64-bit-

*Now, observe the Task Manager for CPU performance. The "Speed" should be close to the TURBO value which I think is 3.9GHz.

7) ALSO, during these tests you can start CORETEMP. It doesn't sound like you are overheating though since you mention immediate reboots. Still, worth testing. It varies but with a STOCK cooler I doubt you'd see more than 80degC after the Intel CPU diagnostic stress portion kicks in. CPU core throttling is somewhere around 100degC (I forget exact value).

So what?

If still stuck, at this point I'd:
a) Swap power supply, then
b) Swap motherboard (contact Asrock text support)

The power supply is a lot easier, and for using just the iGPU you can get by with even a 200W compatible power supply for your testing.

Hi,

Thanks for your answer. I memtested all 4 DIMMS and one had a couple of errors on two of the tests. I've removed this pair and am now running 2 x 4GB DIMMS. I've reset the UEFI settings but I'm still getting 800Mhz as my CPU speed. I ran the Intel test app and it passed but it ran the whole thing at 800Mhz. Temps didnt go above 30 degrees. Bit stuck now as I dont have another PSU to test with

M1ddy

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4770k stuck at x8 multiplier

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