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Upgraded CPU, now BSOD/boot issues

post #1 of 17
Thread Starter 
This is just a work-PC with performance, no gaming, etc .. but hopefully you can help.

MSI Z170A Krait Gaming 3X - latest Bios V290
i7-7700K
H115i Cooling System with 2 additional fans (push/pull)
Corsair Dominator Platinum 2x 16GB 2133/3466Mhz

I simply upgraded my old i7-6700 to the i7-7700k. Cpu out, Cpu in. Done.
Everything in Bios was set to default, JUST XMP was "on" to have the ram run at speed (exactly like with the 6700)

Everything booted up, Win10 saw the new CPU, Device manager updated to 7700K - all good.

Then I started getting "WHEA_UNCORRECTABLE_ERROR" - the PC just randomly froze. Only way to get it to work again was to press power for 5 second and shut it off hard.

After trying a bunch of stuff, I went into Bios and turned off XMP - voila.. works perfect, no issues whatsoever but obviously Id like my ram to run at speed.
I tested with AIDA64 - shows 2133Mhz ... System stability test runs flawless as well.

I left XMP off and manually set speed/voltage.

Voltage is 1.35V per Corsair for all tests.

Set 3466 - Wont boot - Asus Bios tells me OC failure
Set 3300 - as above
Set 3000 - Windows boots! Runs for maybe 10minutes then WHEA error again...
Set 2900 - Seems to work now ... AIDA64 System stability test "confirms"

What's going on here?

No way the i7-6700 can handle more speed than the 7700k???

Please help!

PS: I noticed Core #3 runs 10C cooler thatn 1,2 and 4? Normal for this CPU?
Edited by Matce - 9/22/17 at 5:49pm
post #2 of 17
Quote:
Originally Posted by Matce View Post

This is just a work-PC with performance, no gaming, etc .. but hopefully you can help.

Asus Z170A Krait Gaming 3X - latest Bios V290
i7-7700K
H115i Cooling System with 2 additional fans (push/pull)
Corsair Dominator Platinum 2x 16GB 2133/3466Mhz

I simply upgraded my old i7-6700 to the i7-7700k. Cpu out, Cpu in. Done.
Everything in Bios was set to default, JUST XMP was "on" to have the ram run at speed (exactly like with the 6700)

Everything booted up, Win10 saw the new CPU, Device manager updated to 7700K - all good.

Then I started getting "WHEA_UNCORRECTABLE_ERROR" - the PC just randomly froze. Only way to get it to work again was to press power for 5 second and shut it off hard.

After trying a bunch of stuff, I went into Bios and turned off XMP - voila.. works perfect, no issues whatsoever but obviously Id like my ram to run at speed.
I tested with AIDA64 - shows 2133Mhz ... System stability test runs flawless as well.

I left XMP off and manually set speed/voltage.

Voltage is 1.35V per Corsair for all tests.

Set 3466 - Wont boot - Asus Bios tells me OC failure
Set 3300 - as above
Set 3000 - Windows boots! Runs for maybe 10minutes then WHEA error again...
Set 2900 - Seems to work now ... AIDA64 System stability test "confirms"

What's going on here?

No way the i7-6700 can handle more speed than the 7700k???

Please help!

PS: I noticed Core #3 runs 10C cooler thatn 1,2 and 4? Normal for this CPU?
It could be that your 7700K has a weaker memory controller but I haven't heard of a 7700K that wont run 3600Mhz memory. What is your memory controller voltage set too?
post #3 of 17
Thread Starter 
I don't know - where would I find this?

Everything in BIOS is set to "AUTO" except for RAM Speed and RAM Voltage.

thanks!
post #4 of 17
Quote:
Originally Posted by Matce View Post

I don't know - where would I find this?

Everything in BIOS is set to "AUTO" except for RAM Speed and RAM Voltage.

thanks!
Look for VCCIO and possibly VCCSA they may need some manual adjustment smile.gif
Edited by scracy - 9/22/17 at 6:26pm
post #5 of 17
Quote:
Originally Posted by scracy View Post

Look for VCCIO and possibly VCCSA they may need some manual adjustment smile.gif
Also up to 10 degrees C difference between cores whilst not great is within Intel spec of +/-5 degrees C. Your board is actually an MSI not Asus so terminology for various voltages maybe different.
post #6 of 17
Thread Starter 
Quote:
Originally Posted by scracy View Post

Also up to 10 degrees C difference between cores whilst not great is within Intel spec of +/-5 degrees C. Your board is actually an MSI not Asus so terminology for various voltages maybe different.

Yeah youre correct of course.. I dunno why I wrote ASUS lol
Ill check on that voltage...
post #7 of 17
Thread Starter 


I set both SA and IO to 1.3V.

3000Mhz boots, but still crashes after a few minutes frown.gif

Set to 1.2V (lower!?).

3000 Mhz booted, runs, but crashes after a while at idle ...
3100 Mhz also boots now , but crashed in Win10


Any experts here? smile.gif

As of now MAX is 2900Mhz on "AUTO" voltages...
Edited by Matce - 9/22/17 at 10:56pm
post #8 of 17
Quote:
Originally Posted by Matce View Post



I set both SA and IO to 1.3V.

3000Mhz boots, but still crashes after a few minutes frown.gif

Set to 1.2V (lower!?).

3000 Mhz seems to run, survives stability test as well
3100 Mhz also boots now , but crashed in Win10


Any experts here? smile.gif
Im no expert but try 1.2V for VCCIO and 1.22V for VCCSA
post #9 of 17
Thread Starter 
Quote:
Originally Posted by scracy View Post

Im no expert but try 1.2V for VCCIO and 1.22V for VCCSA

I can try that... What frequency?

So far the maximum stable speed is 2900Mhz ... Set to AUTO or 1.2V on both.
post #10 of 17
Quote:
Originally Posted by Matce View Post

I can try that... What frequency?

So far the maximum stable speed is 2900Mhz ... Set to AUTO or 1.2V on both.
My corsair Dominator Platinum @3200Mhz needs those voltages suggested but every CPU is different, perhaps ask this question on the Kabylake overclocking thread as there are members there that know more than me regarding memory smile.gif
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