I7-6700k overclocking issues

[Georgehillier]

Hi guys,

I've currently have an i7-6700k cooled by a h100i v2 water cooler along with an Asus Z170 Sabertooth S motherboard and 16gb 3000mhz ddr4 ram.

I've tried to overclock the chip but if I change anything it refuses to book after and just sits on a black screen with the fans spinning. Is this supposed to happen? As I assumed not.

To apply the overclock I chose the xmp profile, changed the multiplier to 42 (just as a starting point) and changed the voltage from 1.28 (stock for my cpu) to 1.325, I then also tried 1.35, both times it just sat there on a black screen for a few seconds before I got worried and turned it off.

Sorry if I'm being a noon and thanks for any answers in advanced

 

[elbert]

I suggest smaller increments. Try starting at only 41 on stock voltage. Taking things slow sometimes give you options due to learning how setting effect the overclock.

 

[Georgehillier]

I've managed to get 42 on stock voltage but without xmp, as soon as I enable to xmp profile it won't reboot and says overclocked failed... Is that an issue with ram or motherboard?

Also what kind of temps should I expect with stock speeds and stock voltage of 1.28? As I'm getting 70 degrees in some games even though my cpu has a h100i v2 to cool it and my gpu is also water cooled

 

[elbert]

I've managed to get 42 on stock voltage but without xmp, as soon as I enable to xmp profile it won't reboot and says overclocked failed... Is that an issue with ram or motherboard?

Also what kind of temps should I expect with stock speeds and stock voltage of 1.28? As I'm getting 70 degrees in some games even though my cpu has a h100i v2 to cool it and my gpu is also water cooled

So your having a memory issue when overclocking. You may want to overclock your ram manually then.

 

[iyzik]

I've managed to get 42 on stock voltage but without xmp, as soon as I enable to xmp profile it won't reboot and says overclocked failed... Is that an issue with ram or motherboard?

Also what kind of temps should I expect with stock speeds and stock voltage of 1.28? As I'm getting 70 degrees in some games even though my cpu has a h100i v2 to cool it and my gpu is also water cooled

Sounds a little bit warm for water cooled. This is why I always recommend air cooling to people...I have a 4670K that will do 4.5GHz stable and runs at 55-60C at 100% load. And that's cooled by a $25 Hyper 212 EVO.

Anyway... I'd try resetting the BIOS or clearing CMOS to begin with, just in case any settings got set to something weird.

Also, now that I think about it, if you have a 6700K the stock multiplier should be 42.... Their factory turbo boost setting is 4.2GHz. Try setting the multiplier to 43, leave voltage stock, and do a manual overclock (underclock) on RAM so it doesn't get set too fast.

 

[Georgehillier]

Elbert, any tips on manually overclocking ram? Have always used xmp settings for it before...

And iyzik, I've already reset to default and everything in bios. Although I was pretty sure stock multiplier is 40 as it doesn't take into account the turbo does it?

 

[iyzik]

Well, my CPU is 3.4GHz with 3.8GHz turbo boost from the factory, and my stock multiplier is definitely 38. Maybe it is done differently on the skylakes though, idk.

 

[elbert]

Elbert, any tips on manually overclocking ram? Have always used xmp settings for it before...

And iyzik, I've already reset to default and everything in bios. Although I was pretty sure stock multiplier is 40 as it doesn't take into account the turbo does it?

Yes but you need to see what works with just the cpu first. After work on the RAM. Only change one thing at a time. Leave off XMP until you get a good stable cpu overclock that you want.