cpu temp raised after changing my mobo

[mmdup93]

hello, first of all sorry for my crappy english.

i recently bought an asus tuf z270 mark1 (was able to get it for 150usd) as a
replace for my older msi b150 gaming m3. i'm running a 6700k @ stock, no OC
(planning to upgrade to the 7700k in the future since i don't have the money to buy
a whole new 8th gen system), on a corsair h100i gtx. when i had the b150 chipset +
6700k, my cpu temps never went over 68 degrees under heavy load (i render a lot),
but now with the new z270 chipset, my cpu temps are as high as 88 degrees.

i reapplied thermal paste twice (cleaning the first attempt of course), i removed
both chasis side panels for maximum airflow, i ran all fans at full speed (ignoring
the huge noise output) and yet i was getting temps in the high 80s. the z270 mark1
doesn't seem to have any issues so far, everything runs normally, no chrashes, no
reboots o blue screens.

cpu idles @ 30-40 degrees, gpu idles @ 35-40 degrees, other temps fluctuate from 30
to 45, which is pretty normal since in cuba ambient temps go from 25 to 32 degrees.
i check temps with asus thermal radar and aida64. i know a thing or two about PCs but not too much though...

i did no reinstall windows after switching boards, but i will, once i get the latest version of win10, i'm running a 2016 version (internet access in my country is VERY limited, so software support
ain't an option). also, it makes no difference in temps whether i activate in the
bios intel's XMP or not.

my question is, is this temp raise normal? am i doing something wrong? am i missing
anything?

thank you all in advance

my system:
i7 6700k @ stock
corsair h100i gtx
asus tuf z270 mark 1
16gb corsair vengeance led @ 3200
saphire r9 390 8gb
7 generic 120mm cooler master fans @ 1000rpm
1 noctua 40mm fan for the mobo
evga 850p2 psu
2 sata hdd and 1 sata ssd
cheap chinese case with plenty of space inside

 

[LORDPrometheus]

What are you using to check the core temperature? is the board reporting it or the cpu package itself? I find it hard to believe that you would be getting a temperature jump that high due to a motherboard swap if there was no massive change to the clock on the CPU. I would download HWMonitor if possible and see what it says the temperature on the CPU is from both the motherboards point of view and the CPU package itself. it is possible the new motherboard is misreading it. Another possibility is that there is something wrong with the cooling mount with the new motherboard. a simple test is to see if gently pushing the water block towards the motherboard helps.

The other possibility is that you have the pump fan 4 pin connector plugged into a case fan header on the motherboard and not a CPU fan header. this will interfere with the pump operation.

finally it is possible corsair link is set up improperly and not running the pump at the proper speed

 

[mmdup93]

i check the temps with aida64 and asus's own thermal radar 2 that comes with the board cd. i have the pump connected to the "pump header" on the mobo, though i only get the pump's readings via corsair link (full speed), the mobo says the pump is off (?). the radiator fans are connected to a single cpu header with a splitter. i'll try to "gently pushing the water block towards the motherboard" and see what happens, though i reinstalled it several times when i first saw the readings.
downloading hwmonitor is going to be an odyssey with my internet speed limited @ 20kbps but i'll try that too.
i hope it's just a misreading problem since it meakes no sense to me that the cpu heats that much only by changing the mobo and nothing else, but i decided to ask here for better opinions, thx

 

[mmdup93]

so I tried to gently ush the water block towards the mobo and nothing changed so I gess it's well installed, and I was able to downlaod HWMonitor, still getting high temps.
I searched some info here in the forums and I think the problem might be related to voltage config. Turns out the asus's Auto configuration on bios sets my cpu voltage to 1.25v and sometimes pikes to 1.35v (thats the reading I get from the bios and HWMonitor). BTW HWMonitor was showing 90-92 degrees on cpu cores, which is even higher than the readings of asus's own Thermal Radar (85-88).
I read that normal voltage for the i7 6700k should be 1.200v, I set voltage control to Adaptive and voltage went down to 1.136v. System booted normaly, no chrashes after several minutes of stress load, no performance drop, and temps lowered to the high 60s where they always were with the older b150 chipset.

now my question is: did I do well by changing the voltage control to adaptive mode? should i switch it to manual mode and input the 1.200v myself? or should I leave it in auto and ignore the high temps?
I know nothing about overclock and I'm not planing to OC my chip, I just want it to work @ stock without getting fried, thus I ask the community for help