Desperately need help with temps on OC 6700k machine

[Kn1ghtrider]

After many years of dissatisfaction with my temperatures and overclocking performance I recently decided to re-position my Corsair H100i v2 AIO radiator/fans as front intake, moving the existing intake fan to a top exhaust.

This act alone, although I suppose moving the pipes about a bit could have helped, had a dramatic impact giving me temps of low 20s idle and 60s under full load. 

 

I had been using adaptive voltage of 1.296 +, LLC level 5, everything else auto or unchanged. I have followed many guides previously and was using 1.35 for 4.5ghz for a long time although the temps were not brilliant, spiking from 30 to 60 under slight load and going above 90 under load. I have tried lowering clock speeds to 40 now and in the past but the difference in temperatures have still been excessive based on what I have seen is typical for such a configuration.

 

I then, regrettably decided to give XMP one last shot, enabling in the bios. As per many times previously since I upgraded from 8gb to 16gb of the same Corsair 3000 LPX memory, this resulted in an immediate temperature increase and after restart/resume from sleep I get code 00 on the mobo and need to press the CMOS reset button to get it to POST at all. I also tried the motherbaords MemOK button at this point which is supposed to tune the timings I believe, but this had no noticeable affect. Now, after loading my saved BIOS profile I am back to terrible temperatures, going over 100 under load and clock watchdog timeout BSODs during realbench which I have had before when I suspect the voltage was insufficient, although now that I have seen it running with only 1.296 as the turbo voltage I am dubious.

 

I do not understand why with the same of profile, going back to the stock RAM speed and applying settings that were working so well, albeit briefly, is giving such vastly worse performance.

 

I would really appreciate any advise as I have tried so many things to try get my machine running at a level I have now seen it is capable of.

 

Specs:

 

Intel 6700k

Corsair H100i v2 AIO water cooler now configured as front intake

ASUS ROG Maximus Ranger VIII, bios 3703

Fractal R5 with original front and rear exhausts

Corsair RM 850x PSU

Gigabyte 2060 OC Pro

Corsair CMK16GX4M2B3000C15 Vengeance LPX 16GB (2x8GB) DDR4 3000MHz C15 XMP 2.0 High Performance Desktop Memory Kit (running at 2133Mhz)

 

Most components were bought in 2016, except the graphics card and RAM (1 year old).

 

Attached are images showing Corsair link monitoring after a cold boot and after 10 minutes, which are just one illustration of the high temperatures with minimal load. 

[Tad Bittoomuch]

I could be wrong (*gasp* someone might be wrong on the internet!) but isn't 1.35V a bit high for an Intel CPU?  That, and you mentioned that your temperatures weren't exactly great for the looooooooooooooooooooooooong period of time you ran your 4.5GHz overclock.

 

I'm inclined to believe that you may have degraded your CPU due to the heat and voltage, and now it just can't deal with the same level of clockspeed as before.

Is your pump speed set to maximum 100% of the time?

 

Have you tried returning everything to stock settings?  If you haven't, I'd recommend that.  Perform some tests to be scientific.

Maybe leave the CPU at stock settings, and try enabling XMP.

Then, if your CPU temps are still terrible, maybe reinstall the CPU cooler with some new paste.  If your CPU isn't degraded, maybe the cooler isn't completely level and that could explain this:

15 hours ago, Kn1ghtrider said:

spiking from 30 to 60 under slight load and going above 90 under load

 

If you decide to do more tests, make sure you only change a single variable at a time.

I'm interested to find out what the problem is.

[Lagercat1]

try putting your cpu back to stock bc thats extreamly high temp, i mean i have 1.4v on my i3 oc and at most long load i get like 75c 

 

 

if that does not work re seat cooler or see of your aio is even working

[0x1e]

1.35v for 4.5ghz is really high for that cup.

My 2700k can do 4..6ghz with that voltage.

 

I would put everything to stock and see if the computer is stable on it's own. Then I would camp, then increase the multiplier small steps.

 

You can also try reseating the cooler  to make sure it's all good.

[Kn1ghtrider]

Thanks for the suggestions. I didn't heed the advice of changing one variable at a time, but through a combination of lowering the multiplier to 40, rebooting, nudging one of the two pipes on the cooler that didn't feel warm in comparison to the other which was warm, and then changing the multiplier back to 45 I have been able to resinstate the performance I had seen temporarily.

 

I am growing increasingly suspicious of the coolant flow but haven't ruled out reinstalling the cooler or replacing the paste being necessary.

 

I am unsure how to determine if the CPU has been degraded, it is quite possible with all the problems I have had, although with adaptive/balanced power saving it wouldn't have been getting 1.35 24x7 which hopefully helps my cause. My research suggested that keeping below 1.4v was the main priority the 6700k.

 

XMP seems to be very problematic with the RAM I have and after the impact of the last time I enabled it I plan to leave this off.

 

I am now set at 1.275v and under a brief test reached 66c under load and around 20 when idle which if it continues would be a great improvement.