Issues with new build and EK a240g loop

[Reznor]

Hi,

Finally put my old i5 sandybridge system out to pasture upgraded to some RGB goodness. But i've had some issues along the way and wondered if someone could help

Specs

Gigabyte Z370 Gaming 7

I7 8700k

16gb Trident Z 3200 cl16

Inno3d 1080ti

EK A240g

Antec 850w semi modular PSU

Fractal Design R6

First weird thing i've had is GPU temperature spikes, would often rocket up to 90 degrees, the backplate would be red hot to touch. I though this might be due to air trapped but i finally tracked it down to having hwmonitor and msi afterburner open at the same time. If i don't touch hwmonitor the card performs perfectly and sits at 51 degrees. Has anyone else experienced this weirdness?

Secondly and the main reason im here is CPU temps, if I select multi core enhancement my CPU temps hit around 95 and some cores increase to 100, Prime will eventually crash after 5 minutes or so. When selecting CPU upgrade to 5ghz, prime crashes the very second it starts. After some investigation i've noticed i setup the cpu block incorrectly with the inlet/outlet ports(first time building a semi custom loop but so much fun!).

Would this misconfiguration cause such high temperatures?

Also the board seems to auto set voltage to 1.4v, but droops like a boss down to 1.3ish under load. I've tried setting 1.3v in bios with extreme LLC, i get very little droop but temps are still insane. I've also tried reseating the cpu block with no luck.

Prime screenshot

Thanks for your time and help in advance

 

[LuckyBenski]

What version of Prime are you using? Anything over 26.6 will excessively heat up the CPU due to using AVX instructions. It's usually considered best to use 26.6.

Depending on the CPU block, some are more specialised for directional flow so yes that could be an issue.

To get over 4.7/4.8GHz on an 8700k most people would suggest delidding. 1.4V is pretty scarily high, even for that clock speed. Do you think the instability is temperature related or otherwise?

 

[Reznor]

Thanks for your reply Yea I'm using the latest version of prime, wanted the worst case scenario. I'll try with a older version of prime tonight and see what a more realistic load gives temperature wise.

I'm thinking it's unstable due to temp but I could be wrong, don't want to try much more voltage due to the temps.

Think I will buy a delid tool on payday and see how much that helps. Any recommendation with either thermal grizzly over cool laboratory LM?

Finally what's the best way to drain a loop like the a240 kits, pop the lid off the Res or just take one of the tubes off going into it?

 

[LuckyBenski]

Depending on your layout I'd say probably the reservoir fittings are the easiest place to break the loop. You'll need two openings so air can come in to replace the water, so opening the reservoir won't work on its own. You could unmount the res and hold it over a bowl, then pop the tubing off one fitting. It's worth having a dedicated drain method like a T-fitting or quick release connectors.

It seems to me that Liquid Ultra was around earlier but isn't as advanced. I've heard stories of it drying out, whereas Conductonaut doesn't seem to. They're both pretty reactive with aluminium so there's no advantage to either there. I think the Thermal Grizzly has become the go-to choice, and I found it easy enough to work with

You could test the system with fans and pump at full speed constantly, to try and isolate temperature issues, if you haven't?