High Perf Cooler but overheating CPU

[hotcoolfool11]

Hello everyone,

 

Firstly my PC Specs

Skylake i7-6700K @ 4.0Mhz 8MB Cache
CPU COOLER: Corsair H115i, Water Cooling, with 2x 140mm SP140L Fans

MOBO: MSI Z170A GAMING M5

RAM: Kingston HyperX Fury 16GB DDR4 @ 2133Mhz
GPU: MSI GTX 1080 SeaHawk X Liquid Cooler by Corsair
SSD: Samsung 960 EVO 250GB

1st HDD: 1TB Western Digital Caviar Blue

2nd HDD: 1TB Westren Digital Caviar Green
PSU: EVGA Supernova G2 650W 80 Gold+
CASE: Corsair 760T Black with 2 AF140's Corsair Red LED fans(Front), 1 Corsair AF120 Performance(Bottom), 1 Corsair AF140L(Rear) and my Liquid Cooler mounted at the top of my case with 2 Corsair SP140's.

 

Now the problem is that my CPU keeps overheating. I have a few questions.

1. Hits ~75 degrees on full load(Stock), is that normal with a cooler like mine? at Full fan speed and pump speed.

On the Corsair LINK application, my radiator only hits ~43 degrees at max cpu load while my cpu is at ~75.

My temps idle on ~35 degrees but if I start a CPU intensive app, it instantly jumps to ~65 until it reaches a max of ~75.

 

2. Could it be the pump? or what? The pump is 2 years old.

 

3. Could it be my thermal paste? I applied Deep Cools' Z5 which only has a Thermal Conductivity of >1.46 W/m-K. More about the thermal paste here: http://www.deepcool.com/product/dcoolingaccessory/accessory/2013-12/48_653.shtml

I have reapplied my thermal paste a lot of times with the Z5 and made sure its evenly spread.

 

As I remembered I could always overclock and it would not even go above ~60 degrees, now i cant even overclock and it hits ~75 degrees.

I've come to the conclusion that its my thermal paste which is the problem. But do you guys think it is?

 

Thanks

[VK707]

Could be thermal paste,

could be not properly seated,

could be a clogged radiator,

could be a faulty pump

 

hard to properly diagnose ^^;

[For Science!]

Sounds pretty normal for a non-delidded skylake to me? 75 is not overheating.

[hotcoolfool11]

13 minutes ago, For Science! said:

Sounds pretty normal for a non-delidded skylake to me? 75 is not overheating.

But the thing is that i always overclocked it to 4.6ghz and was at ~60, but now at stock its at ~75.