i7 7700k with custom EK water loop

[lukaszzyla]

Hi guys,
I am new to watercooling - just finished my first custom loop.
It consists of:
EK D5 PWM pump
HWLabs 280 GTS Xflow rad
EK se 140 thin new model rad mounted outside of the chassis.
z270g monoblock
GeForce 1080 block
110 ml res
FANS:
280 rad: 2x140 Noctua REDUX 1300 rpm
140 rad: 140 Cryorig 1300 rpm
all fans installed for PUSH
2 fans in front are Phanteks 140 and Phanteks 200 for pulling fresh air to the case.

My best BIOS config is:
CPU: OC to 4800
Adaptive voltage 1.200, negative offset of 0.35 - HWMonitor shows max voltage to be 1.200 so it works fine.
RAM: std 3200 cl15 OCed to 3466 cl15
SA: 1.05
VCCIO: 1.00

Temps I am getting: (ambient room temps 23C)
Idle CPU: 28C
idle GPU: 28C
load CPU Realbench (highest - 63C)
load CPU XT (highest peak - 69C)

on standard factory settings (4500MHz) my voltages jump to 1.25 or even higher and the temps are more less the same, sometimes even higher with Realbench scores much lower.

Doesnt that feel way too much for WC?

PICTURES OF THE SYSTEM HERE

 

[mdd1963]

Large waterblocks with huge radiators and large reservoirs do have an advantage on conventional aircoolers, especially with the monster CPUs on X299 rigs, but, many run only about 2-3C cooler that the better air coolers on 7700K, or about what you are seeing...

For an apples-apples comparison, see what your temps are in blended Prime95....my 7700K (with a Noctua NH-D15) runs 59-60C in default blended P95 (ver. 28.10), 8 threads...;oddly enough, that's only about the same as a Battlefield 1/gaming induced temp. (Prime95/Blend is a reasonable workload, where as small FFTs is a huge CPU load, topping 76C within 2 min or so...unrealistic CPU heater, but, is a true worst case ever scenario, usually 15C warmer than Prime95 blended load, apparently)

 

[lumineZ]

I never ever go over 61C on my CPU.
Gaming I stay around 43 - 51C

 

[lukaszzyla]

I am not sure what to think now.
I downloaded FurMark and ran it for few minutes.
My gpu wouldn't exceed 40C
With the cpu though - I am not sure.
Downstepped the OC to 4700 as 4800 proved unstable with Prime95.
After several minutes of blended Prime95 I get CPU temps at 72C, starting from 60C when I start the program.
Removed the monoblock, cleaned and reaplied the thermal paste from EK - doesnt seem to make any difference.
What is wrong?!@

 

[lumineZ]

Its nothing wrong with your CPU.
Its just that the 7700k normaly runs hot without delid cause of the distance the IHS has to the CPU die + crappy thermal grease intel uses instead of solder...

Here is the long answer if you wanna read:
PS! pay attention to section 9 if you wanna skip ahead

http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html?_ga=2.8635957.1205101901.1500754556-529710141.1499996457

 

[lukaszzyla]

Its nothing wrong with your CPU.
Its just that the 7700k normaly runs hot without delid cause of the distance the IHS has to the CPU die + crappy thermal grease intel uses instead of solder...

Here is the long answer if you wanna read:
PS! pay attention to section 9 if you wanna skip ahead

http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html?_ga=2.8635957.1205101901.1500754556-529710141.1499996457

Thank you for your answer.
I could be happier with the results, although temps are a bit lower and more stable.
What still confuses me is that the warm air coming out of the top rad is not so warm - actually it feels quite cool, even when cpu reaches 75C.
Is this also expected?
When running blended prime, temps are somewhere between 62-65 but after 2 minutes they start to rise slowly. after 5 -6 mins I get 75-76C and they keep rising.
I think I got bit better results by tuning fans and pump's settings. I want the system to be as quiet as possible but also be able to deal with heavy load. now fans and pump hit 100% even before temps reach 50C.

 

[lumineZ]

Lets say you start your computer after it has been turned off for the night.

Now your watertemp is at the same temp as the room temp (DeltaT = 0 degree celcius)

Now you start Prime95 and let it run for 1 minute and lets just say the tempratures looks like this:
CPU temp: 50C
Room temp: 20C
Water temp: 25C

After one hour running Prime95 it now looks like this:

CPU temp: 65C
Room temp: 20C
Water temp: 40C

As you see its when the water starts to heat up your CPU temp goes up, but water takes time to heat up tho.
Your CPU could be at 100C and your water temp could be at room temp if it cant handle the CPU and you just started a stress test.


Take my system. I am using one 480mm rad with 8 fans in push / pull config. And they stay around 400ish RPM so it makes no sound what so ever, but still have more than enough cooling for a 7700k. This is one loop just for cooling the CPU and nothing else.

You want silent + cool cpu cooling... Go totaly overkill when it comes to rad surface.