djubre7

Nepton 280L, i7 5820k, idle temps 35-40° C and pump issues

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djubre7    0

Hey there people,

 

Since yesterday I have a following setup and some issues:

 

Case: NZXT H440

MB: X99 MSI SLI Plus

Memory: DDR4 Kingston HyperX Predator 2400MHz

CPU: i7 5820k

 

This MB's VRM heatsink is quite tall, and it's 8pin PSU jack on top edge. That PSU cable can get quite in the way of the fans, and the MB heatsink touches the fan blades on CM recommended setup. In addition, I had to do without the innermost fan thumbscrews as there is no space for them because of the heatsink itself.

 

What I did was attaching the radiator to the top of the case, the fans under it, but rotated them so they would pull the fresh air from the outside through the radiator. In this setup my idle temp sits between 35-40° C. That seems pretty high to me, as the CPU was not overclocked or anything. The supplied thermal paste was applied in less-than-pea-size quantity without spreading. I didn’t do any stress tests yet. Does anyone have any alternative besides attaching the radiator to the front of the case? It is not an option – I need the HDD brackets. The pump itself was not rotated, meaning the CM logo sits as it should, which made the water pipes curve a bit, but nothing out of the ordinary.

 

The other thing that I can’t find a solution for yet is that the pump suddenly lowered its RPMs to 0, and fans reved up to 100%. The temps started rising, restarting didn’t help, so I had to shut down the PC. After a few minutes, I started it again and everything went back to normal – Pump RPMs between 6800 – 6900, fans around 700-800 RPMs. The fans are connected to the CPU_Fan1 slot via included splitter, and the pump itself to the CPU_Fan2. In MSI Command center and BIOS both the pump and the fans were on Smart mode - aka CPU-Fan1 & CPU_Fan2 on Automatic).

 

I was reading somwhere around here about this issue, but there was no concrete answer or solution beside sending the unit back - it's a pain here in Serbia, so I would prefer some other suggestion.

 

Thank you in advance.

 

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ticutzaa    0

1. your case can have: front 2*140, 3*120, back 1*140, top 2*140, 3*120. So if you cannot use the front, back is out of question so only top remains.

2. your MB have 3 sys fan and 2 CPU PWM connectors. Try to change the fans to CPU FAN 2 and the pump on CPU FAN 1. Why, because in my case for example Nepton 240 m I use the fans in CPU_OPT fan and the pump in CPU_FAN so I think that my OPT fan is like your CPU FAN 2. If by any chance you still have issues, use your pump with an molex directly into the PSU unit.

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djubre7    0

Well, yeah, I know that only the top remains, and only possible setup with this MB is like mine - pull fresh air from the outside through the radiator. Exhaust - blades are hitting the MB heatsink. Push - the radiator is too thick to enter the space between the fans and the MB.

 

With this setup the cooling efficiency is quite reduced, and I think that's the reason for the high temps. So, I either order 5 Noctuas 14cm IndustrialPPC 3000 (back, 2x Nepton, 2x front) to increase the airflow and noise probably, or I settle with this as is, which I don't really want...

 

As for the pump, I haven't experienced the same thing again. I reconnected the 2 JetFlows to CPUFan_1 and CPUFan_2 and the pump to SYSFan_1, and this seems to work OK. Under load both fans and pump increase their RPM's so it looks fine. The sound sometimes drives me crazy - I don't know if it's because I haven't got used to the sound of the AIOs as this is my first one, but it sounds something like a hard-drive, or very fast rotating brush sounds, or... I can't explain, it's barely audible, but it's very unnerving subconciensly....

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ticutzaa    0

I am afraid that pulling fresh air THROUGH your radiator will be an pain for your AIO, the radiator have no chance to be cooled, only the simple air circulation through him will not be enough when you will do anything else except staying idle. That is why mate I don't think that buying more case fans will help since the hot air from inside your system is not guilty for the Nepton poor cooling, no matter how many case fan you will have I bet that the results will be the same.

You could try something else, I saw that stupid vram heatsink is so big, but you may could use only one or two fans instead? One in the left side at least in normal position as exhaust? Even one should be way better than those 2 pulling air from outside through the radiator...

 

about noise. I did not checked the 280l but the 240m is an beauty and an beast in the same time. Though, since the moment I bough him I noticed an noise into my system, an new noise barely audible but is there. But in the same time I bought my number 3 hdd WD black and since these are very silent I blamed them for an while. After 3 weeks I gave up and I dismantled my whole pc trying to understand what the :) is doing that noise. The noise is like an vibration for 2 sec, silence for 2 seconds so at one moment will became very frustrating. I removed my dvd-rw and took my hdd-s from bottom cage (I have an CM III 690) and placed them into the 3.5 inch bay using elastics. The noise from vibrations was gone but after some time I realized that the noise is still there but not so loud. It was the Silencio FP120 fans who make the noise and this Is happening around 18-22% fan speed, as I checked with easy tune. Now I let them to 16% up until 40°C and after that 50% at 50°C which make the AIO dead silent in idle/movies/browsing and in games the windforce 770 gtx is making way more noise than the silencio fans.

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djubre7    0

I'm afraid you're right. But what do you think about this - as the Nepton 280L has mounting holes for 120mm fans as well, maybe put the 120mm industrial Noctuas as push-exhaust? Then I can use the Jetflo's in the front of the case as intake... Would that be a better combo? I wouldn't use the supplied NZXT as push fans, as the 120 FN v2's static pressure is around 45 cfm..

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ticutzaa    0

the Noctua FN-F12 Industrial PPC 3000 PWM 120 mm cooling fans can reach 750-3000 rpm, at max speed having an airflow of ~ 190 m^3 at an static pressure of 7,63 mm H2O and ~ 44 db(A). I saw some of them running and I was scared about the noise they can do at maximum speed. We are talking about 3000 rpm which is insane. Also being very close to the radiator at this pressure the noise will be even louder ... This can be an better combo indeed but I don't know what to say about the noise...

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djubre7    0

OK, I'm getting pretty frustrated with the situation. I cut the clips from the 8-Pin PSU-MB cable, so I managed to turn the fans around to push hot air out - as recommended by CM and everyone else. Fan control works, pump control works. During Prime95 15 min stress test, the temps barely touched 63° C (with the fans going 100%). On idle, temps stayed the same - 37° C average. Fans are doing around 1190-1200 RPMs.

 

Can somebody please explain what the f.. did I miss?

 

Thank you in advance.

 

BTW, I managed to attach my old Noctua NF-P12 on my HDD brackets to forward some air over my Graphic card, and I got a couple degrees lower temps, so at least I got that working for me, which is nice (insert Bill Murray meme here).

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djubre7    0

Sorry for double posting, just wanted to update this topic.

 

So, after a lot of fiddling around, I finally made some progress. Although the H440 is a great case, the airflow sucks - a no no for Nepton 280L . So, with that in mind, I turned the back fan from exhaust to intake, using also a 140 mm air filter. The results on idle are around 30-33° C which is a tremendous difference. Without the air filter, it would probably be more. So this setup is like this:

 

- Front: 3x NZXT FN120 v2 (stock) (intake)

- Top: 2x CM JetFlo 140 Nepton 280L fans (stock) (exhaust)

- HDD Bay: Noctua NF-P12 blowing cold air all over graphic card (Sapphire 6870) out the openings in the lower back

- Back: 1x NZXT FN140 v2 (stock) (intake)

 

With this setup, the back intake feeds the 280L much needed cold air, which brought the temps down by almost 8° C. A drawback is that all this air mixing produces a bit of a strange noise - like an air raid far away, lol... So I still have to work on this, but at least I know in which direction to take it.

 

So, any further suggestions? Putting some other fans, slowing these down...

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