Question about Fan hub.

[Urbwolf]

I have all 7 case fans and my Cool master H92 cpu cooler. My question is does the PWM HUB adjust the other fans on what is needed by the cpu for cooling? Are they constant 100% speed or are they running at w/e speed my cpu fan is. My motherboard has 4 fan headers plus the cpu_fan and cpu_opt headers. Should i use these headers and just use the hub for the extra fans or does the Hub take care of the adjustments on whats needed for cooling? I would like to keep a good air flow through the case for GC cooling to. The hub says to plug into the CPU_fan header. If i use the headers for fans and the cpu cooler to the cpu_fan header do i plug the hub into the cpu_opt header? Im looking to OC but i dont know if i should with all the fans through the hub so I'm looking for suggestions on the best way to keep my system cool under loads with still being able to OC.

http://www.legitreviews.com/wp-content/uploads/2015/04/N450-case-white-fan-hub.jpg

 

[Layback Bear]

Does you fan hub get it's power directly from the power supply?
Therefore it just uses the PWM signal to control the fan speed.

I have a lot of fans and I run them all at 100% (see My System Specs) using these.

NZXT Grid Ten Port Fan Hub - Newegg.com

I personally don't want the motherboard supplying the power to 14 fans and 2 water pumps. That is a lot of amp draw.

As long as you system runs cool using the motherboard PWM fan speeds and the power supply is the fan hubs power source you should not have a problem.

Keep in mind that if you run a lot of fans 100% all the time you must have quiet fans or it will be very loud.

 

[Urbwolf]

Yea the psu supplies the power to the hub and hub connects to the cpu_fan header and my cpu cooler connects to the only 4pin header on the hub, rest are 3 pin. I dont think they run at 100% all the time connected to the hub but im not sure cant find any specs on the hub. I replaced all the stock fans with COUGAR CF-V12HP Vortex Hydro-Dynamic-Bearing (Fluid) 300,000 Hours 12CM Silent Cooling Fan with Pulse Width Modulation - Newegg.com This is the hub http://www.legitreviews.com/wp-conte...te-fan-hub.jpg I cant seem to find any specs on the hub.. So with all the fans to the hub i don't have to worry about cooling when overclocking or cooling for my gtx 980 ti?

 

[Layback Bear]

It appears that because only the PWM is the only connections to the motherboard to the fan hub the motherboard is only used to control fan speed, which is good. Will it keep your system cool; well you are the only one who will know by monitoring your temps. Again only your ears will know if those fans are load. I have never used them. If you really want to control various fans speeds a fan controller would serve that need.

Their are many option when it comes to fans, air flow, speeds and mounting. It will always come down to trial, error and mounting. Then monitoring the temps to see what works best for the needs on that computer. Their is no one answer. The way I run my fans will not meet the needs of every computer and pair of ears.
Try the PWM of all fans first and see if it meets your needs and ears. Just make sure you hook things up just like the instruction indicate.

 

[Urbwolf]

Thanks for the help, Maybe you can help me with one last question regarding fan setup. I have 7 case fans on the NXZT n450 all 120mm 3 in the front 3 on top and 1 in back, Currently i have the 3 front as well as the first fan closest to the front on top as intakes and then i have the 2 other top fans along with the back fan as exhaust. I also have a Vantec Spectrum pci fan blowing up from the bottom into the graphics card and to push stagnant air from the bottom up towards the exhaust fans. Is this the best set up for cooling in this particular case or should i make all 3 top fans exhaust?
http://media.bestofmicro.com/S/N/493511/gallery/N450-case-white-frontfans_w_300.jpg Shows 3 front and back fan. Room for 3 on top.

 

[ignatzatsonic]

Is this the best set up for cooling in this particular case or should i make all 3 top fans exhaust?

There's no way in the world to answer that without trial and error experimentation and you are the only one who can do that.

You've got 7 fans, each of which can be intake or exhaust, so you've got a lot of work in front of you assuming your goal is the lowest possible temperatures with no regard for noise level.

Let alone all the possible variations in fan control via PWM and BIOS settings.

 

[Urbwolf]

Well with the set up through the hub with all the fans. i'm currently running my I7 4770k 3.5ghz at 4.5ghz and im sitting at a idle temp of 32c with a high of 88c running prime95 so Im thinking this should be sufficient cooling for my needs.

 

[Layback Bear]

Trial and error as stated is the only way of knowing.
I would have all top fans as exhaust and all intake fans filtered.

For the bottom fan if you can with your case I would put a case filtered intake 120/140 fan to blow fresh air on the video card.

Here is my basic rule of the thumb when it comes to air flow and cooling for a case.

1. All intake fans filtered to slow down dust bunnies.
2. More intake fan air than exhaust fan air flow to keep a positive pressure in the case.
3. Block all holes that don't have a fan or hardware in them. That will help in directing the direction of air flow.

I have 8 filtered intake fans (bottom, front, side) and 6 exhaust fans at the top of the case. They are all 120 or 140mm fans. Every air exit point other than where there are fans are located are covered including the 5 1/4 bays not in use.

That way the incoming air has no place to go except through the case and out through the radiator and 6 fans at the top. That keep a positive pressure in the case and some control over the air flow through the case.
On my case I removed the hard drive bays because I don't use them and they were blocking the front intake fan air flow. The back fan is intake with air flow directed to the ram and the capacitors on the top of the motherboard. One side panel fan directs air flow to the back of the motherboard and the other to the reservoir. My goal was not to have hot spots in the case where the air doesn't flow.

All done by a little thinking and trial and error to get great case temps which leads to cool CPU and GPU.
It's really not hard to do but it does take some time and thinking.

No I'm not crazy. Some probably think so.

Just like a race car. You try to direct the air flow under, over and around the race car.
You try to direct the air flow into and out of various radiators. You also have to direct the air flow to cool the brakes. It's not done by accident, it's planned, studied and tried several times to get the best results.

I think my keyboard is running out of ink.

 

[Layback Bear]

Although 88C running Prime95 is not to bad to me it's to high. If it was me I would try different things to try and lower the cpu temps.

Your specs for the cpu.
TCASE 72.72°C

What is you Vcore for the cpu?

Idle temps mean very little. You should also take into consideration the ambient temps when reading cpu temps.

 

[ignatzatsonic]

Well with the set up through the hub with all the fans. i'm currently running my I7 4770k 3.5ghz at 4.5ghz and im sitting at a idle temp of 32c with a high of 88c running prime95 so Im thinking this should be sufficient cooling for my needs.

Are you using Prime 95 version 28.5 or higher?

Or an earlier version?

28.5 includes some AVX instructions that are said to put a high and unrealistic stress on the CPU. Earlier versions don't have those instructions and should result in lower temps.

Most say that Prime 95 itself is not indicative of real-world temps, but is useful as a benchmark only.

If you want to get an idea of real world stress temps, try Intel Extreme Tuning Utility or OCCT. They'll be noticeably below Prime 95 temps.

Is that cooler an H92?? I can't find details on it.

Or is it this:

Coolermaster Hyper D92 Heatsink Review - FrostyTech.com

 

[Urbwolf]

What is you Vcore for the cpu?

1.73 v

Are you using Prime 95 version 28.5 or higher?

yes it is 28.5 doing small FFT's (maximum heat, FPU stress, datta fits in L2 cache) Test

Is that cooler an H92?? I can't find details on it.

Yes it is the Coolermaster Hyper D92 Heatsink Review - FrostyTech.com

 

[Layback Bear]

1.25 volt should be okay.

 

[Urbwolf]

1.25 volt should be okay.

I fixed it occt shows 1.74 but asus shows oc voltage as 1.25v but during stress test asus shows 1.328 v

 

[Layback Bear]

Check you vcore with cpu-z and bios.

Download CPU-Z - MajorGeeks

1.74volts is scary.

Did you set your vcore manually? If so what did you set it at?
I always set the voltage manually and verify it stays there.

 

[Urbwolf]

cpu z is showing 1.25 v when i run the occt test on med or high it shuts off because cpu is hitting 90c i have everything on it set to default

 

[Layback Bear]

I would NOT use OCCT. Your system will not live with voltages possibly be driven that high.
If it was my computer I would set the vcore manually to 1.25v and test again with Prime95 while monitoring the temps. Every system is different. You have to balance out the over clock with voltages and temps. A couple of tenths of voltage increase can raise temps very high. My system runs quite well with 1.3 volts @ 4.6 but I have a lot of cooling.



I use Real Temp to monitor my temps because it's always close to temps in bios.

3.70 works well for me.

Download Real Temp 3.70 | techPowerUp

 

[Layback Bear]

You have this thread marked as Solved. You might want to open it back up so others will chime in with help. (Unsolved)

 

[Urbwolf]

I would NOT use OCCT. Your system will not live with voltages possibly be driven that high.
If it was my computer I would set the vcore manually to 1.25v and test again with Prime95 while monitoring the temps. Every system is different. You have to balance out the over clock with voltages and temps. A couple of tenths of voltage increase can raise temps very high. My system runs quite well with 1.3 volts @ 4.6 but I have a lot of cooling.



I use Real Temp to monitor my temps because it's always close to temps in bios.

3.70 works well for me.

Download Real Temp 3.70 | techPowerUp

I tested again at 1.25 manually setting voltage. getting 4.3 GHz and high temp of 83 on prime95

 

[Layback Bear]

At that temp and volts I would improve the cooling or lower the over clock.

If I had to work on your system I would try a better cpu cooler when I could and until I could I would not run a over clock. I and others have good luck with a AIO water cooling like Corsair. I use a Corsair H-80 with Noctua fans on another system over clocked (@4.2/1.28 vcore and never see temps that high using Prime95.
It's a i7-960 which are little toasters.

They are not a lot of money like a full blown water cooling but do a very good job for the dollars spent. Your D92 I have never heard of or do I remember anybody else using one.
Noctua 14 or 15 are high quality air coolers and have been top of the line for air cooling for years.

A good rule is don't over clock anything you can't afford to replace.