Case/cpu fan speeds

[L.o.D.]

So I am wondering about fan speeds.
I have a Fractal Torrent case with the 2 large front intake fans along with the 2 slightly smaller bottom intake fans. The cpu has a black Noctua NH D-15 cooler.
I am wondering if these fans should be run around the same RPMs to force all the heat out the back? My 7800X3D at idle isa around mid 40s to low 50s. Ambient is 25cel in my apartment. GPU temp is about 35cel with it's fans running and the bottom fans blowing on it.

Should at least the front fans be the same speed as the cpu fan to keep the airflow smooth?

[Monk]

It won't be as the fans are different sizes and profiles nit to mention things in the way, just set them to an audible level you can live with thst stops the components from throttling, beyond that, it is not that serious.

If it was, you'd have something as overkill as I do lol

[smokerob79]

7800x3d is the last of the vertical stack of cache memory on the CPU die.....real world its always going to idle i high temps....

you could try running the fans up to see if temps get better.....

[L.o.D.]

Originally posted by Monk:

If it was, you'd have something as overkill as I do lol

Show me.

Originally posted by smokerob79:

7800x3d is the last of the vertical stack of cache memory on the CPU die.....real world its always going to idle i high temps....

you could try running the fans up to see if temps get better.....

ATM, I'm just using Asrock's A-tuning app for fan control along with it's Fan-tastic tuning, but do also have Fan Control running to monitor speeds.

[Monk]

Originally posted by L.o.D.:

Originally posted by Monk:

If it was, you'd have something as overkill as I do lol

Show me.

Originally posted by smokerob79:

7800x3d is the last of the vertical stack of cache memory on the CPU die.....real world its always going to idle i high temps....

you could try running the fans up to see if temps get better.....

ATM, I'm just using Asrock's A-tuning app for fan control along with it's Fan-tastic tuning, but do also have Fan Control running to monitor speeds.

Check profile.

[L.o.D.]

Originally posted by Monk:

Check profile.

Lots of experimenting I see. LOL.
I have only done water cooling once and that was with the Q6600. I used Swiftech for the pump, res and rad. The waterblock was a D-Tek Fusion.The pump was stated to last 5yrs, this one lasted 10. I still have all the parts.
I have debated on doing WC for the 7800x3d, but I went with the Noctua instead, although that sucker is huge.

[Monk]

As I said, overkill and not really needed for 99% of people :)

It is in pieces currently being upgraded, though the only cooling change is upgraded ram blocks to iceman direct die ones and direct die on the cpu as there is a die guard for it, though I need to modify the cpu block slightly due to a shunt sitting about 2 microns too high (dangit!).

[smokerob79]

go in to the fan controller and set all to 100%.....then run PRIME 95 to see what the worst case is as prime will kick your CPU in the balls and heat it up you can see what the fans at 100% will do VS your CPU at the most demanding load it will ever see.....

then start playing with your fan curve until you have temps you can deal with with fans that are not crazy load.....this will be your balance you must find

[_I_]

prime95 small fft is an unrealistic load
but good to test max temps and combined with hwmonitor, will show if any cores will possibly throttle

if its throttling and at 90+c, it needs better cpu cooling and/or case airflow
if the cpu is <80c and throttling, the boards vrm mosfets are unable to give the cpu the power it needs and the board is forcing it to throttle

in bios, set cpu fans to 0% at 40-60c, and to 100% at 90c
and case fans to 20-40% (whatever is quiet with some flow) at 70c to 100% at 90c

[L.o.D.]

Originally posted by _I_:

in bios, set cpu fans to 0% at 40-60c, and to 100% at 90c
and case fans to 20-40% (whatever is quiet with some flow) at 70c to 100% at 90c

In bios, I have it set to performance mode, which doesn't seem to be any different than silent mode.
Would the ASrock A-Tuning app conflict with the bios settings? I ran it's fan test for each fan and set it to what it suggested.
Top front case fan is about 70% whereas the front bottom fan is about 29%.
Both bottom case fans are at about 29%.

[_I_]

the software should override bios, until the software is closed

bios is reading the temps directly and will respond faster,
if the software or windows crashes or whatever and the speeds may not change

you can use the software to find setting and tweak, then apply them in bios

[L.o.D.]

Originally posted by _I_:

the software should override bios, until the software is closed

bios is reading the temps directly and will respond faster,
if the software or windows crashes or whatever and the speeds may not change

you can use the software to find setting and tweak, then apply them in bios

I find it kinda odd that it would set the front 2 fans at different speeds instead of matching them.

So the bios says the cpu temp is holding steady at 43cel, whereas the A-tuning app says it's anywhere from 46 to 52cel.
Why would one be steady whereas the other is jumping around?

[_I_]

in bios the cpu is not doing much
windows adds some load, temps will be higher

but idle temps are pretty much meaningless

[wing0zero]

Originally posted by Monk:

just set them to an audible level you can live with

Yeah that's just the way I do it too.

Originally posted by L.o.D.:

I have a Fractal Torrent case with the 2 large front intake fans along with the 2 slightly smaller bottom intake fans. The cpu has a black Noctua NH D-15 cooler.

Noctua use the Fractal North XL for there fan guide with a their cooler, Noctua favour positive pressure as do I.

https://steamcommunity.com/sharedfiles/filedetails/?id=3489243844

[WarBucks]

When it comes to software fan control. the software named plainly "Fan Control" is far and away the best thing i have used. Case fans, CPU fans and EVGA hybrid AIO kit on my 2080ti. I have it taking care of all of it

[Electric Cupcake]

As long as there's clearance around the fans, it doesn't really matter whether the intake is at the front or back, so long as it's lower and opposite the output.

While different fan sizes can cause uneven airflow, it's not likely to cause any measurable problems beyond maybe having more dust settling in the case if the output is higher than the intake and negative pressure pulls in air from the sides.

Just set the bios fan curve and it should be fine.