Case fans running at low RPM

Aceman.au · Dec 9, 2012

I've recently put 3 brand new LED fans into my case to draw heat out of it. 2 7970s playing stress games have been generating a lot of heat. Anyway, I've put my hand to them to see if they are working properly and I couldn't really feel any draft being created by them. And I wasn't suprised when opening Speedfan to find 2 fans running @ 600 RPM (almost 700). Could it be a lack of power or some bios setting?

2 fans I think are running at low RPMs

CoolerMaster MegaFlow 200 Red (on the top of my HAF X case)

Image for your veiwing pleasure

http://imgur.com/Sqe2W

On a side not... My graphics card can not fit in the top slot due to the CPU cooler being too large... Will this be an issue?

newtekie1 · Dec 9, 2012

http://www.coolermaster.com/product.php?product_id=6474

Speed (R.P.M.) 700 RPM

That is just the speed the fan is supposed to run at, there is no getting it to run faster. It isn't designed to move a lot of air, it is designed to be quiet. Though being a 200mm fan it actually will move a decent amount of air at that low of an RPM, it just wasn't have a lot of pressure behind it, which is why you can't really feel the air moving.

Aceman.au · Dec 9, 2012

Oh wow Im a dumb s***...

Jesus

Miguel2013 · Dec 12, 2012

newtekie1 said:
Speed (R.P.M.) 700 RPM

how much noise would a 7200rpm fan run if its size is 200mm

Bo$$ · Dec 12, 2012

Think about the Blade tip speed with that sort of diameter, trust me that thing will move some SERIOUS air... they are rated for 110CFM so better than most 12cm fans

badjoe · Dec 21, 2012

Ubuntusario said:
how much noise would a 7200rpm fan run if its size is 200mm

will be sounds like he*l.....instead of noisy at full speed, bet your case would shaken by it's vibration... :laugh:

Hellraiser1981 · Dec 21, 2012

Ubuntusario said:
how much noise would a 7200rpm fan run if its size is 200mm

I think Delta needs to release one :eek:

xxdozer322 · Dec 21, 2012

maybe positive pressure might help? my two top fans are sucking in air, my side fan is sucking in air, and my front fan is sucking in air, my back fan is pushing everything out and my card used to hit 96c, now with the positive pressure the highest ive seen my card go was 81c

RejZoR · Dec 21, 2012

newtekie1 said:
http://www.coolermaster.com/product.php?product_id=6474

Speed (R.P.M.) 700 RPM

That is just the speed the fan is supposed to run at, there is no getting it to run faster. It isn't designed to move a lot of air, it is designed to be quiet. Though being a 200mm fan it actually will move a decent amount of air at that low of an RPM, it just wasn't have a lot of pressure behind it, which is why you can't really feel the air moving.

Actually there is. More than 12V and it will spin faster

Fan overclocking.

As for the lack of the draft feel, when air is cold, you'll feel it easily. But when 2x graphic cards and CPU pump up the heat, the exhausted air will temperature close to your body temperature and you wont actually feel it even though it will be there.

I know this from experience with my own case and fans.

Hellraiser1981 · Dec 21, 2012

RejZoR said:
Actually there is. More than 12V and it will spin faster Fan overclocking.

As for the lack of the draft feel, when air is cold, you'll feel it easily. But when 2x graphic cards and CPU pump up the heat, the exhausted air will temperature close to your body temperature and you wont actually feel it even though it will be there.

I know this from experience with my own case and fans.

True, 15 v or so would increase the RPM of the fans. A boost mode pwm would be kind of impractical for homebrew, but possible. Also since the fan is larger you will feel less temp difference per cm^3 if the temp is close to body temp.

System Name	Toaster!
Processor	Intel Core i7 10700KF @ 3.8/5.1GHZ
Motherboard	ASUS Prime Z490-P Motherboard
Cooling	Noctua NH-D15 CPU cooler.
Memory	G.Skill Trident Z RGB 64GB (4x16GB) 3600MHz CL16 DDR4
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Display(s)	Asus ROG PG43UQ 4K UHD 144Hz G-Sync HDR 43in + 2 x ASUS VG258Q FHD 144Hz Freesync 25in Monitor
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System Name	Toaster!
Processor	Intel Core i7 10700KF @ 3.8/5.1GHZ
Motherboard	ASUS Prime Z490-P Motherboard
Cooling	Noctua NH-D15 CPU cooler.
Memory	G.Skill Trident Z RGB 64GB (4x16GB) 3600MHz CL16 DDR4
Video Card(s)	ASUS ROG Strix GeForce RTX 3090 OC 24GB
Storage	Samsung 970 PRO M.2 NVMe SSD 1TB
Display(s)	Asus ROG PG43UQ 4K UHD 144Hz G-Sync HDR 43in + 2 x ASUS VG258Q FHD 144Hz Freesync 25in Monitor
Case	Corsair Obsidian 900D
Audio Device(s)	EPOS Sennheiser GSX 1000 V2 amplifier + EPOS Gaming GSP 601 Headset
Power Supply	Corsair AX1000 Titanium Modular
Mouse	Razer Deathadder
Keyboard	Corsair K70.
Software	ALL HAIL WINDOWS 10.
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System Name	Asrock 2012
Processor	AMD Phenom II X4 965 Black Edition Deneb 3.4GHz
Motherboard	ASRock 970 PRO3 AM3
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Power Supply	CORSAIR RM850X
Mouse	wired chinese gaming mouse
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Software	Windows 10 64bit
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Case fans running at low RPM

Aceman.au

newtekie1

Semi-Retired Folder

Aceman.au

Miguel2013

Bo$$

Lab Extraordinaire

badjoe

Hellraiser1981

xxdozer322

RejZoR

Hellraiser1981

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