Question Case fan (140mm) power consumption

[gunslinger11]

I bought a 140mm case fan from eBay. I received it today and could not wait to install it into the front panel as an intake fan. The seller said it is very fast so I paid $12 for it. It's quite noisy in my room but as I know I am expecting a fast fan so I can cut the deal.

But problems come now: I just ran Civilization 6 (DX12) it wouldn't start! However, the game ran fine with DX11. I suspect the problem comes from the new fan, so I disconnected it and ran Civ 6 (DX12) again, it ran as usual.

I sent an email to the seller and asked detail spec of the fan, he only said it maybe a 8,000 rpm fan and he knows nothing about how many Watts it uses. The label say nothing not even if it is made in China. But when it operates, it sounds like it is rotating very fast cause the noise quite noticeable.

Anyone knows how many Watts does a 8,000 rpm fan uses?

thanks for the reply in advance.

 

[Mr Evil]

8000 rpm is really, really fast for a fan that big! That's fast enough that passers-by will mistake your computer for an airport.

I just did a quick bit of googling* and couldn't find the specs of a 140mm fan that fast to give you an estimate, but consider that a Delta 8000rpm 92mm fan uses 37W. A 140mm fan will use substantially more than that.

Can you control the fan's speed? Turning it down will reduce its power consumption.

* I actually didn't use Google, but "googling" still feels like the right word to use.

 

[UsandThem]

That fan likely has to be powered by something besides a motherboard's standard fan header, just like the high RPM Delta fans. I would imagine it would consume way too much amperage, and would not work properly with a standard motherboard header (and could damage it). Most standard fan headers provide around 1 amp, although some have a special header that users can connect a pump to, and they can provide around 3 amps.

Why in the world would someone want some unknown brand 8000 RPM fan (unless they like the sound of a running vacuum cleaner)?

 

[gunslinger11]

8000 rpm is really, really fast for a fan that big! That's fast enough that passers-by will mistake your computer for an airport.

I just did a quick bit of googling* and couldn't find the specs of a 140mm fan that fast to give you an estimate, but consider that a Delta 8000rpm 92mm fan uses 37W. A 140mm fan will use substantially more than that.

Can you control the fan's speed? Turning it down will reduce its power consumption.

* I actually didn't use Google, but "googling" still feels like the right word to use.

Thanks for the help, I also did google search but couldn't find anything else.

Hmm...that might be right then, it's gonna to be more than 37W cause it stopped Civilization 6 from running. But then my PSU is a old Cosair TX 750W which is 10 years old already. I think it's almost up for its lifetime, the MTBF spec says 11.2 years, it's about time.

 

[gunslinger11]

That fan likely has to be powered by something besides a motherboard's standard fan header, just like the high RPM Delta fans. I would imagine it would consume way too much amperage, and would not work properly with a standard motherboard header (and could damage it). Most standard fan headers provide around 1 amp, although some have a special header that users can connect a pump to, and they can provide around 3 amps.

Why in the world would someone want some unknown brand 8000 RPM fan (unless they like the sound of a running vacuum cleaner)?

It's not as loud as a running vacuum, it's about I would say by estimation of one of my five sense, maybe 1/10?

It is connected to the molex 4 pins connection via a short converter cable, the fan itself attached with a 3 pin connector so I can hardly find out the RPM values.

But the most disappointing thing is that the fan doesn't help reducing my graphics board temp.

I am in the process of building a new PC.
My original PC is

Intel Core i5 3570K
Cosair H60 (old version, no LED)
ASUS P8Z77-I Deluxe
2*4GB Cosair Dominator 1333MHz Dual stick
Cosair TX 750W
Geforce GTX 560 Ti (Dead already)
!!replacxed by the current ASUS ROG STRIX RX 570 OC4GB
Bitfenix Prodigy
Windows 10

The system was built on 13 Feb 2013.

I did a cleanup yesterday, lots of static electricity dust and real dust and rearrange the default case fans to the rear and the radiator to the top. I disconnect the 140mm front intake fan now.

I want to know if I get AMD Ryzen CPUs, and a bigger Mid-Tower case, would ventilating heat from the AMD CPU a problem? How many more fans do I need if the case comes with 1 fromt 1 rear fans? I take it that NZXT has low pressure case H500, would that work for my new configuration?

 

[UsandThem]

I want to know if I get AMD Ryzen CPUs, and a bigger Mid-Tower case, would ventilating heat from the AMD CPU a problem? How many more fans do I need if the case comes with 1 fromt 1 rear fans? I take it that NZXT has low pressure case H500, would that work for my new configuration?

Running most CPUs at stock, with at least one front fan and one exhaust fan, would be fine and keep components from overheating. You don't need exotic ultra-high RPM fans to do this either. A good 140mm fan like the Noctua NF-A14 or Be Quiet Silent Wings 4 will move more than enough air.
Of course this also is dependent on your ambient temperatures where you use your PC.

My Be Quiet case has 3 x 140mm intake fans, and I use a Noctua NH-U14S for my cooler, and my Ryzen 2700X temperature really doesn't go past 60c (and with normal usage is usually in the 38c - 54c range).

 

[gunslinger11]

Running most CPUs at stock, with at least one front fan and one exhaust fan, would be fine and keep components from overheating. You don't need exotic ultra-high RPM fans to do this either. A good 140mm fan like the Noctua NF-A14 or Be Quiet Silent Wings 4 will move more than enough air.
Of course this also is dependent on your ambient temperatures where you use your PC.

Good one, I shouldn't have get the 140mm unknown brand fan! I appreciate your suggestion 1 front 1 rear configuration coz I m building a mid-range system.

My Be Quiet case has 3 x 140mm intake fans, and I use a Noctua NH-U14S for my cooler, and my Ryzen 2700X temperature really doesn't go past 60c (and with normal usage is usually in the 38c - 54c range).

While you mention 2700X and the cooler fan, I am a believer in all-in-one water-cooler, what you reckon? Should I change to the Air cooler?

I want to save some money for other stuffs, if I use the stock cooler comes with the 3600G, what you think? Also, I used to have integrated graphics with my Intel CPU, if I get a G Ryzen, would that be a bit odd?

My wished rig is as follow, appreciate your recommendation and opinions:

AMD Ryzen 3600G
Stock CPU cooler (to save money)
ASUS ROG STRIX X470-I Gaming
2*8GB Cosair Vegeance 3600MHz Dual stick
Transcend M.2
Cosair RM 750W
ASUS ROG STRIX RX 570 OC4GB (already using)***
CoolerMaster NR 600 or NZXT H500 (pretty much as price)
Windows 10

 

[UsandThem]

While you mention 2700X and the cooler fan, I am a believer in all-in-one water-cooler, what you reckon? Should I change to the Air cooler?

I want to save some money for other stuffs, if I use the stock cooler comes with the 3600G, what you think? Also, I used to have integrated graphics with my Intel CPU, if I get a G Ryzen, would that be a bit odd?

Using AMD's stock coolers are fine, as they are pretty decent coolers. They will keep the CPU temps within AMD's specs.

Using integrated graphics are fine, but they're not the best for gaming (compared to a separate GPU).

 

[gunslinger11]

Using AMD's stock coolers are fine, as they are pretty decent coolers. They will keep the CPU temps within AMD's specs.

Using integrated graphics are fine, but they're not the best for gaming (compared to a separate GPU).

Thank you for your information. I wish the CPU will be hovering around 50C

 

[ElFenix]

there's no way the fan is running 8000 rpm. the seller doesn't know or slipped when typing 800 (which is just audible, for me). i had a 5000 rpm fan that you could hear in the next apartment over once.

can you post the listing? i assume the fan itself doesn't have a label.

i'm guessing the Civ weirdness has nothing to do with the fan and it working after disconnecting is due to rebooting fixing the actual issue.

 

[GrumpyMan]

Fan that size running at that kind of rpm you could use to blow the leaves off your lawn in the fall..

 

[chrisjames61]

there's no way the fan is running 8000 rpm. the seller doesn't know or slipped when typing 800 (which is just audible, for me). i had a 5000 rpm fan that you could hear in the next apartment over once.

can you post the listing? i assume the fan itself doesn't have a label.

i'm guessing the Civ weirdness has nothing to do with the fan and it working after disconnecting is due to rebooting fixing the actual issue.

The blades would shear off well before 8000 rps.

 

[JEDIYoda]

When I was into gaming and had a nice computer with a lot of fans I would use a Zalman fan controller --one of these --
http://www.zalman.com/na/contents/products/view.html?no=502

 

[VirtualLarry]

lots of static electricity dust and real dust

Clarify the difference between those two things, please? I'm rather curious.

 

[gunslinger11]

Clarify the difference between those two things, please? I'm rather curious.

I took a shot as I was replacing a case fan. Hope you can see it, my phone camera is not first class.

The blades would shear off well before 8000 rps.

I took a coupld of shots of the fan, I guess it could be 3000 (+/-10%) I mean from the noise it generates.

there's no way the fan is running 8000 rpm. the seller doesn't know or slipped when typing 800 (which is just audible, for me). i had a 5000 rpm fan that you could hear in the next apartment over once.

can you post the listing? i assume the fan itself doesn't have a label.

i'm guessing the Civ weirdness has nothing to do with the fan and it working after disconnecting is due to rebooting fixing the actual issue.

It has two sides, there is a label on one side, on the other there is none.

 

[Mr Evil]

It's labelled "12V 0.3A". That means the power consumption is simply 12x0.3 = 3.6W, which falls somewhat short of what would be required for 8k rpm.

 

[gunslinger11]

It's labelled "12V 0.3A". That means the power consumption is simply 12x0.3 = 3.6W, which falls somewhat short of what would be required for 8k rpm.

Then what RPM would that be?

I have purchased a Furious Vadar 120mm 3000RPM fan today. It sounds like that one at 100%

 

[ElFenix]

Then what RPM would that be?

there's really no way of telling. searching for that part number doesn't give any additional info. you'd think amps drawn and rpm would be fairly consistent from brand to brand but poking around newegg doesn't give me a lot of confidence that that's true.