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[Help] Very Confusing Case Fan Situation...

Konasumi
By Konasumi
in Cooling
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Go to solution Solved by WoodenMarker,

You're supposed to measure across the side of the fan and not diagonally across it.

47558b850a0b6295298548420f895dfc.png

Posted

Hi guys, I need some help finding out what fan I need to put in my system. I have a HP A6847C, and I want to buy a new exhaust fan for it. I opened up the computer and I measured the exhaust fan to be five inches, or 120MM. I put that into Google, and I found out that it is 127mm.

 

I bought a 120MM case fan from Newegg a couple weeks ago to find out that it is way too big for my chassis. I triple checked the size of the default case fan, and it's five inches from corner to corner.

 

I am very confused. Am I missing something, or do I just suck at measuring?

 

Here's a picture of the fan: uaKtEU0.jpg?1

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Welcome to the world of OEM computers.

 

That rear fan looks like a 92mm to me but i can't really tell because there isn't much to base that on.

My Reviews: Sennheiser HD 518 Mayflower Electronics ODAC/O2 Review

My Tutorials: How To Play Crysis on Linux in DirectX 10 with DXVK Splinter Cell Conviction General Protection Fault Fix

 

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Posted
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You're supposed to measure across the side of the fan and not diagonally across it.

47558b850a0b6295298548420f895dfc.png

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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Posted

Hi guys, I need some help finding out what fan I need to put in my system. I have a HP A6847C, and I want to buy a new exhaust fan for it. I opened up the computer and I measured the exhaust fan to be five inches, or 120MM. I put that into Google, and I found out that it is 127mm.

 

I bought a 120MM case fan from Newegg a couple weeks ago to find out that it is way too big for my chassis. I triple checked the size of the default case fan, and it's five inches from corner to corner.

 

i think thats a 90mm fan...u can get a cooler master 80 or 90mm fan and then replace it with that... :)

get this one...

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16835150031

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Welcome to the world of OEM computers.

 

That rear fan looks like a 92mm to me but i can't really tell because there isn't much to base that on.

 

My apologies about the picture, it's the only good picture I had of the fan.

 

 

You're supposed to measure across the side of the fan and not diagonally across it.

47558b850a0b6295298548420f895dfc.png

 

Thank you! I was told to measure from corner to corner, but whoever I heard that from was wrong.

 

 

I measured it, and it was 90MM.

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My apologies about the picture, it's the only good picture I had of the fan.

 

 

 

Thank you! I was told to measure from corner to corner, but whoever I heard that from was wrong.

 

 

I measured it, and it was 90MM.

Damn i was so close.

My Reviews: Sennheiser HD 518 Mayflower Electronics ODAC/O2 Review

My Tutorials: How To Play Crysis on Linux in DirectX 10 with DXVK Splinter Cell Conviction General Protection Fault Fix

 

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Anyone know if this is a good fan? I would like something with LED's, but this was the only one I could find.

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16835119069

 

The most important thing is that you get enough airflow.

 

The fan that's already in the case should have a serial number on the sticker. If you run searches for that number you should hopefully be able to find out how much air it's moving. You should match or exceed that airflow for safety sake, otherwise your system might overheat.

 

I ran some searches and found an ultra quiet 90mm fan with blue LEDs but there's a good chance it might not move enough air to keep your system properly cooled:

http://www.moddiy.com/products/PCCooler-Ultra-Silent-90mm-Blue-LED-Black-Fan-(18-dBA).html

 

The others I found are all 92mm so you'd have to do a little investigation to find out if it'll fit your machine, although I'd imagine it would (just not sure if 90 and 92mm fans are set standards with differing form factors in terms of the positioning of the screw holes, since I've never really used them).

 

This one looks pretty cool (Edit: it just occurred to me that what you need for your case is a fan to extract air, and the CoolJag programmable fan has the wording projected through the clear fan-blades so that they're visable from the side that would need to be facing into your case, which means it's probably not such a great choice for your needs) I don't know how easy it is to program it but it looks pretty cool (the one in the video is an 80mm fan but there's a 92mm version)...

 

http://www.thefind.com/software/browse-cooljag-programmable-led-flash

 

Another 92mm: Thermaltake make a blue LED fan: http://www.thermaltakeusa.com/ttWWW/Product.aspx?C=1166&ID=1951

 

But definitely the most important thing is to get adequate airflow for your system, which means getting a fan that will push as much or more air than the stock fan that came with the case. Run a search for the serial number on the sticker on the stock fan to track down how much air it's moving.

 

There's a green 92mm LED case fan here (almost all of the other ones I've found are blue)...

http://www.frozencpu.com/cat/l3/g36/c331/s516/list/p1/Fans-12_Volt_Fans_-_LED_UV-92mm_x_25mm_LED_Fans-Page1.html

"I try to put good out into the world...that way I can believe it's out there." --CKN                  “How people treat you is their karma; how you react is yours.” --Wayne Dyer            

[Needs Updating] My PC: i5-10600K @TBD / 32GB DDR4 @4000MHz / Z490 AORUS Elite AC / Titan RTX / Samsung 1TB 960 Evo / EVGA SuperNova 850 T2

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