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What's more important? Intake or Exhaust?

Last response: in Components
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January 23, 2014 7:04:55 PM

Alright, so about two weeks ago, I got my prebuilt gaming PC in the mail and it's been great. It has:

*AMD Fx 6300 with stock cooler
*Gtx 650 ti 2gb gigabyte OC edition
*Gigabyte GA-78LMT-S2P rev 5
*1x8gb Ram
*DVD player
* This case: http://www.sama.cn/en/showproducts.asp?id=56

But for some reason, it didn't come with any case fans. Which is a problem since I want to be doing demanding tasks such as Battlefield 4.
Problem is my mboard only has 1 sys fan slot and I don't want to get a fan controller becuase they're ugly and expensive and take a lot of work to put into a PC. Also, I don't want to plug any fans directly into the PSU because then they'll be running they're highest, all day.

So, do you think a 120mm Intake fan, an 120mm side fan or a 80mm exhaust fan would be the most important to get?
January 23, 2014 7:09:21 PM

120mm front intake with 80mm exhaust....unless you can fit a larger exhaust fan.
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January 23, 2014 7:13:48 PM

Well, you're gonna need more airflow then one fan will provide. I would get a front 120mm fan and plug it into a molex connection from the PSU. Take a look at the sticky thread at the beginning of 'component' re. fans and you should be able to find a 120 with decent airflow and lower rpm.
If the back panel will only hold an 80mm fan, then stick one there as exhaust. This is probably your most important fan! as it will move warm air out of the case and allow air to enter at room air-pressure if you do NOT put a 120 up front.
Fans are pretty inexpensive; the design of a 120 up front and 2x120 on the side for intake and an 80 in the back would provide positive air pressure inside the case for the best cooling scenario.
Any chance of mounting a 120mm on the back for exhaust? Didn't see a picture of the back but often larger fans can be mounted.
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January 23, 2014 7:15:27 PM

Positive verse Negative pressure will be an ongoing debate. For my rigs, in my hot office, negative pressure seems to work best. I've seen evidence of the opposite being true. So you honestly won't know until you try.

Arctic Cooling F-series PWM have the ability to daisy-chain the fans together, so they will work off from one fan header. Very affordable as well.
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January 23, 2014 7:16:09 PM

Assuming that you are asking us which of the three you should pick(only one total), I would recommend 120mm intake on the side panel. If you are sticking to ONLY one fan then an intake on the side panel allows air to blow directly on the face of your MB and move hot air from the CPU cooler away.(to blow in any direction it wants to go) I would HIGHLY recommend more than one fan. You could put one fan on the header and buy a low RPM fan so even if you plug it right into the PSU it will not sound like a jet engine.
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January 23, 2014 7:39:42 PM

I suggest taking intake from the front and outtake from the side. heat rises so if you are taking air out the front it will just be pulling the cool air from cpu. If you have the outtake on the side it will pull the heat away from the cpu.

I cant really tell if you can put a fan in the back but if so you could also make that outtake.
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January 23, 2014 8:12:45 PM

If only 1 fan will be fitted, I'd go with an exhaust fan if it can be installed in the rear of the case.
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January 23, 2014 9:29:50 PM

There isn't a chance that I could fit a bigger fan into the 80mm fan slot. I don't know about putting fans straight in the PSU.. Won't they be noisy? Or a better question, what db-a would be considered quiet in a fan?
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January 23, 2014 9:47:52 PM

littlejoelgriffo said:
There isn't a chance that I could fit a bigger fan into the 80mm fan slot. I don't know about putting fans straight in the PSU.. Won't they be noisy? Or a better question, what db-a would be considered quiet in a fan?


I don't know db ratings of fans but almost any fan that costs for than $10 will be nearly silent at full power. I have four fractal design 120mm fans (all plugged into the power supply) and you can barely hear them, even when they're all on full. Make sure to read the reviews.

You'll definitely want to get more than one fan. You don't want to bake your computer.
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January 23, 2014 10:27:10 PM

Well thanks for the ideas guys, though in response tozeph_yr after playing 1 and a half hours of MW3 on ultra settings, speed fan didn't measure a single componet that was over 50C. I'd hardly call that a bake. But that's on stock clocks, and I'd like to do some mild OCs.

Anyways, could you guys define a "low RPM fan" as in, would the 1200 rpm fan be any good here: http://www.ebay.com.au/itm/120mm-Fans-4-LED-Blue-for-Co...

I can't go around buying any fancy brands like Cooler Master because the shipping to Australia is too expensive
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January 23, 2014 10:28:39 PM

Well thanks for the ideas guys, though in response tozeph_yr after playing 1 and a half hours of MW3 on ultra settings, speed fan didn't measure a single componet that was over 50C. I'd hardly call that a bake. But that's on stock clocks, and I'd like to do some mild OCs.

Anyways, could you guys define a "low RPM fan" as in, would the 1200 rpm fan be any good here: http://www.ebay.com.au/itm/120mm-Fans-4-LED-Blue-for-Co...

I can't go around buying any fancy brands like Cooler Master because the shipping to Australia is too expensive
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January 24, 2014 4:12:47 AM

A fan at 17.5db would be rather quiet but 38.4cfm isn't much air flow.
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