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Old December 2, 2009, 09:13 AM
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Join Date: Nov 2009
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Default fan placement question

this is for a Lian Li PC-65B

i have:
120mm (90 cfm) front intake covering bottom 3 5.25 drive bays
2 80mm front bottom intake (26 cfm each)
80mm top exhaust (37 cfm)
80mm rear exhaust (37 cfm)

question is, i discovered a way to attach another 90 cfm 120mm to the very bottom of the case, in line with the graphics card. if there's no vent, and all i have the fan doing is pushing air up towards the card/cpu/exhausts, is that good or bad?

i thought it'd be some nice airflow over the motherboard, but i don't want to eff up the front-to-back case airflow.

whatcha think?
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Old December 11, 2009, 01:06 PM
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Location: Acton, Ontario
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It wont necessarily cool your video cards anymore then they are since its just moving inside case air. If you have a fan nearby pulling into the case, then it would act like a booster to get the cool air deeper into the case. I am thinking it may help move the lower (ie cooler) air upwards and force more heat out the top. Maybe worth a try, measure before hand, then install the fan and rerun the tests to see if it helps.



Quote:
Originally Posted by sindraod View Post
this is for a Lian Li PC-65B

i have:
120mm (90 cfm) front intake covering bottom 3 5.25 drive bays
2 80mm front bottom intake (26 cfm each)
80mm top exhaust (37 cfm)
80mm rear exhaust (37 cfm)

question is, i discovered a way to attach another 90 cfm 120mm to the very bottom of the case, in line with the graphics card. if there's no vent, and all i have the fan doing is pushing air up towards the card/cpu/exhausts, is that good or bad?

i thought it'd be some nice airflow over the motherboard, but i don't want to eff up the front-to-back case airflow.

whatcha think?
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Old December 11, 2009, 01:28 PM
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Location: Calgary, AB
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You definitely would need ventilation holes, so that the fan brings in cool air. At the moment with no ventilation air, you're just circulating or rather pushing hot air towards the gpu, because since there is no space for any cool air to come in thru the fan, the fan is just pushing the air already inside the case..
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Old December 18, 2009, 12:11 PM
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wow i forgot about this question. those answers help very much, though. thank you guys =D
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