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I need to replace my Antec 3-fan, but with which fan?

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Right. I understand his setup. It does not change what I said. You still generally want front-to-back and bottom-to-top flow, even if the bottom mounted PSU is pulling air down into the PSU and out the back.

BTW, I think it would be good to verify the case model number. I note the Antec Three Hundred does not have a bottom air vent under the PSU but the newer Antec Three Hundred Two does have a bottom intake air vent. If this is really a Three Hundred Two, I would turn the PSU upside down so the PSU fan pulls cool outside air up through the filtered vent.

Even if the PSU must stay with its intake fan towards the top, that will still pull air from the front of the case. Intakes disrupt flow much less than exhausts.
 
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Ok lets see... which fan is incorrevtly mounted, if any? This is my current fan-setup:
PhotoGrid_1469643584283.png PhotoGrid_1469643620921.png

2nd photo shows 2 places where i can install vents... which spot should i choose to put a fan to, and which way do i put that fan..?

Brick, it is the regular Antec 300 with psu fan pointing upwards...

Also, i can TRY changing the direction of the heatsink, but does it matter which way i turn it..?
 
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Ok lets see... which fan is incorrevtly mounted, if any? This is my current fan-setup:
View attachment 77358 View attachment 77359

2nd photo shows 2 places where i can install vents... which spot should i choose to put a fan to, and which way do i put that fan..?

Brick, it is the regular Antec 300 with psu fan pointing upwards...

Also, i can TRY changing the direction of the heatsink, but does it matter which way i turn it..?

OK here's the situation. The rear fan is fine, I'm aware you have a new 140mm top fan on order, when you get it mount it so it exhausts hot air out the top of the case.

Now for my suggestion about the Heatsink, Whether you turn it or not is up to you, as long as the air is flowing towards an exhaust. However if you have the clips add another 120mm fan to the other side of the heatsink with both fans flowing towards the exhaust in a push/pull config. This will add to the cooling of your CPU.

BTW from looking at it your current CPU fan is flowing in the wrong direction, it should be blowing through the fins not pulling air through
 
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OK here's the situation. The rear fan is fine, I'm aware you have a new 140mm top fan on order, when you get it mount it so it exhausts hot air out the top of the case.

Now for my suggestion about the Heatsink, Whether you turn it or not is up to you, as long as the air is flowing towards an exhaust. However if you have the clips add another 120mm fan to the other side of the heatsink with both fans flowing towards the exhaust in a push/pull config. This will add to the cooling of your CPU.

BTW from looking at it your current CPU fan is flowing in the wrong direction, it should be blowing through the fins not pulling air through

okay, so i will switch the cpu fan the other way. thanks. not that easy to see which way the fan should blow, but after reading the explanations above, it's more clear, yes.

so, you suggest i should add another fan on the other side of the heatsink, as shown on this picture, or?
PhotoGrid_1469643584283.png

what about a fan on the front side of the cabinet? should i add one there as well, or?
 
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okay, so i will switch the cpu fan the other way. thanks. not that easy to see which way the fan should blow, but after reading the explanations above, it's more clear, yes.

so, you suggest i should add another fan on the other side of the heatsink, as shown on this picture, or?
View attachment 77403

what about a fan on the front side of the cabinet? should i add one there as well, or?

Yes, if a fan will fit on the other side of the heatsink it will improve CPU cooling. As for the front of the case if you don't already have 120mm fans in both of the lower 2 bays, there should be.
 
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gotcha. will see what i can do.

however, a small problem now... i got the new noctua 140mm fan today, BUT... then there's this power cable to the fan "problem" again... i got only molex power cables left... hmm.. some said i could connect the power cable to the fan to one of the 3-pin ports EVEN if there are 4-pins on the fan, or..? any ideas on that?
 
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ok, so i figured it out rather easily by attaching the 2 fans onto a 2-in-1 4-pin power cable. i also mounted a 120mm to the front of the cabinet, so it works brilliantly now! the airflow seems to be muuuch better now! 1 question though: the fan in the front, shall it be the same way as the fan on the top or the other way around, perhaps?

thread can be now marked as solved, i suppose.

many thanks for the assistance, help and guidance to this, you all!
 
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