fan positioning and direction

paradisiac · 14 Mar 2011 at 16:06

hi, ordered a the Coolmaster HAF 912 Plus and the Arctic Cooling Freezer 7 Pro Rev 2 CPU Cooler. will be turning up tomorrow, so want to be prepared so its a job that i only have to do once. basically, how should i setup the fans?
if i say let the 200mm front fan pull air in, the rear 120mm fan push out. then add say 2 120mm top fans pushing out and also 1 side fan pulling in. that should concentrate all the cold air onto the gfx card and cpu? so which way would i want the cpu fan blowing?

TheGedi · 14 Mar 2011 at 17:17

paradisiac said:
hi, ordered a the Coolmaster HAF 912 Plus and the Arctic Cooling Freezer 7 Pro Rev 2 CPU Cooler. will be turning up tomorrow, so want to be prepared so its a job that i only have to do once. basically, how should i setup the fans?
if i say let the 200mm front fan pull air in, the rear 120mm fan push out. then add say 2 120mm top fans pushing out and also 1 side fan pulling in. that should concentrate all the cold air onto the gfx card and cpu? so which way would i want the cpu fan blowing?

On AMD Boards you can only mount the Cooler Facing upwards or downwards, kind of a pain because if i want fans at the top of my case im going to have to remount it, but im not keen on Mounting it downwards towards the graphics card :S

paradisiac · 14 Mar 2011 at 17:25

ok, well that sux a bit. so how would i be best doing it so the fan is at the top and pulls the heat from the heatsink, and have the top case fans blowing the air out?

joxang · 14 Mar 2011 at 17:27

Top fans out-takes, cpu cooler pushing air out the top.

paradisiac · 14 Mar 2011 at 17:28

so have fan facing down pushing through the heatsink?

LiamJ · 14 Mar 2011 at 17:31

Fan facing UP, pushing through the heatsink.

paradisiac · 14 Mar 2011 at 17:39

yeh, but on the bottom of the heatsink?

LiamJ · 14 Mar 2011 at 17:40

Yes.

C64 · 14 Mar 2011 at 17:42

Fan facing towards the rear exhaust, no idea why anyone would want to have a fan drawing warm air from the top of a gpu on to the cpu heatsink other than not being able to fit a cooler in the proper configuration.Having 2x 120mm at top probably wont make any difference at all over having one fan up top test it and see but I'd say 2x120mm up top wont give lower temps over 1x 120mm.

I'd take that middle hard drive cage out too if that is possible and just use the lower one.

joxang · 14 Mar 2011 at 17:44

C64 said:
Fan facing towards the rear exhaust, no idea why anyone would want to have a fan drawing warm air from the top of a gpu on to the cpu heatsink.

Not sure if this is accurate as I've never used and AMD board before but:

On AMD Boards you can only mount the Cooler Facing upwards or downwards, kind of a pain because if i want fans at the top of my case im going to have to remount it, but im not keen on Mounting it downwards towards the graphics card :S

Was posted about 5 posts up.

Also, on Intel boards, I've seen benchmarks with Megahalems blowing up instead of out the rear show a 1-2 degree improvement, as the heatpipes line up perpendicular to the cpu cores instead of parallel to them. Definitely reasons for mounting a heatsink like that. That was with a rear exhausting gpu though.

C64 · 14 Mar 2011 at 17:57

Really ? didn't know you couldn't mount this way on that board but as for improving temps that could be heatsink and case dependant certainly gives me higher temps every time I have tried that config.

In that case I would try like this

paradisiac · 14 Mar 2011 at 18:05

C64 said:
Really ? didn't know you couldn't mount this way on that board but as for improving temps that could be heatsink and case dependant certainly gives me higher temps every time I have tried that config.

In that case I would try like this

would you have side fans also, if so, cold air in or warm air out?

C64 · 14 Mar 2011 at 18:12

Side fan isn't needed imo unless you going dual gpus.

paradisiac · 14 Mar 2011 at 18:16

will be hopfully adding a second HD6850 soon

C64 · 14 Mar 2011 at 18:43

The main thing is getting that large front fan pushing in air towards the gpus without that middle big hard drive cage in the way.

paradisiac · 14 Mar 2011 at 18:44

C64 said:
The main thing is getting that large front fan pushing in air towards the gpus without that middle big hard drive cage in the way.

i have 5 hard drives

so they will get in the way?

C64 · 14 Mar 2011 at 18:56

well you could run 2 at the bottom and 3x in the 525 bay if i were going xfire I'd want that big front intake having a clear as possible path to the gpus."Coolermaster Full Alloy 4 in 3 Devices Module" it's a cage for 3x hdd in the 525 bay with a fan you can get similar from lian li silverstone etc.

paradisiac · 14 Mar 2011 at 21:31

ok thanks will look into that, i currently have one of my drives in a plastic adaptor so its in a 5.25 bay so could just run my 2 raided drives and that drive for now and see how temps are.