Noctua NH-U9B SE2, AMD FX-6300, Gigabyte GA970A-DS3P and old unnamed case

moerpho

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Jun 11, 2014
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This is my first post here so bear with me. If this has been answered before feel free to point me in the right direction.

I recently upgraded my old Core 2 Duo to a somewhat newer system in order to be able to play some never games. This is an ongoing project, but I'm rather poor and working on a constrained budget. My problem is:

When I used the Noctua NH-U9B SE2 cooler on the 775-socket it would suck in air from the front of the case to the back. My case is not very big and only has a fan at the back, but despite being rather cramped it did the job I expected. Yesterday I got my upgrade-packet and was rather surprised when I discovered the only way to install the NH-U9B SE2 on the AM3+ socket was horizontally - i.e. sucking air from the bottom towards to top. Instead of having the intake fan right over the RAM it is now directed towards the GPU. I haven't tried gaming yet, but while setting up the new Windows install temps are fluctuating between 20 to 50 degrees celcius dpending on load. This is also a cabinet with a topmounted PSU. Not unlike Airflow Option 2 in the picture, but with a smaller case.

nh_u12p_airflow_options.jpg


My question is: should I keep like it is or reverse the flow? The way I see it it is now sucking hot air from the GPU into the CPU and then onto the PSU. There is no ventilation at the top of the cabinet. Would the other way around be better?

I'm planning on buying a Fractal Design R4 Pearl cabinet in a couple of weeks and suspect that would solve my problem, but would be nice to know what to do untill then.
 
Solution
Welcome to Tom's Hardware!

I would use Airflow Option 1. It takes cool air, uses it to cool the CPU, and blows that hot air straight out of the case. Option 2 takes warm GPU air, cools the CPU, and blows that hot air into the PSU to cool that off. Quite inefficient, if you ask me.

wolverine96

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Mar 26, 2014
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Welcome to Tom's Hardware!

I would use Airflow Option 1. It takes cool air, uses it to cool the CPU, and blows that hot air straight out of the case. Option 2 takes warm GPU air, cools the CPU, and blows that hot air into the PSU to cool that off. Quite inefficient, if you ask me.
 
Solution

moerpho

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Jun 11, 2014
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Airflow option 1 would be my preferred solution, but the problem is that it is not an option on the Gigabyte board the way it is set up. BIt hard to explain without being able to show, but trust me - I've tried pretty much anything I could think of to get it set up that way.

Anywho...since I posted my query I've actually figured it out myself. The problem was that I had either misunderstood an explanation or someone was downright wrong about the position of the fans. The way I originally installed it was actually blowin air out and nothing else - i.e. both Noctua-stickers facing out. By changing direction on the fan closest to the GPU (both stickers pointing towards the top) everything seems perfect. Played Watch Dogs for an hour and it never crept above 50 degree celcius and thus I'm a happy gamer.

I'll probably do some overclocking when I get the new cabinet. Real pleased with this upgrade and looking forward to whenever I'll be able to afford a new GPU as well.