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MikeJeffries 11-12-2019 01:47 PM

Cooling Tips Needed for Corsair 680x
Hi Guys!

I got myself a 680X and a 9900KS, and I need tips on how to do the cooling.
Should I leave the 3 front fans on top and use a 280mm AIO on top or change it to a 360mm Radiator in front and put 2 fans on top?

Also, I plan to add 1 or 2 fans on the bottom of the case, should I make them intake or exhaust?

The front 3 will be Intake, the rear one is exhaust
I will make the top (fans or radiator/fans) exhaust out also
Should I make the bottom intake too, that way front and bottom intake, top and rear are the exhaust?

Lastly, if I do the radiator on top, whats better, fans on top of the case (on the outside, with radiator on the inside?

Need help please!

c-attack 11-12-2019 02:26 PM

Ignoring all other considerations, a 360mm on the front likely winds up being 2-4C cooler than a 280mm up top. Half because the front rail is 2-3 cooler than the top above the VRM and RAM and likely another 1C in cooling advantage of a 360 vs 280.

However, there definitely are some other considerations. If you go into the cases section and search 680x, you should find multiple threads with pictures. One of the critical elements in working with a 360mm in that case is what happens with the fans. Obviously you would like to keep the LL120 fans on the front glass, with the radiator behind. That pushes the radiator 25mm further into the case and other users are reporting a collision issue between the front radiator and top mounted fans. I think 140mm fans up top is a problem. 120mm fans might work. If you do put a 280mm up top, that eliminates the front fan issue. It should be unnecessary to mount the fans outside the case. You likely want them underneath for lighting purposes and further away from the glass.

Bottom fans should be intake, regardless of the front 360 vs top 280 decision.

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