Case fan issue

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Joined
23 Sep 2009
Posts
35
Hi Folks,
Bit of a cooling issue with my new(ish) rig at the moment. After my Gigabyte z87-oc bit the dust along with 2x XfX PSUs, I've had a new mobo and PSU (as below). However, noticed today the stock CPU fan was on full, so checked out the case fans and they weren't on at all.

Case: Fractal Define XL -7 fan mounting points
Mobo: Asus Maximus Hero VI (4 pin connectors)
PSU: 850w BeQuiet modular (with 3 x fan connectors)
CPU: i5 4670k (stock)
GFX: GTX 770

Stock case fans = 3x 140mm 3pin (one at rear, one at bottom, one at front)
Additional ones: 1 x fractal silent series 140mm in side (3pin), 1 x bitfenix spectre 140mm on top (3pin), 1 x bitfenix spectre 140mm front (3pin)

The 3 x stock case fans are connected to a molex plug which doesn't seem to want to play anymore when connected to a lead from the PSU, and the other fans are connected directly to the PSU, which means unfortunately that there is no control over speed.

Is it worth getting a fan controller and connecting all / most of the fans up this way, or would a molex > 4 way fan adaptor thing work? I've tried the two different modular cables that use molex but the fans still don't work. Alternative, flog the 3 pin fans on fleabay and buy some 4 pin fans (but this will be more expensive than a controller).

TLDR: Fan controller / molex to 3pin adaptor / 4pin fans ?
 
Can you not just connect them to the motherboard? Not sure about the hero but the Maximus VI formula has 8 fan connectors onboard. This will allow full control of fans via bios or ai suite.
 
Can you not just connect them to the motherboard? Not sure about the hero but the Maximus VI formula has 8 fan connectors onboard. This will allow full control of fans via bios or ai suite.

Fans are 3 pin fans, and mobo connectors are all 4pin. Not sure if it was this that caused it but last time I was arsing around with fan connectors on motherboards the PSU refused to start and then the mobo refused to work.
 
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