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chassis fan speed locked at 1000rpm?!

post #1 of 5
Thread Starter 
i recently discovered my h70 is not quite running up to spec, so i opened asus ai suite to check, it appears the cpu speed is at ~2000rpm(normal) but the two chassis fans on my radiator is only like ~1000rpm... isn't the fans suppose to be more than that? i then go to my bios and try to bump the fans speed and there's no way in hell i can do that. when i set the chassis fan mode to "turbo" it's ~1000rpm, same if i set it to "standard" and "quiet"!!!??! is my fans dying or something? they're the stock ones that came with the h70... suggestions?

PS: the fans are connected via a adapter that came with H70 to a single 3-pin port on my mobo.
mission3
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mission3
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CPUMotherboardGraphicsRAM
i7 980x Asus sabertooth x58 2x ASUS GTX 480 SLI 6GB corsair DDR3-1600 
Hard DriveOSMonitorPower
Crucial M4 128Gb + 1TB seagate HD Windows 7 ultimate 64-bit ASUS VG236 23" 120hz + 3d vision, Acer H233H 23" Corsair AX1200 
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post #2 of 5
Try connecting it directly to a molex connector on the PSU, the mobo may not be able to provide enough power.
post #3 of 5
Quote:
Originally Posted by hermitmaster;11856837 
Try connecting it directly to a molex connector on the PSU, the mobo may not be able to provide enough power.

this. if you plug to many fans into 1 motherboard port, it can overload it, or cause the fans to not run at maximum speed. plugging the fan directly into a molex adapter will ensure that the fans are running at there maximum speed.
My System
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My System
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2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
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c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
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Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
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post #4 of 5
U need to Disable Qfan control in the BIOS. DISABLE.
The Liberator
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The Liberator
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Hard DriveOptical DriveOSMonitor
2 Samsung 1TB F3s in 2 RAID0 arrays LG 10X Blu Ray Drive Windows 7 Ultimate 64 (Fully Tweaked) Samsung T260 26" LCD 1920x1200 5ms 
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I-ROCKS KR-6820E-BK Back-lit Gaming Keyboard Corsair AX 850 Gold CoolerMaster ATCS 840 Black +Silverstone CFP51 bay Logitech G5 original 
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post #5 of 5
The 2 fans that come with a H70 is not PWM but simple 3-pin fans.

If connected to a molex (from the PSU) or connected to the mobo (with disabled Asus' QFan), they will run at full speed (2000rpm). Some people find both fans at this max speed noisy.

As an alternative, one may use the provided set of cables to bring the speed down to a fixed speed of 1600rpm.
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