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PSU Runs AKA I Can Boot Up My Computer And It Run But Fan Not Running?

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April 17, 2012 8:50:19 PM

Hey everyone I just got my Corsair AX850 PSU so i put it in and great it works, my computer is running and was going to start a movie. Before I did that I was going to put the side case on, since i knew it works now but i realized that the fan is not working at all, the unit is not spinning. So i thought something was stuck which i didn't see anything, so i reboot the computer and then the PSU fan starts spinning for about 1-2 secs. So is it something that i can fix's or just send it back to newegg.ca???? Never seen this before, so any thoughts you guys?

I'm Running This:

CPU: AMD FX6200

GPU: AMD 6970 XFX x2

MB: ASUS Sabertooth 990FX

RAM: G.SKills Sniper DDR3 2x8GB 1600 1.25 Low Voltage

SSD: OCZ Agility 3 SATA 3 128GB

HDD: WD 1TB Caviar Black 7200RPM Sata 6GB 64MB Cache

PSU: CORSAIR Professional Series Gold AX850 GOLD Certified Full Modular Active PFC Power Supply.

Antec 1200 Case Full Upgraded Fans, With 6 Fan Controller

LG Blu-Ray Burner

Windows 7 Home Premium


a c 121 ) Power supply
April 17, 2012 8:59:58 PM

Check your documentation. I am pretty sure that PSU's fan only runs when the PSU is under load; was there not a warning band around the PSU when you got it? That PSU is based on the Seasonic "X" series, and that is how they are.
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a c 111 ) Power supply
April 17, 2012 9:19:19 PM

^+1 the higher corsair ones don't actually start their fans until a certain temperature/load is reached. Don't worry, it all works out!
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April 17, 2012 10:08:47 PM

amuffin said:
^+1 the higher corsair ones don't actually start their fans until a certain temperature/load is reached. Don't worry, it all works out!



Really it's fine? So your saying it will only spin the fan when I play a blue-ray movie for a while and or play a hard core game like BF3 at full graphics?
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a c 1176 ) Power supply
April 17, 2012 10:20:51 PM

From Corsair:

Ultra Low Noise — Hybrid Silent Fan Control

The Corsair AX850's energy-efficient design allows it to operate reliably with minimal cooling, and hence very low noise levels. The AX850's Hybrid Silent Fan Control technology offers three modes of cooling, depending on the load level. This includes a fanless mode of operation (0 rpm) up to about 20% load, a quiet, low fan speed cooling mode for typical loads up to around 50% load, and a higher performance cooling mode for more demanding loads. Noise levels still remain low even when fan speeds start to climb, thanks to the use of a premium-quality 120mm San Ace fan from industry-leader, Sanyo Denki.
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a c 111 ) Power supply
April 17, 2012 10:21:43 PM

It will only spin when a load/certain temperature is reached. So if you are just surfing the internet and not doing anything that will really draw power, there is no point of the fan spinning because there really is nothing to cool down! However, when you play a game such as metro 2033 where both of your cards will be sucking a lot of power, that is when the fan will spin up!
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