Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Possible power supply fan issue w/ Win 7

04 Jan 2010   #1
Zathras

Win7 Home Premium x64
 
 
Possible power supply fan issue w/ Win 7

I haven't kept up with power supply technology at all, on my old PCs that ran Win 95 thru XP, I generally had 250W-450W power supplies that were pretty noisy. The power supply fan ran all the time, and expelled quite a bit of warm air.

On my new PC with Windows 7, I have a "700 watt" power supply that seems to work OK, but I notice that after Windows loads the power supply fan seems to stop running, or runs so slowly that you can't hear it. There is very little air movement coming out. During bootup the power supply fan (I think) whirs and hums like I'd expect; but the instant the Windows7 logon screen comes up, the fan goes silent. Are power supply fans supposed to be variable speed or load-dependent, now? Is the power supply tied in to the OS somehow?

Thanks... although everything seems to be working fine, I don't want to fry my PC and/or power supply.


My System SpecsSystem Spec
.
04 Jan 2010   #2
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

You didn't specify brand/model of the PS, so I can't make a flat statement, but yes many PSs have internal thermal controllers which only run the fan when needed. I'm not aware of any direct control of this fan via the OS, but when any Windows OS finishes loading they power requirement would lower, thus reducing the need for the fan. My PS has both a bottom fan for intake, and a back fan for exhaust, and only the intake fan is thermally controlled. I might be somewhat more concerned if the exhaust fan wasn't spinning.
My System SpecsSystem Spec
Reply

 Possible power supply fan issue w/ Win 7




Thread Tools




Similar help and support threads
Thread Forum
CPUID HW Monitor - Does this look like a power supply issue?
My cpu with an INTEL water cooling system shows 170-180 degrees with no applications open and the virus scanner running over night. . . These voltages don't look right, so is my motherboard dying or is the power supply dying or something else? see attachment
Hardware & Devices
PC powers off after several minutes, not power supply issue.
Hi there, sorry if this or a similar issue has been posted before. Several hours of googling didn't help me solve this issue. I built my computer last year and recently it has been powering off instantly between displaying the BIOS info and displaying the windows booting animation. I have...
General Discussion
Issue with new power supply
The power supply on my PC works, but the fan is making an intermittent "tic-tic-tic" noise, so I decided to replace it. After installing the new power supply, I got nothing. No LEDs, no fan, no hum... nothing. So I pulled the new power supply out, manually jumped pin 14 to ground, and it fired...
Hardware & Devices
Power Supply Issue
Have a strange issue with my computer. Started recently, when shut down, power switch will not turn on computer. If I pull the powercord for 20 secs or so, it will power on fine. Tried a new power cord, same symptoms.... Is this a failing PSU or motherboard issue?
Hardware & Devices
Power Supply Issue
Wasn't sure where to post this (slightly off topic but I figured someone on here would be able to shed some light on this). I have an HP DV7-4285DX laptop, the machine runs Windows 7 Home Premium and is performing quite well after a good weekend of "De-OEM'ing" (uninstalling the crap it came...
Performance & Maintenance


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 01:25.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App