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Fans NEVER Spin in my Corsair RM650!

post #1 of 15
Thread Starter 
The fan on my new Corsair RM650 650w Power Supply never spins! Even at computer start up and under stress.

I realise it has the special 'Zero RPM' feature, but thats only supposed to be effective up to 40% load I believe.

However even when benchmarking running Unigine and Cinebench simultaneously on extreme mode it doesnt even spin! Surely that uses more than 260W!

Unfortunately my computer is BlueScreening frequently at the moment (trying to solve in another thread) - perhaps due to the power issues, so am unable to run the tests for long though. But even so I thought this would be enough to cause the fan to start moving.

Does it sound faulty? Is there any way to remove the Zero RPM mode temporarily so I can test it more?

Thanks, Ben thumb.gif


PC: Windows 7 64bit, Radeon R9 270X 4GB, Intel Core i5 4570, Corsair 8GB 1600MHz, Sandisk 240GB SSD, Asus H87M-PLUS
post #2 of 15

It's never spinning up because you are never getting the power consumption high enough. Your CPU isn't consuming any more than 84W, and your video card isn't consuming any more than about 175-180W. Add in the rest of your system, and your total power consumption cannot exceed about 350-375W. Your PSU is extreme overkill.

It's a computer!
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 15
The ZeroRPM mode is based on ambient temperature and load. It is 40% load at 25c ambient. If you are in a room less than 25c it will take more load than 40% to get it to turn on.

There is no way to turn the ZeroRPM mode off. To bad the RM1000 is the only one that comes with the USB dongle or you could see exactly how much power the +12 volt rail was really using under load on your machine.
post #4 of 15

Yeah, you are not doing it right. Need more overclock.

Titan
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Titan
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post #5 of 15
Thread Starter 
Thanks for the quick replies. I didnt realise it was based on ambient temperature too. Im guessing thats ambient temperature inside the case though? It rarely gets to 25c+ here!

And yeh I do realise its a slight overkill but I wanted a fully modular power supply to keep my case as neat as possible and the lowest wattage one available was 550W and for a few £1s more there was the 650W, so got that!

Actually the reason I went for the RM series was for the low noise as its going in a HTPC. However if the fan never comes on wont the PSU metal frame warm up and dissipate all its heat passively inside the case making everything hotter? Should I consider getting a different PSU? Im already worried about air flow and temperatures!
Edited by BENBOBBY - 3/20/14 at 5:51pm
post #6 of 15
Quote:
Originally Posted by BENBOBBY View Post

Thanks for the quick replies. I didnt realise it was based on ambient temperature too. Im guessing thats ambient temperature inside the case though? It rarely gets to 25c+ here!

And yeh I do realise its a slight overkill but I wanted a fully modular power supply to keep my case as neat as possible and the lowest wattage one available was 550W and for a few £1s more there was the 650W, so got that!

Actually the reason I went for the RM series was for the low noise as its going in a HTPC. However if the fan never comes on wont the PSU metal frame warm up and dissipate all its heat passively inside the case making everything hotter? Should I consider getting a different PSU? Im already worried about air flow and temperatures!

 

You're not pulling enough power to generate enough heat for it to be a problem. It's not slight overkill, it's massive, extreme overkill. Your absolute highest possible power draw is roughly 50% of the PSU's total capacity. That's not a good thing in terms of your average efficiency, but it's good to know this so that you can relax. ;)

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #7 of 15
Quote:
Originally Posted by BENBOBBY View Post

Actually the reason I went for the RM series was for the low noise as its going in a HTPC. However if the fan never comes on wont the PSU metal frame warm up and dissipate all its heat passively inside the case making everything hotter? Should I consider getting a different PSU? Im already worried about air flow and temperatures!

With say 250W from the PSU (high for that system), that is around 25W of heat the PSU is putting out. It's not that significant when you're talking case temps. And anyway, at that kind of draw the other components' fans are circulating air. At something more like idle, the heat generated by the PSU may be single digits watts, so that shouldn't be too much of a concern. Consider it like the heat of a hard drive at load.
post #8 of 15
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

It's not slight overkill, it's massive, extreme overkill. Your absolute highest possible power draw is roughly 50% of the PSU's total capacity.

lol oops. Although the recommended power supply for my GPU is 500W I believe so I thought why not get a bit more! Will also have; soundcard, tv tuner, blu ray drive, front panel display, and various usb connections - wireless dongle, mouse, keyboard, xbox controller etc so thought its better to be safe. Btw drunk 16oz of water this morning! rolleyes.gif

Quote:
Originally Posted by mikeaj View Post

With say 250W from the PSU (high for that system), that is around 25W of heat the PSU is putting out. It's not that significant when you're talking case temps. And anyway, at that kind of draw the other components' fans are circulating air. At something more like idle, the heat generated by the PSU may be single digits watts, so that shouldn't be too much of a concern. Consider it like the heat of a hard drive at load.

Ah ok, good to know! RM series was a good choice after all then for a HTPC?! biggrin.gif
post #9 of 15
Quote:
Originally Posted by BENBOBBY View Post


lol oops. Although the recommended power supply for my GPU is 500W I believe so I thought why not get a bit more! Will also have; soundcard, tv tuner, blu ray drive, front panel display, and various usb connections - wireless dongle, mouse, keyboard, xbox controller etc so thought its better to be safe. Btw drunk 16oz of water this morning! rolleyes.gif
Ah ok, good to know! RM series was a good choice after all then for a HTPC?! biggrin.gif

 

500W is the peak-rating. A typical 500W peak-rated PSU would have a +12V capacity of 360W. Yours has a +12V capacity of 650W. Major, major overkill. lol

 

All of those things you listed don't consume much power at all...

 

So, after drinking 16oz of water when you woke up, how did you feel? Was it a different morning than usual? Better? Same? Worse? lol For me, I like to drink anywhere from .5 to 1.5 liters (my bottles are 500ml a piece which is just a hair over 16oz). I sometimes want less and I sometimes want more. It just depends. If I want more, then I'll sometimes end up drinking 2 liters, but it's a bit rare so far. I find that this is a fantastic way to start the day though.

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
post #10 of 15
Quote:
Originally Posted by BENBOBBY View Post

Ah ok, good to know! RM series was a good choice after all then for a HTPC?! biggrin.gif

Sure, it's fine, but keep in mind that the cost goes mostly to getting 80 plus gold, the fan which you never see in operation, and the modular cables. There was probably something else cheaper that would've done the job the same or better.

If you push it hard regularly, note that the second-rate capacitors and lack of active cooling at your loads means the components are kind of getting cooked. RM series is not as robust as older TX line, never mind HX or AX. That said, Corsair gives it a 5-year warranty, so have a little faith that they knew what they were doing and/or hold them to it if there are problems.

But yeah, if it's quiet and cleaned up the build, it's doing it's job, right?
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