How hot can you run a PSU

Pappe · 07-24-2003, 03:53 PM

How hot can the ppowersupply be without beeing damaged. Opinions? Facts?

bigben2k · 07-24-2003, 04:08 PM

Welcome to ProCooling!

Don't let the components exceed the spec of 45 deg C. Anything else will prematurely kill the PSU, unless the unit has specifications that say otherwise.

Pappe · 07-24-2003, 05:23 PM

I'm useing an Enermax 350W that I've watercooled, but I can't find any writen limits on it. I'm running between 30 and 35 C depending on fan voltage.

bigben2k · 07-24-2003, 05:29 PM

If that's the temp of the actual components, and the hottest components, then that's fine. I believe that Enermax has the same 45 deg C spec.

Pappe · 07-26-2003, 05:55 AM

I hope it is. the sensor has its original placement near a coil of some sort so im guessing that the manufactorer knows there own components so I should be fine. Thanks for your help.

bigben2k · 07-26-2003, 09:25 AM

Yep. 45 deg C is a standard temp for most electronic (semiconductor) components. In this case, the coil is one to watch out for, after the MOSFETs. There's also a diode that you might find is epoxied to the same heatsink as the MOSFETs.

Check out BladeRunner's PSU article for some info, at www.zerofanzone.com .

SexyMF · 07-31-2003, 04:00 PM

Actually the PSU components can run VERY hot. It doesn't matter. 60C. The switching MOSFETS or the diode packs can get real hot given you may dissipate 12W-25W for the package. Junction temps are allowed to be really hot. Just like your CPU.

As a trial I put minimal cooling for my PSU. At full load (Prime95 and 3dMark2000) the HS gets a little to hot to touch but is stable.
This is a 360W Thermal take silent surepower PSU.

There is no cooling for the inductor which gets hot but will live.

OK, the image failed to attach....... deal with that later

07-24-2003, 03:53 PM	#1
Pappe Cooling Neophyte Join Date: Nov 2002 Location: Sweden Posts: 3	How hot can you run a PSU How hot can the ppowersupply be without beeing damaged. Opinions? Facts?

07-24-2003, 04:08 PM	#2
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Welcome to ProCooling! Don't let the components exceed the spec of 45 deg C. Anything else will prematurely kill the PSU, unless the unit has specifications that say otherwise. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

07-24-2003, 05:29 PM	#4
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	If that's the temp of the actual components, and the hottest components, then that's fine. I believe that Enermax has the same 45 deg C spec. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

07-26-2003, 09:25 AM	#6
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Yep. 45 deg C is a standard temp for most electronic (semiconductor) components. In this case, the coil is one to watch out for, after the MOSFETs. There's also a diode that you might find is epoxied to the same heatsink as the MOSFETs. Check out BladeRunner's PSU article for some info, at www.zerofanzone.com . __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

07-31-2003, 04:00 PM	#7
SexyMF Cooling Neophyte Join Date: Jul 2003 Location: NZ Posts: 26	Actually the PSU components can run VERY hot. It doesn't matter. 60C. The switching MOSFETS or the diode packs can get real hot given you may dissipate 12W-25W for the package. Junction temps are allowed to be really hot. Just like your CPU. As a trial I put minimal cooling for my PSU. At full load (Prime95 and 3dMark2000) the HS gets a little to hot to touch but is stable. This is a 360W Thermal take silent surepower PSU. There is no cooling for the inductor which gets hot but will live. OK, the image failed to attach....... deal with that later __________________ A7N8X Deluxe AMD 2600+ 512MB Corsair XMS DDR333

07-24-2003, 05:23 PM	#3
Pappe Cooling Neophyte Join Date: Nov 2002 Location: Sweden Posts: 3	I'm useing an Enermax 350W that I've watercooled, but I can't find any writen limits on it. I'm running between 30 and 35 C depending on fan voltage.

07-26-2003, 05:55 AM	#5
Pappe Cooling Neophyte Join Date: Nov 2002 Location: Sweden Posts: 3	I hope it is. the sensor has its original placement near a coil of some sort so im guessing that the manufactorer knows there own components so I should be fine. Thanks for your help.

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