Eiden Posted September 28, 2014 Share Posted September 28, 2014 Hi all, I've recently purchased the Corsair HX850I and it runs beautifully but upon checking the fan speed while under load it stays at 0 rpm and the PSU runs imo rather hot at 50-60c. When i change the fan to fixed in Corsair link it starts spinning and cooling the psu... is there something wrong? or is there something i need to do in order for it to start cooling automaticly? btw: My system under load pulls 300-400w Hope someone can help me :) greetz Link to comment Share on other sites More sharing options...
wytnyt Posted September 28, 2014 Share Posted September 28, 2014 chances are you haven't loaded it enough to kick the fan on,you can install the Link software to control and monitor the fan... Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted September 29, 2014 Corsair Employee Share Posted September 29, 2014 He has Link installed. That's how he turned the fan on manually. ;): 60°C isn't very hot for an internal PSU temperature. When a PSU, like the HXi, is rated at 50°C, they're talking about the ambient temperature the PSU installed within, not the temperature inside the PSU itself. Also, the fan controller uses an algorithm of load, temperature and time. So if the PSU is "hot" but not under load, the fan still isn't going to turn on. Max TDP on a 4790K is only 88W. GTX970 is only 140W. So if you take that into consideration with a 100W overhead for your other components, you're only looking at 328W under full load. You're simply not stressing the PSU out enough to make the fan spin up. In Link, what does it say your power is when running "under load"? Link to comment Share on other sites More sharing options...
Eiden Posted September 30, 2014 Author Share Posted September 30, 2014 hi thanks for the replys, when i run prime95 + 3dmark firestrike at the same time my system load gets uto 480w max but averages around 430-450. The fan of the psu does not spin up automaticly at these loads, i let the psu get to 50c while under this load and it did nothing. When i turn the fan on at 40% rpm it cools the psu down to 25-26c while under this load. Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted September 30, 2014 Corsair Employee Share Posted September 30, 2014 25 to 26°C? How cool is it in the room you're using the computer in? Link to comment Share on other sites More sharing options...
Eiden Posted October 1, 2014 Author Share Posted October 1, 2014 The room temperature here is 17-20c Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted October 1, 2014 Corsair Employee Share Posted October 1, 2014 Chilly! That's why the fan's not running. Like I said, the fan controller uses an algorithm of load, temperature and time. It's so cold and your load is only about 55 to 60% of the PSU's capability, it's not going to turn on. Link to comment Share on other sites More sharing options...
ACP Posted September 7, 2015 Share Posted September 7, 2015 does anyone know what the ambient temperature has to be for the 850i to start spinning? so far my computer is idle just on desktop and the fan is spinning 500rpm...the room temperate is 86f (30c)...the hx850i temp is 33c in corsair link Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted September 7, 2015 Corsair Employee Share Posted September 7, 2015 Wow. You bumped a one year old thread. Are you saying the fan IS spinning at 500 RPM? If so, it sounds like it already started. Or are you asking what temp it should stop spinning? Or are you asking what temp is should start spinning faster at? Link to comment Share on other sites More sharing options...
ACP Posted September 7, 2015 Share Posted September 7, 2015 no sorry what im asking is what does the temperature of the psu have to be for the fans to kick in? my ac just went out and its sweltering hot here and i just noticed the fans spin on my hx850i....all other times when my room was between 70-75f the fans never came on even under full load while gaming. Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted September 7, 2015 Corsair Employee Share Posted September 7, 2015 If all you have is that single 680SC with an 850W PSU, you'd have to have it overbearingly hot, like 50°C, in that room for that fan to start spinning faster. I kid you not. Link to comment Share on other sites More sharing options...
ACP Posted September 7, 2015 Share Posted September 7, 2015 Ok but is there a specific psu temperature where the psu fans kick in? Like I said the psu reads 33c in corsair link Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted September 7, 2015 Corsair Employee Share Posted September 7, 2015 It's hard to say because the temperature reported isn't the temperature that controls the fan. The temperature you're seeing in Link comes from a thermistor located close to the fan. The fan speed is controlled by a thermistor on the SR heatsink. Furthermore, temperature isn't the only variable used in the equation for when to turn the fan on and at what speed the fan should run. It uses a combination of load and fan speed. So now I will ask the question: Why do you want to know? Are you afraid the fan doesn't work? Does the fan work if you use the fan test button? Link to comment Share on other sites More sharing options...
ACP Posted September 7, 2015 Share Posted September 7, 2015 Oh no I was just curious ... I never seen the fan spin on idle so I was just wondering what the factors were that caused that Link to comment Share on other sites More sharing options...
red-ray Posted May 15, 2016 Share Posted May 15, 2016 It's hard to say because the temperature reported isn't the temperature that controls the fan. The temperature you're seeing in Link comes from a thermistor located close to the fan. The fan speed is controlled by a thermistor on the SR heatsink. I know the PWM controller reports two temperatures and wonder is it the one link does not report that controls the fan? Given what you have said I feel CL should report both of the HXi + RMi and all 3 of the AXi temperatures. Link to comment Share on other sites More sharing options...
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