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Just bought Seasonic x750 Gold; Fan question?

post #1 of 11
Thread Starter 
I bought this because it was on sale for $100 at newegg, to replace my fatal1ty 550w psu, I know it wasn't really necessary, but since the 550w was bottom mounted in my storm scout 2 case, under gaming loud, the fan starts to rattle, it was annoying. I figured this psu is 2 years old, maybe it's going bad.

I installed this x750, all is well, works great, it's also bottom mounted (fan facing down and through a fan filter) in this CMstorm scout 2, but i'm not sure if this hybrid silent thing is working right, as on desktop in idle, it'll randomly kick the fan on, and it's kind of loud, but only for a few seconds, then back to silence...ideas?
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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post #2 of 11
I bought the same psu while it was on sale. I havent experienced what your describing. Ive had it installed a week ive never heard the fan running, at idle or under load, but it probably doesnt help i get the hum of the stock h80 fans at idle and the scream of the 2 570s while folding

Maybe something is just taking a random spike of power, putting a slight load on the psu, causing the fan to kick on. Do you monitor cpu or gpu usage? It could be something is causeing usage to spike on something. Next time you notice it check if usage has gone up on you cpu or gpu at the same time the fan comes on
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post #3 of 11
Thread Starter 
Even just browsing in chrome, randomly it'll kick on at what sounds like full, or higher speed for about 5 seconds. Is your fan facing down, or is it taking air from inside the case?? Logically, heat rises, so i'm thinking, maybe if i flip the PSU, the heat could escape from the grill, if facing inside the case. I'll test this tomorrow..but, just curious how yours is oriented.

Even in gaming, it has this random pattern. I'm thinking that the heat is building up, with the way it's oriented, so it has to blast the fan every once in a while to get it out.
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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post #4 of 11
I have the same PSU, and I don't believe the fan is controlled by temperature, but rather by how much watt your system is using. Under a certain threshold the fan doesn't spin at all, then it spins faster as your system uses more electricity. Maybe the wattage sensor is broken, or your computer is requesting a spike of power for a few seconds.
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post #5 of 11
Thread Starter 
Yeah, but even when i fully load my gpu, it doesn't kick on full speed like that, just for a few seconds at a time...this worries me
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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Windows 10 Pro Ultrawide LG 34UC88-B CM Devastator 550w OCZ Fatal1ty 
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CM Storm Scout 2 Logitech G300s Lootcrate special Borderlands 2 mouse mat 
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Phenom 1090T @ 3.7 Ghz all cores Asus M4A89GTD PRO USB3 Gigabyte GTX 570 @ 900 Core 2x 4GB Corsair Vengeance DDR3 1600 @ 1333 7-7-7... 
Hard DriveOptical DriveCoolingCooling
90 GB Agility 3 (Boot) 2x500 GB WD Blue Raid 0(... None Corsair H60 Aerocool shark push pull 
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Athlon 64 3000+ MS-7139 XFX Geforce 9600 GSO 2 GB DDR 400 
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post #6 of 11
Sounds like the fan controller is defective. You should RMA it.

Also, the fan controller is temp based. What's likely happening is that it's working in the fact that it will turn on and off the fan once the temp threshold is reached, but is unable to regulate voltage to the fan to control the speed.
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post #7 of 11
Thread Starter 
It's randomly, though, too, see, it's silent for as much as 5-15 minutes, then i'll actually be able to hear it spin up, since i hear the 'whooshing' it makes, and that usually lasts for about 3 seconds, then back to silence for a period of time. sometimes it is louder than others.
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Intel core i7 4790K @ 4.4 Ghz Gigabyte z97 G1 Sniper Asus GTX 1070 Strix @ 2050 Core 2 x 8 GB Trident X 2400 MHz 
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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Windows 10 Pro Ultrawide LG 34UC88-B CM Devastator 550w OCZ Fatal1ty 
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CM Storm Scout 2 Logitech G300s Lootcrate special Borderlands 2 mouse mat 
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Phenom 1090T @ 3.7 Ghz all cores Asus M4A89GTD PRO USB3 Gigabyte GTX 570 @ 900 Core 2x 4GB Corsair Vengeance DDR3 1600 @ 1333 7-7-7... 
Hard DriveOptical DriveCoolingCooling
90 GB Agility 3 (Boot) 2x500 GB WD Blue Raid 0(... None Corsair H60 Aerocool shark push pull 
OSMonitorKeyboardPower
Win 10 Pro Samsung 46" TV Wireless Microsoft entertainment desktop Seasonic x750 Gold 
CaseMouse
Corsair Spec-01  Wireless Microsoft entertainment desktop 
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Athlon 64 3000+ MS-7139 XFX Geforce 9600 GSO 2 GB DDR 400 
Hard DriveOptical DriveCoolingOS
200 GB Seagate 2x DVD Burners 1090T Stock Cooler Windows 7 64 Bit 
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Storm Scout
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The Blackbox
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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Windows 10 Pro Ultrawide LG 34UC88-B CM Devastator 550w OCZ Fatal1ty 
CaseMouseMouse Pad
CM Storm Scout 2 Logitech G300s Lootcrate special Borderlands 2 mouse mat 
CPUMotherboardGraphicsRAM
Phenom 1090T @ 3.7 Ghz all cores Asus M4A89GTD PRO USB3 Gigabyte GTX 570 @ 900 Core 2x 4GB Corsair Vengeance DDR3 1600 @ 1333 7-7-7... 
Hard DriveOptical DriveCoolingCooling
90 GB Agility 3 (Boot) 2x500 GB WD Blue Raid 0(... None Corsair H60 Aerocool shark push pull 
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Win 10 Pro Samsung 46" TV Wireless Microsoft entertainment desktop Seasonic x750 Gold 
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Corsair Spec-01  Wireless Microsoft entertainment desktop 
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Athlon 64 3000+ MS-7139 XFX Geforce 9600 GSO 2 GB DDR 400 
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post #8 of 11
The Seasonic X series use a hybrid mode. The fan remains shut off while under a certain temperature. Once the internal temps rise above a certain temperature, it switches on until the internal temps drop below. It seems that part of the fan controller is working. What is not working (or not working well) is the voltage regulation part. When the temperature first crosses the threshold, the fan should spin up only to its minimum speed. Only if the temperature keeps rising should the fan spin up higher. In your case, it seems like it's skipping the minimum speed and going straight to full speed (or near full speed). At full speed, it would only take a few seconds to cool the power supply down.
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Optical DriveCoolingCoolingCooling
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CoolingCoolingCoolingCooling
Alphacool Repack Dual D5 Watercool Heatkiller 3.0 Alphacool GTX 690 fullcover Bitspower Big Bang Xpower II fullcover 
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Windows 8.1 64-bit Professional 3x Dell S2340 Max Keyboard Durandal CoolerMaster V1000 
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post #9 of 11
Thread Starter 
Well, i flipped it so the fan was facing inside the case, I ran OCCT for 5 minutes and then the heaven benchmark at max settings for 10 minutes, the fan didn't even spin up. o.o My 570's fans are taking air in from below, so incidentally, it could be taking in air from the PSU casing and cooling it, therefore the PSU's own fan doesn't need to turn on? odd finding..
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Intel core i7 4790K @ 4.4 Ghz Gigabyte z97 G1 Sniper Asus GTX 1070 Strix @ 2050 Core 2 x 8 GB Trident X 2400 MHz 
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256 GB Crucial M4 SSD 2x2 TB Seagate Barracuda HDD (RAID 0) Blu-ray Burner Corsair H80i 
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Windows 10 Pro Ultrawide LG 34UC88-B CM Devastator 550w OCZ Fatal1ty 
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CM Storm Scout 2 Logitech G300s Lootcrate special Borderlands 2 mouse mat 
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Phenom 1090T @ 3.7 Ghz all cores Asus M4A89GTD PRO USB3 Gigabyte GTX 570 @ 900 Core 2x 4GB Corsair Vengeance DDR3 1600 @ 1333 7-7-7... 
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90 GB Agility 3 (Boot) 2x500 GB WD Blue Raid 0(... None Corsair H60 Aerocool shark push pull 
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Win 10 Pro Samsung 46" TV Wireless Microsoft entertainment desktop Seasonic x750 Gold 
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Corsair Spec-01  Wireless Microsoft entertainment desktop 
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Athlon 64 3000+ MS-7139 XFX Geforce 9600 GSO 2 GB DDR 400 
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200 GB Seagate 2x DVD Burners 1090T Stock Cooler Windows 7 64 Bit 
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post #10 of 11
Quote:
Originally Posted by Masterchief3k View Post

Well, i flipped it so the fan was facing inside the case, I ran OCCT for 5 minutes and then the heaven benchmark at max settings for 10 minutes, the fan didn't even spin up. o.o My 570's fans are taking air in from below, so incidentally, it could be taking in air from the PSU casing and cooling it, therefore the PSU's own fan doesn't need to turn on? odd finding..

The X750 has a typical efficiency somewhere around 90%. That means at around 700 watts, which is around the general max load for your computer, your PSU would be generating 80 watts of heat. 80 watts isn't a lot, and internal operating temps of the PSU can be up to 50 C or higher.

Again though, it seems like either your fan or fan controller is defective, and in my opinion you should RMA it.
Millenium Falcon
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Core i7 4930k MSI Big Bang Xpower II EVGA GTX 690 Patriot Viper II Sector 7 
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Millenium Falcon
(24 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 4930k MSI Big Bang Xpower II EVGA GTX 690 Patriot Viper II Sector 7 
Hard DriveHard DriveHard DriveHard Drive
OCZ Deneva 2 Corsair Force 3 Maxtor Western Digital Green 
Optical DriveCoolingCoolingCooling
Samsung BD/DVD-RW Swiftech MCP655 x2 Black Ice GTX 480 Black Ice GTX 280 
CoolingCoolingCoolingCooling
Alphacool Repack Dual D5 Watercool Heatkiller 3.0 Alphacool GTX 690 fullcover Bitspower Big Bang Xpower II fullcover 
OSMonitorKeyboardPower
Windows 8.1 64-bit Professional 3x Dell S2340 Max Keyboard Durandal CoolerMaster V1000 
CaseMouseMouse PadAudio
Azza Genesis 9000B Logitech G700 Roccat Alumic Onkyo HT-S9100THX 
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Overclock.net › Forums › Components › Power Supplies › Just bought Seasonic x750 Gold; Fan question?