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VERY IMPORTANT - PSU making noise when off

WetPig1
By WetPig1
in Power Supplies
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So I got a Seasonic Focus gold 550W PSU. I built my pc and I plugged in the outlet side first, when I connected it to the PSU it make a spark sound, put it was for a split second. I removed it and plugged PSU first then outlet, no problem. 

 I powered my PC and it worked. I shut it off. I also shut the PSU off!!!

 

 When I put my ear next to the PSU I can hear a noice, rattling of sorts, it is very silent, but the PSU is OFF. I have no idea what to do. I might return it.

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First off, always connect the load side first (plug cable into the PSU before the wall) - that spark was "normal" and wouldn't hurt anything.

 

If there's a sound when the unit is off, it could be a problem, or might be normal.  I use a Seasonic 750 Focus Gold, but never had any noise when off that I noticed.  Many electronic components can make noise when the unit is powered off though.  Might just be the input transformer whine you're hearing.  Can you get a video of the noise?

 

 

Main Rig:

Case: Lian Li Lancool Mesh RGB

CPU: Ryzen 5 3600 

Cooler: CoolerMaster MasterLiquid 240

MB: MSI B550 Gaming Pro Carbon 

Ram: Gskill DDR4 3600 x 32GB 

GPU: Asus Arez Strix Vega 64 OC

PS: Seasonic FOCUS Gold Plus Series SSR-750FX

SSD1: Crucial P1 1TB NVME

SSD2: Adata SU800 512gb M.2 Sata

HDD: Hitatchi 2tb 7200RPM + 3x 2TB WD Passport USB 3.0

Monitors: AOC C24G1

Keyboard: Cheap Blue Knockoff Mechanical

Mouse: Uhuru Gaming Mouse
OS: Pop! 21.04



Current Vintage Equipment:  Please ask me about it, I love to talk old tech!
IBM Thinkpad 390, IBM Aptiva A12, IBM PS/2 Model 25-004.  Compaq Contura 4/25C, Presario 7596
Asus P5A-B Socket 7 Box, Tandy 1000RLX-HD "B" & 1200-2FD, VIC20, Zenith ZFL-181-93, Packard Bell 300SX.

Apple II/gs, Mac Plus x2, Mac SE x2, Performa 450

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8 minutes ago, WetPig1 said:

I also shut the PSU off!!!

don't use the button on the back of the PSU in daily use, they arent meant to work like that and could break.

 

9 minutes ago, WetPig1 said:

 

 When I put my ear next to the PSU I can hear a noice, rattling of sorts, it is very silent, but the PSU is OFF. I have no idea what to do. I might return it.

could be a fan that hasnt stopped yet, or the PSU somehow discharging (something in the PC still powered on, say an LED)

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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1 minute ago, zombienerd said:

First off, always connect the load side first (plug cable into the PSU before the wall) - that spark was "normal" and wouldn't hurt anything.

 

If there's a sound when the unit is off, it could be a problem, or might be normal.  I use a Seasonic 750 Focus Gold, but never had any noise when off that I noticed.  Many electronic components can make noise when the unit is powered off though.  Might just be the input transformer whine you're hearing.  Can you get a video of the noise?

 

 

I can't right now, it is incredibly silent, I need to get about 5in from it to even hear it. It sounds kinda like a refrigerator, high frequency sound.

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Just now, WetPig1 said:

I can't right now, it is incredibly silent, I need to get about 5in from it to even hear it. It sounds kinda like a refrigerator, high frequency sound.

I'm going to guess that's normal transformer whine, but without hearing it, I can't say for certain.

Main Rig:

Case: Lian Li Lancool Mesh RGB

CPU: Ryzen 5 3600 

Cooler: CoolerMaster MasterLiquid 240

MB: MSI B550 Gaming Pro Carbon 

Ram: Gskill DDR4 3600 x 32GB 

GPU: Asus Arez Strix Vega 64 OC

PS: Seasonic FOCUS Gold Plus Series SSR-750FX

SSD1: Crucial P1 1TB NVME

SSD2: Adata SU800 512gb M.2 Sata

HDD: Hitatchi 2tb 7200RPM + 3x 2TB WD Passport USB 3.0

Monitors: AOC C24G1

Keyboard: Cheap Blue Knockoff Mechanical

Mouse: Uhuru Gaming Mouse
OS: Pop! 21.04



Current Vintage Equipment:  Please ask me about it, I love to talk old tech!
IBM Thinkpad 390, IBM Aptiva A12, IBM PS/2 Model 25-004.  Compaq Contura 4/25C, Presario 7596
Asus P5A-B Socket 7 Box, Tandy 1000RLX-HD "B" & 1200-2FD, VIC20, Zenith ZFL-181-93, Packard Bell 300SX.

Apple II/gs, Mac Plus x2, Mac SE x2, Performa 450

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1 minute ago, Jurrunio said:

don't use the button on the back of the PSU in daily use, they arent meant to work like that and could break.

 

could be a fan that hasnt stopped yet, or the PSU somehow discharging (something in the PC still powered on, say an LED)

I just got the parts, turned it off as I'm not planning to finish it till tomorrow. The sound was there for 20 minutes before I plugged it off the outlet.

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Just now, WetPig1 said:

I just got the parts, turned it off as I'm not planning to finish it till tomorrow. The sound was there for 20 minutes before I plugged it off the outlet.

big capacitors can take that long to discharge if there is something draining it (say a USB device)

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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1 minute ago, zombienerd said:

I'm going to guess that's normal transformer whine, but without hearing it, I can't say for certain.

Is that a problem, this is the first pc I have built. My last one is a 11 year old pc, PSU wasn't making sounds I think.

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1 minute ago, Jurrunio said:

big capacitors can take that long to discharge if there is something draining it (say a USB device)

Hope it isn't a problem, I'll test tomorrow,  I did power the PC and everything worked great - it was just a test, nothing was plugged into it.

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6 minutes ago, WetPig1 said:

Is that a problem, this is the first pc I have built. My last one is a 11 year old pc, PSU wasn't making sounds I think.

Transformer whine would not be a problem.  It would be considered normal behavior.  IF that is what the noise is.

Main Rig:

Case: Lian Li Lancool Mesh RGB

CPU: Ryzen 5 3600 

Cooler: CoolerMaster MasterLiquid 240

MB: MSI B550 Gaming Pro Carbon 

Ram: Gskill DDR4 3600 x 32GB 

GPU: Asus Arez Strix Vega 64 OC

PS: Seasonic FOCUS Gold Plus Series SSR-750FX

SSD1: Crucial P1 1TB NVME

SSD2: Adata SU800 512gb M.2 Sata

HDD: Hitatchi 2tb 7200RPM + 3x 2TB WD Passport USB 3.0

Monitors: AOC C24G1

Keyboard: Cheap Blue Knockoff Mechanical

Mouse: Uhuru Gaming Mouse
OS: Pop! 21.04



Current Vintage Equipment:  Please ask me about it, I love to talk old tech!
IBM Thinkpad 390, IBM Aptiva A12, IBM PS/2 Model 25-004.  Compaq Contura 4/25C, Presario 7596
Asus P5A-B Socket 7 Box, Tandy 1000RLX-HD "B" & 1200-2FD, VIC20, Zenith ZFL-181-93, Packard Bell 300SX.

Apple II/gs, Mac Plus x2, Mac SE x2, Performa 450

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17 minutes ago, zombienerd said:

Transformer whine would not be a problem.  It would be considered normal behavior.  IF that is what the noise is.

The noise is incredibly silent, will change the cord tommorow and test it to see what happens

 

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I'm sorry.  You started this post with "VERY IMPORTANT" and I fail to see what is "very important" here.

 

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