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Is my PSU causing my gfx card coil whine?

post #1 of 5
Thread Starter 
It's either that or I have really bad luck. First my EVGA SC 780 whines so I ordered an MSI Gaming 780..... It whines TWICE as loud!!!

Is this my bad luck or could it be the psu??? The psu is a Rosewill Capstone 750W Modular only 3 weeks old. Everything seems to be working fine but I built my PC in a NZXT H2 silent case with Noctua silent fans. Hints I'm going for a silent build lol. So a loud buzz that gets louder with my fps in games "which btw I run 120hz monitor so I shoot for 120fps" is very annoying. Sub 50 I cant hear it, over 80 it starts to get loud.

I have the MSI and EVGA going back to Amazon with a new Classified on the way from Newegg. I only have 4 more days to return the PSU if that is the culprit.

Please advise TY
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PC
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CPUMotherboardGraphicsRAM
i5-6600K ASUS Z170M-PLUS MSI 970 Gaming 100M Gskill 4X4GB DDR4 3000mhz 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 512GB SSD Plextor M7VC 512GB SSD LG DVD Multi external Noctua NH-U9S + Noctua 120mm x2 
OSMonitorKeyboardPower
Win-10 BENQ 144hz 24' Logitech G710+ EVGA 550W Gold  
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Corsair SPEC-M2 Mionix 7000 Razer Sound Blaster Omni USB 
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post #2 of 5
Could be caused by the PSU or poorly made capacitors on the cards.
post #3 of 5
Thread Starter 
I'm hoping it was just bad luck with 2 cards. I really don't want to rip out the PSU. However if I should then better sooner than after I can't return.

Screw it just ripped that thing out and it's being replaced. What a pain!
Edited by batman900 - 8/27/13 at 4:36pm
PC
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5-6600K ASUS Z170M-PLUS MSI 970 Gaming 100M Gskill 4X4GB DDR4 3000mhz 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 512GB SSD Plextor M7VC 512GB SSD LG DVD Multi external Noctua NH-U9S + Noctua 120mm x2 
OSMonitorKeyboardPower
Win-10 BENQ 144hz 24' Logitech G710+ EVGA 550W Gold  
CaseMouseMouse PadAudio
Corsair SPEC-M2 Mionix 7000 Razer Sound Blaster Omni USB 
  hide details  
Reply
PC
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5-6600K ASUS Z170M-PLUS MSI 970 Gaming 100M Gskill 4X4GB DDR4 3000mhz 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 512GB SSD Plextor M7VC 512GB SSD LG DVD Multi external Noctua NH-U9S + Noctua 120mm x2 
OSMonitorKeyboardPower
Win-10 BENQ 144hz 24' Logitech G710+ EVGA 550W Gold  
CaseMouseMouse PadAudio
Corsair SPEC-M2 Mionix 7000 Razer Sound Blaster Omni USB 
  hide details  
Reply
post #4 of 5
The capstone is a good PSU, however the only PSU I've had no problems or coil whine with are Seasonic PSU's.
post #5 of 5
Both of my GTX Titans whine a little when they're under 100% load conditions with certain loads. Folding@Home causes them to whine, but BOINC with Seti@Home jobs does not. I swapped the PSU from a Corsair AX1200i to a OCZ ZX 1250W that I had on standby, and there's no difference.

For what it's worth, the whine changes pitch with the frequency of the GPU core. When it's under 100% load if I tweak the clock speed in PrecisionX a little up or down, the pitches of the whine changes. I wonder if your SC is running at a clock that's particularly sensitive to making it whine. Some people on the web have claimed the whining has been reduced or eliminated by running the card hard for a few weeks -- I've noticed no such reduction when Folding though.

I'm not worried about it personally, I've had at least a half dozen Nvidia cards that whined over the years and every one worked until I retired it. Both of mine are dead silent while playing games and sitting at the desktop or low-impact 2D duty.

Greg
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