Nema to veze sa napajanjem.
Hajde da sam naveo neciji tekst sa foruma ili tudje iskustvo (ima ih malo more, pokusaj sa "psu related gpu coil whine" i dobices veoma lijepo,detaljno objasnjenje odnosa PSU/maticna ploca/GPU sto se regulacije napona pod razlicitim opterecenjima tice . Kao sto je recimo ovaj sa EVGA foruma :
"Filtered Pulse Width Modulation is what regulates the voltage. Your PSU, GPU, and motherboard (providing individual power to the CPU, DRAM, and chipset) all use PWM.
The "coil whine" will not necessarily be coming from any particular source; it could come from any of those sources. But, the GPU typically is the source of noise because it is low voltage (around 1 volt) at high wattage which equates to higher amperage than the other PWM sources.
The PSU is obviously pushing out the same combined wattage to the motherboard, GPU, and other hardware. But the PSU is providing power at higher voltage (primarily 5v and 12v) which equates to lower amperage flowing through the PWM voltage regulation filters in the PSU.
Inductors in the voltage regulator circuitry are coils of wire which are part of the output filtering which vibrate due to pulsating magnetic fields generated as current flows through them. You can hear them vibrate like a speaker if they do at a high enough amplitude.
Preventing coil whine is ultimately up to the manufacturer when they design the hardware. They can either use higher quality components which are less likely to make audible noise, or add more power phases so that less current is flowing through each specific phase thereby reducing the amplitude of the sound.
Interestingly, since the PSU is providing PWM regulated and filtered output to every part of your computer, the CPU, DRAM, chipset, and GPU effectively have two layers of PWM voltage regulation to them. A low quality PSU with "noisy" voltage output (poorly filtered), can aggrevate the PWM voltage regulators on the motherboard and GPU. Coil whine on a GPU can sometimes be dramatically reduced by purchasing a better PSU which has more stable voltage output." Ako ti nije mrsko,proguglaj malo i sam ,mozes naci jos detaljnije . Los mi je net na mobu i treba godina da loaduje i stranicu obicnog teksta,pa sam poslao samo ono sto imam bookmarkovano .) nego sam pisao o svom licnom iskustvu koje se ponovilo sa bar 3 kartice , isti model , razlicit proizvodjac i dva napajanja sa svakom od njih . Svaka kartica je imala coil whine sa jednim napajanjem (i ne samo graficka kartica,nego se slican visokotonski zvuk cuo i iz podrucja maticne ploce koje regulise napon procesora sa jednim od tih napajanja) . Dakle "nema veze sa napajanjem" bez argumenata je nekako "supalj" odgovor .