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what uses 3v and 5v?

post #1 of 3
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In a modern PC is it not everything connected to 12v besides fancontrollers?

If I have 5850's, m4a79t with components and with 4 fans connected and controlled by mobo all these are always 12v to my understanding?

leaves the only thing to be the harddrive, having a SSD harddrive which to my understanding are couple of watts, I think they also are 5v maybe?
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I7 5820k Stock clocks Gigabyte X99 UD4 2x EVGA GTX 1080 FE SLI  Corsair 64GB (4x16GB) DDR4 2133MHz CL13 Vengean... 
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Intel 530 M.2 SSD 180GB OS + Samsung 850 EVO st... Mugen 4 push pull Win 7 64bit home prem Acer 27" XG270HU 144hz TN + LG Oled 4k TV 
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EVGA T2 1600W Fractal XL R2 CM Xornet Steelseries Qck+ 45cm black 
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post #2 of 3
A lot of small circuitry uses the +3.3V and +5V rails actually, e.g. RAM, motherboards, hard drive PCBs, etc. It's only the bigger consumption components that draw mainly on the +12V.
I suggest you read the PSU voltages article (and all the others if you're curious) after this link: http://www.overclock.net/power-suppl...ml#post9110838
post #3 of 3
IIRC the HDD controller uses 5v while the DC motors use 12v.
I think traditionally RAM was split off of the 5v line but you'd probably be better off looking something like that up.
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