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Psu rails ?

post #1 of 3
Thread Starter 
I've been reading and reviewing a lot of power supplies. I understand a decent amount about thier technology but not some specific things. This may seem like a strange question, but it seems to me almost everything pulls from the 12v rail or rails. Am I wrong about this ? What about x99 or z170 boards, in modern computing with modular psus and multi rails, does anything use the 5v or 3.3v rails ? I though maybe an ssd would use the 5v rail ? Another question I had is that if your plugging in your modular Sata or molex connectors to your psu where it says to plug them in, is that the 5v rail, is the 5v rail specifically delegated for the sata psu cable ? Are the actual modular cables where just pull from what they need, or dies each modular connection use a specific rail ?
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post #2 of 3
Single Rail vs. Multi Rail *Explained*
On PSU Voltages

More info
Phaedrus' PSU Articles
PSU index thread
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CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
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post #3 of 3
Thread Starter 
That first article isn't helpful at all, and I've read all those but the voltage link. I understand multi rail just not what was used on them. The voltage link answered my question of what gets used on what rail. I still don't know about my question of the modular plugs ? If I plug in the sata connector and only use an ssd it says hard drive circuitry. No moving parts so do ssd drives only pull from 5v rail ?
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CPUMotherboardGraphicsRAM
6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
KeyboardPowerCaseMouse
Logiech G413 Corsair rm650x Test Bench Logitech G403 
Audio
Logitech G533 
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