Overclock.net › Forums › Components › Power Supplies › How do you find out the total amps?
New Posts  All Forums:Forum Nav:

How do you find out the total amps?

post #1 of 11
Thread Starter 
I'm wondering how do you find the total amps on the 12v rails cause I thought all you did was add the rails together but that seems wrong, so how do you know?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD64 FX60 A8R32-MVP Radeon 1900XTX 512mb 2GB Corsair XMS DDR550 
Hard DriveOptical DriveOSMonitor
2x 74GB WDRaptor Raid 0 PLEXTOR Windows XP Pro SAMSUNG 214T 
KeyboardPowerCaseMouse
Logitech G15 ENERMAX EG851AX 660W Thermaltake Armor BLK Logitech G5 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD64 FX60 A8R32-MVP Radeon 1900XTX 512mb 2GB Corsair XMS DDR550 
Hard DriveOptical DriveOSMonitor
2x 74GB WDRaptor Raid 0 PLEXTOR Windows XP Pro SAMSUNG 214T 
KeyboardPowerCaseMouse
Logitech G15 ENERMAX EG851AX 660W Thermaltake Armor BLK Logitech G5 
  hide details  
Reply
post #2 of 11
look on the PSU if you have a good one it should sya the amps but there is an equation i think
    
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T ASUS M4A88TD/USB3 EVGA GTX470 8GB A-Data DDR3-1600 
Hard DriveOSMonitorKeyboard
2x 250GB WD Blue, SATA3 Windows 7 Professional 24" 1920x1080 Logitech G19 
PowerCaseMouse
650w Corsair TX Antec 900 Logitech Mx518 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T ASUS M4A88TD/USB3 EVGA GTX470 8GB A-Data DDR3-1600 
Hard DriveOSMonitorKeyboard
2x 250GB WD Blue, SATA3 Windows 7 Professional 24" 1920x1080 Logitech G19 
PowerCaseMouse
650w Corsair TX Antec 900 Logitech Mx518 
  hide details  
Reply
post #3 of 11
By law, there has to be a label on your power supply that will tell you the rating for all your rails. If you had multiple 12v rails, you'd add them together, but otherwise the 12v is the 12v.

For the PSU in your sig, your 12v rail is 34 amps nominal, 39 peak.
Morpheus Mini
(7 items)
 
  
CPUMotherboardGraphicsRAM
i7-6700T SN970 GTX 960 Crucial CT102464BF160B 
Hard DriveOSAudio
Samsung 850 Evo M.2 Windows 10 Pro MOTU Audio Express 
  hide details  
Reply
Morpheus Mini
(7 items)
 
  
CPUMotherboardGraphicsRAM
i7-6700T SN970 GTX 960 Crucial CT102464BF160B 
Hard DriveOSAudio
Samsung 850 Evo M.2 Windows 10 Pro MOTU Audio Express 
  hide details  
Reply
post #4 of 11
Thread Starter 
I always thought there was some kind of equation behind it all but thanks for the info
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD64 FX60 A8R32-MVP Radeon 1900XTX 512mb 2GB Corsair XMS DDR550 
Hard DriveOptical DriveOSMonitor
2x 74GB WDRaptor Raid 0 PLEXTOR Windows XP Pro SAMSUNG 214T 
KeyboardPowerCaseMouse
Logitech G15 ENERMAX EG851AX 660W Thermaltake Armor BLK Logitech G5 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD64 FX60 A8R32-MVP Radeon 1900XTX 512mb 2GB Corsair XMS DDR550 
Hard DriveOptical DriveOSMonitor
2x 74GB WDRaptor Raid 0 PLEXTOR Windows XP Pro SAMSUNG 214T 
KeyboardPowerCaseMouse
Logitech G15 ENERMAX EG851AX 660W Thermaltake Armor BLK Logitech G5 
  hide details  
Reply
post #5 of 11
there is smwhere
    
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T ASUS M4A88TD/USB3 EVGA GTX470 8GB A-Data DDR3-1600 
Hard DriveOSMonitorKeyboard
2x 250GB WD Blue, SATA3 Windows 7 Professional 24" 1920x1080 Logitech G19 
PowerCaseMouse
650w Corsair TX Antec 900 Logitech Mx518 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T ASUS M4A88TD/USB3 EVGA GTX470 8GB A-Data DDR3-1600 
Hard DriveOSMonitorKeyboard
2x 250GB WD Blue, SATA3 Windows 7 Professional 24" 1920x1080 Logitech G19 
PowerCaseMouse
650w Corsair TX Antec 900 Logitech Mx518 
  hide details  
Reply
post #6 of 11
watts = volts*amps

so amps = watts/volts

lets say 100watts, that could be 25v with 4 amp or 10v with 10 amp. But there is always something lost
My System
(13 items)
 
  
CPUMotherboardOSMonitor
AMD Athlon 64 3000+ GA-K8N-SLI Windows XP, Ubuntu 64 17'' CRT 
KeyboardPowerCaseMouse
Genius 500 wats A cool one :P Genius 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
AMD Athlon 64 3000+ GA-K8N-SLI Windows XP, Ubuntu 64 17'' CRT 
KeyboardPowerCaseMouse
Genius 500 wats A cool one :P Genius 
  hide details  
Reply
post #7 of 11
Quote:
Originally Posted by _Floyd_
I always thought there was some kind of equation behind it all but thanks for the info
The correct equation is:
Multipy by 12, so if you have a 34A +12V rail than it's putting 408W in the +12V rail.

For Dual Rails you have to look at the Watts that the both rails produce, for instance if you see a PSU with 17A+19A Dual Rail and both rails produce 300W than you devide that by 12 and that's how many Amps combined they actually produce. So 300/12= 25A (17A + 19A).

Enermax Liberty 620W has a Dual Rail of 22A in each but combined they produce only 36A and not 44A as many would think.
post #8 of 11
If you are looking at the Back of the Psu you will find a sticker on the Right side stating what your 12v rail is amongst other voltage info.
post #9 of 11
Quote:
Originally Posted by ogando_jose
watts = volts*amps

so amps = watts/volts

lets say 100watts, that could be 25v with 4 amp or 10v with 10 amp. But there is always something lost
Is it correct in saying, Volts is the size of the river, amps is how much water is in the river, and watts is how fast the water is moving?

roughly?
    
CPUMotherboardGraphicsRAM
FX-6300 MSI 990FXA Gaming Two XFX R9 270X Kingston HyperX Blue 8GB 1600mhz 
Hard DriveHard DriveOptical DriveCooling
Kingston SSD Western Digital Blue Generic CD/DVD Corsair H100i 
OSMonitorPowerCase
Windows 7 Professional x64 LG 34UM68-P Corsair RM750 Antec P-100 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
FX-6300 MSI 990FXA Gaming Two XFX R9 270X Kingston HyperX Blue 8GB 1600mhz 
Hard DriveHard DriveOptical DriveCooling
Kingston SSD Western Digital Blue Generic CD/DVD Corsair H100i 
OSMonitorPowerCase
Windows 7 Professional x64 LG 34UM68-P Corsair RM750 Antec P-100 
  hide details  
Reply
post #10 of 11
I dont get amps.

My PSU (the one in my sig) its suppose to be a very good PSU but it only has 18A on both 12v rails

i seen a lot cheaper PSU's and they ahve like 19A and sometimes 20A on 2 rails.
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
Opty 170 CCBWE 0550 UPMW (2.6GHZ) Asus A8N32 Deluxe ATI X1900XT 648/774 Windows XP, Vista, Linux Ubunutu 
MonitorKeyboardPowerCase
17" CRT Zboard Merc Seasonic S12-600HT 600W Antec P180 
Mouse
Logitech G7 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsOS
Opty 170 CCBWE 0550 UPMW (2.6GHZ) Asus A8N32 Deluxe ATI X1900XT 648/774 Windows XP, Vista, Linux Ubunutu 
MonitorKeyboardPowerCase
17" CRT Zboard Merc Seasonic S12-600HT 600W Antec P180 
Mouse
Logitech G7 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Power Supplies
Overclock.net › Forums › Components › Power Supplies › How do you find out the total amps?