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Have some questions about which 1300W+ psu to get and PCI-E connector power pull for mining

post #1 of 3
Thread Starter 
Basically i've heard it isn't safe to run 3 290's off a motherboard without using powered risers. Is this true? I know they pull up to 75W a piece from the pci-e connector.

Like the title says I also want to get around a 1300W psu for running 2x 290x and 1 290 for mining.
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CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus z77 P8Z77-LK V Sapphire 290x Sapphire 290x 
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XSPC Raystorm CPU BLOCK EK Nickle/Acetal 290x Block  2x XSPC 240MM Radiator Windows 8.1  
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Gaming Machine
(19 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus z77 P8Z77-LK V Sapphire 290x Sapphire 290x 
RAMHard DriveHard DriveHard Drive
Gskill 4x4gb @ 1600mhz Samsung Evo 120gb Samsung Evo 120gb 2TB Seagate Game storage drive  
CoolingCoolingCoolingOS
XSPC Raystorm CPU BLOCK EK Nickle/Acetal 290x Block  2x XSPC 240MM Radiator Windows 8.1  
MonitorKeyboardPowerCase
Qnix Evolution II  Cooler Master Quickfire Rapid  Cooler Master V1000 Fractal Arc Midi R2 
MouseMouse PadAudio
Logitech G400 steel series qck Logitech G430 
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post #2 of 3
since there is two (usually 18AWG) 12 volt wires in the 24 pin connection and each wire will max out @ ~100 watts each; probably not a good idea.
loon 3.2
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loon 3.2
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7-3770K Asus P8Z77-V Pro EVGA 980TI SC+ 16Gb PNY ddr3 1866 
Hard DriveHard DriveHard DriveOptical Drive
PNY 1311 240Gb 1 TB Seagate 3 TB WD Blue DVD DVDRW+/- 
CoolingCoolingOSMonitor
EKWB P280 kit EK-VGA supremacy Win X LG 24MC57HQ-P 
KeyboardPowerCaseMouse
Ducky Zero [blues] EVGA SuperNova 750 G2 Stryker M [hammered and drilled] corsair M65 
AudioAudio
SB Recon3D Klipsch ProMedia 2.1  
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by looniam View Post

since there is two (usually 18AWG) 12 volt wires in the 24 pin connection and each wire will max out @ ~100 watts each; probably not a good idea.

thanks for the reply yeah ive decided to only run 2 cards per rig.
Gaming Machine
(19 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus z77 P8Z77-LK V Sapphire 290x Sapphire 290x 
RAMHard DriveHard DriveHard Drive
Gskill 4x4gb @ 1600mhz Samsung Evo 120gb Samsung Evo 120gb 2TB Seagate Game storage drive  
CoolingCoolingCoolingOS
XSPC Raystorm CPU BLOCK EK Nickle/Acetal 290x Block  2x XSPC 240MM Radiator Windows 8.1  
MonitorKeyboardPowerCase
Qnix Evolution II  Cooler Master Quickfire Rapid  Cooler Master V1000 Fractal Arc Midi R2 
MouseMouse PadAudio
Logitech G400 steel series qck Logitech G430 
  hide details  
Reply
Gaming Machine
(19 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus z77 P8Z77-LK V Sapphire 290x Sapphire 290x 
RAMHard DriveHard DriveHard Drive
Gskill 4x4gb @ 1600mhz Samsung Evo 120gb Samsung Evo 120gb 2TB Seagate Game storage drive  
CoolingCoolingCoolingOS
XSPC Raystorm CPU BLOCK EK Nickle/Acetal 290x Block  2x XSPC 240MM Radiator Windows 8.1  
MonitorKeyboardPowerCase
Qnix Evolution II  Cooler Master Quickfire Rapid  Cooler Master V1000 Fractal Arc Midi R2 
MouseMouse PadAudio
Logitech G400 steel series qck Logitech G430 
  hide details  
Reply
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Overclock.net › Forums › Components › Power Supplies › Have some questions about which 1300W+ psu to get and PCI-E connector power pull for mining