Overclock.net › Forums › Graphics Cards › Graphics Cards - General › 1 or 2 dedicated PSU cables for dual 6 pin graphics card
New Posts  All Forums:Forum Nav:

1 or 2 dedicated PSU cables for dual 6 pin graphics card

post #1 of 6
Thread Starter 
Hi,

Just bough a new PSU and the GFX power cables have 2x 6+2pin connectors in series on each cable. Is there any advantage of using 2 dedicated cables for a GTX 670 or would there be no difference using 2 connectors off one cable to power the card.

Thanks.
post #2 of 6
Quote:
Originally Posted by Je720 View Post

Hi,

Just bough a new PSU and the GFX power cables have 2x 6+2pin connectors in series on each cable. Is there any advantage of using 2 dedicated cables for a GTX 670 or would there be no difference using 2 connectors off one cable to power the card.

Thanks.

No difference. The GTX 670 doesn't use an obscene amount of juice.
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
post #3 of 6
Thread Starter 
Thanks.

Are there any single GPU cards that might be limited by not using 2 separate power feeds?
post #4 of 6
Quote:
Originally Posted by Je720 View Post

Thanks.

Are there any single GPU cards that might be limited by not using 2 separate power feeds?

Maybe a 780 TI Classy pushing 1.5v+ under LN2 cooling.
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
post #5 of 6
Thread Starter 
lol ok fair enough biggrin.gif
post #6 of 6
Believe it or not, the difference between "just another submission" and "WOOOOOO!" on HWBot, for both my 670FTW and 680 Lightnings, came down to running completely separate PCI-E power cables. It is the difference between 1380/7200 (670) and 1501/7200 (680 Lightnings SLI), and 1498/7400 + 1591/7880.
Now that's benching, but I pulled out my Fluke DMM's and a friends 'scope and found that the power was more than 2x as "clean" from ripple, overshoot, etc.

I consider it best practice, to always spread the load across as many truly independent wires as is possibl...
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Graphics Cards - General
Overclock.net › Forums › Graphics Cards › Graphics Cards - General › 1 or 2 dedicated PSU cables for dual 6 pin graphics card