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Which way do I connect my new Gigabyte HD 7870 to the PSU?

post #1 of 6
Thread Starter 
Hi, I have a question about connecting a Gigabye HD 7870 to the PSU. My new GPU has two 6-pin power connectors on it. Does each six-pin power connector need to come from a seperate connector on a modular PSU. Or can the power come from one PSU PCIe connector and a PCIe cable with two six-pin connectors on it.



The PSU I am currently using is a SilverStone 500w 80 Plus Bronze, just the bare minimum to power this card. Don't worry I have an OCZ ZX Series 850w 80 Plus Gold Certfied PSU on the way. I am just anxious to see what this Gigabyte HD 7870 can do, as opposed to the XFX HD 6770 I have been using.

Thanks for any help on this -

Mike
Watson III
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Watson III
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Watson V
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CPUMotherboardGraphicsRAM
Intel i7 6700K ASUS Maximus VIII Gene Asus GeForce GTX 1080 Founders Edition Corsair Dominator Platinum 3000MHz C15 
Hard DriveOptical DriveCoolingCooling
Samsung 950 Pro NVMe 512GB Lite-On w/ Lite-Scribe Watercool D5 Bitspower Black Sparkle 
CoolingCoolingCoolingCooling
3 - Koolance QD3 Quiick Disconnects Hardware Labs Black Ice Nemesis 360 GTX Primochill Adavanced LTR 3/5 x 5/8 Bool Red Tubing 3 - Noctua NF-F12's Industrial 3000 RPM Push/In... 
CoolingCoolingOSMonitor
2 - Noctua NF-F12's 1500 RPM as front intake Swiftech Helix 1800 RPM PWM 120mm fan as exhaust Windows 7 Ultimate 64bit ASUS VC239H 
MonitorKeyboardPowerCase
ASUS VS228H-P HP Mechanical PS/2 Corsair AX860 Platinum CaseLabs S5 Two-Tone White/Gunmetal 
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Logitech M510 Staples Boston Acoustics Bowers & Wilkins P5 Series II Headphones 
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post #2 of 6
Silverstone wouldn't make the cable that way if it wasn't safe. Btw, 850w is probably too much if you d0n't plan on adding more cards. PSUs are their most efficient only at certain load levels.
post #3 of 6
You are good to go with the single cable with 2 connectors on it. thumb.gif

And that OCZ 850w will be great, and it'll allow you to add another card down the road if you choose to do so.
post #4 of 6
The OCZ ZX series is one of the few good PSU series OCZ has almost all other other ones apart from the ZS ZX ZT and the Fatal1ty are trash and sould be avoided at all costs

Anway its a good PSU but massive overkill for a system with a single HD 7870
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Seravee
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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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post #5 of 6
Thread Starter 
Hey guys thank you for all of your help. And yes, I do plan on doing crossfire in the near future.
Watson III
(31 items)
 
Watson V
(24 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 6700K ASUS Maximus VIII Gene Asus GeForce GTX 1080 Founders Edition Corsair Dominator Platinum 3000MHz C15 
Hard DriveOptical DriveCoolingCooling
Samsung 950 Pro NVMe 512GB Lite-On w/ Lite-Scribe Watercool D5 Bitspower Black Sparkle 
CoolingCoolingCoolingCooling
3 - Koolance QD3 Quiick Disconnects Hardware Labs Black Ice Nemesis 360 GTX Primochill Adavanced LTR 3/5 x 5/8 Bool Red Tubing 3 - Noctua NF-F12's Industrial 3000 RPM Push/In... 
CoolingCoolingOSMonitor
2 - Noctua NF-F12's 1500 RPM as front intake Swiftech Helix 1800 RPM PWM 120mm fan as exhaust Windows 7 Ultimate 64bit ASUS VC239H 
MonitorKeyboardPowerCase
ASUS VS228H-P HP Mechanical PS/2 Corsair AX860 Platinum CaseLabs S5 Two-Tone White/Gunmetal 
MouseMouse PadAudioAudio
Logitech M510 Staples Boston Acoustics Bowers & Wilkins P5 Series II Headphones 
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Watson III
(31 items)
 
Watson V
(24 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 6700K ASUS Maximus VIII Gene Asus GeForce GTX 1080 Founders Edition Corsair Dominator Platinum 3000MHz C15 
Hard DriveOptical DriveCoolingCooling
Samsung 950 Pro NVMe 512GB Lite-On w/ Lite-Scribe Watercool D5 Bitspower Black Sparkle 
CoolingCoolingCoolingCooling
3 - Koolance QD3 Quiick Disconnects Hardware Labs Black Ice Nemesis 360 GTX Primochill Adavanced LTR 3/5 x 5/8 Bool Red Tubing 3 - Noctua NF-F12's Industrial 3000 RPM Push/In... 
CoolingCoolingOSMonitor
2 - Noctua NF-F12's 1500 RPM as front intake Swiftech Helix 1800 RPM PWM 120mm fan as exhaust Windows 7 Ultimate 64bit ASUS VC239H 
MonitorKeyboardPowerCase
ASUS VS228H-P HP Mechanical PS/2 Corsair AX860 Platinum CaseLabs S5 Two-Tone White/Gunmetal 
MouseMouse PadAudioAudio
Logitech M510 Staples Boston Acoustics Bowers & Wilkins P5 Series II Headphones 
  hide details  
Reply
post #6 of 6
Even a 750 watts would have been way overkill a system with two 7870 would draw less then 600 watts from the wall maybe even less
Seravee
(27 items)
 
  
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 
AudioOtherOther
Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(27 items)
 
  
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 
AudioOtherOther
Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
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