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can the 8 pin pci-e power plug be used in 8 pin power plug on motherboard

post #1 of 10
Thread Starter 
have a asus x99-e ws/3.1 board and it has two 8 pin power plugs at the top along with a 6 pin plug under the cpu.

my corsair hx 850 watt ps has an 8 pin coming out of it. in the bag of modular plugs i have a couple more that can be plugged into in the ps. both of them are 6 pin with the additional 2 pin piece that can be added that is labeled pci-e.

can i use the standard 8 pin plug along with one of these added modular 6+2 pin pci-e plugs to additionally power the board by plugging them both in the top 2 8 pin plugs?

i then can use one of the additional 6 + 2 in the 6 pin plug that is under the cpu?

TIA
post #2 of 10
Thread Starter 
actually just spoke to corsair and they said not to use the 8 pin (6+2) in one of the top 8 pin power plugs. he thought that i was supposed to get an additional 8 pin power plug in the modular cable bag. just my luck not one in there.

so with that said i need a new power supply. one that has my two 8 pin connectors that i need. thinking the 1000watt range with a $300 or so budget. whats a good ps in that range these days?

my parts with the board:

5960x cpu (slight overclock, i dont bump voltage)
64gig ram (4x16)
sam 950 m2
6 samsung 850 pros
5 western digital 4 tera drives
980 ti zotac amp extreme
areca 1882ix
post #3 of 10
1) You never, ever plug the wrong cable into something. They aren't electrically compatible. They aren't even physically compatible, they have different shapes surrounding the pins if you bother to look.

2) You don't need the second EPS plug if the board runs fine already.
post #4 of 10
Quote:
Originally Posted by Scorpion49 View Post

1) You never, ever plug the wrong cable into something. They aren't electrically compatible. They aren't even physically compatible, they have different shapes surrounding the pins if you bother to look.

2) You don't need the second EPS plug if the board runs fine already.
This

And you dont even need an 850 watt PSU for that system, so dont bother buying a new PSU you dont need one.
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Seravee
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post #5 of 10
Thread Starter 
the board is brand new. its never been run. the owners thread of this board on this forum said you have to have both 8 pin plugs plugged in to run this board.

wanted to go a little more wattage due to ill prolly add another video card. and if i do decide to serious overclock i got a beast to back it up.

thoughts on the corsair hx1000i? actually cheaper than what i planned on spending. and i think it has the two 8 pin connectors.

btw this is a business machine for 3d, editing, designing. it makes money therefore i dont mind putting nice parts in it.
post #6 of 10
Quote:
Originally Posted by hodor View Post

thoughts on the corsair hx1000i? actually cheaper than what i planned on spending. and i think it has the two 8 pin connectors.
You dont need a new PSU so its a waste of money buying a new one.
And dont bother with the HX1000i there are better options that cost less.
Seravee
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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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Seravee
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LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
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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 #7 of 10
Thread Starter 
btw thx so much on the replies. so do you think i should try running the board with only the one 8 pin power plugged in?

if it doesnt run what could i do to get a 2nd 8 pin plug for my existing power supply?
post #8 of 10
You dont need to use the second 8 pin its only there for super extreme overclocking like if you are going to use LN2.
Again you dont need to use it and if your board turns on with only one there is zero reason to use the second one even if you had cables for it.

And forget about what you saw about that you have to use both you dont and anything that says you do is wrong.
Seravee
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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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Seravee
(27 items)
 
  
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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 #9 of 10
Thread Starter 
wow thanks so much. just hooked it up and board booted perfectly fine. appreciate the knowledge sharing and saving me $200-$300 smile.gif
post #10 of 10
Quote:
Originally Posted by hodor View Post

so do you think i should try running the board with only the one 8 pin power plugged in?

Short answer, yeah.

Long answer: yes but its not recommended. This is because your cpu can work with the power provided by the atx 8pin cpu cable but if your cpu demands more power then just once 8pin cable won't supply the demand, and then you are gonna suffer the instability by the lack of power.

Thats why the mobo comes with the option to plug 2 8pin atx. To be able to provide extra power if needed. But this depends on the type of cpu you use.
Quote:
if it doesnt run what could i do to get a 2nd 8 pin plug for my existing power supply?

No, your psu have to provide that for you.

Cheers rolleyes.gif
Edited by josepi - 11/9/15 at 11:37am
Genesis
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Genesis
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