Gigabyte GA-Z77X-UP7 Dual 8 pin ATX Powoer Connectors Necessary?

[Steve Weldon]

I'm building a new system and the MB which is designed to excel with over clocking has 2 instead of 1 8 pin ATX power connectors in addition to the 24 pin.  Going on past history with Gigabyte they've done this in the past when extra power might be necessary for extreme over clocking, but 2 have never been necessary for stock clocks.. I can't find any documentation and I hate to ship a system without being sure.. and I just can't connect an extra because they're pinned differently than PCIe connectors and the Seasonic Platinum I spec'd to go with it only has one 8 pin CPU cable.. even my box(s) of extra cables&crap haven't turned up an extra.. so I'd have to wait to to the year year and order an extra cable only.

But if anyone has ever used for for an extended period or seen it talked about on line I'd sure appreciate  a link.  Thank you.

btw - this appears to be an exceptionally well made MB with every conceivable option other than TB.   Soon I hope.  Build quality and components are superb.. features are superb.. We'll see what happens wen I apply power..    

[tived]

I don't have the specific board, but an EVGA SR-2 which required extra 12v + PCIe power to overclock, have you had a read in the manual if this second 12v is need for normal operating spec's as in NON-Over clocked.

Using Antec 1200w here

sorry for not being of more help

Henrik

Merry Xmas and Happy New Year from Perth Western Australia

[tived]

this was all i could find

page 28
1/2) ATX_12V_2X4/ATX_12V_2X4_1/ATX (2x4 12V Power Connector and 2x12 Main Power
Connector)
With the use of the power connector, the power supply can supply enough stable power to all the components
on the motherboard. Before connecting the power connector, first make sure the power supply is turned
off and all devices are properly installed. The power connector possesses a foolproof design. Connect the
power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected,
the computer will not start.
To meet expansion requirements, it is recommended that a power supply that can withstand high
power consumption be used (500W or greater). If a power supply is used that does not provide the
required power, the result can lead to an unstable or unbootable system.

[Steve Weldon]

Thank you, that's all I could find too.  I sifted through Gigabytes FAQ's and databases and couldn't find mention of it either, other than as a sales feature showing it could handle more power for more.   

Then I sifted through every on-line review and only one mentions it specifically and it says it's there so you can hook up NOT two CPU 8 pin cables.. but two power supplies for a total of 2000 watts for extreme over clocking.  And tehre was mention of the TPX power connector when running a fourth video card.. so that's for the PCIe buss..

So.. brought up Seasonics site and it appears their Platinum 1000w has exactly the same modular pin outs as the Platinum 860 I spec'd for this system.. so it wouldn't provide a second 8 pin ATX power supply either which lends credence to the reviewers claim of it being there to support two different power supplies and not two different cables.

I checked four other power supplies I had on hand, from 850 to a server class PC Power and Cooling.. not on supports 2 8 pin ATX power connectors.  How about your Antec?

[tived]

I doubt very much that it is to run two power supplies, I'll have a look at my own board, and see how I got around it.
Sorry I can't be of more help ATM
Henrik