VGA cables - how to connect

[saas1980]

I purchased a single EVGA aftermarket 1080 ti graphics card with EVGA SN G2 650W 80+ Gold PSU.

The graphics card takes an 8-pin and a 6-pin power connector. The PSU comes with 2 VGA cables and 2 ports labelled VGA1 and VGA2. Each of the 2 cables has a 6+2 connector with another 6-pin connector facing the opposite side.

Should I only use one of the VGA cables for both of the GPU's 8-pin and 6-pin draw or would I need to use both VGA ports and both PSU supplied cables? If both, what is the best method to connect to the GPU's 6 pin - using the 6-2 connector or the attached 6 pin from the second VGA cable?

 

[dudio]

That PSU only has one 12volt Rail so it wouldn't make a difference if you used both ports to feed the GPU or just the one with 2 connectors. It's really only when there are multiple rails that you would try to divide them up equally across your system.

 

[saas1980]

Is a volt rail a circuit? For example, one rail being a single power circuit?

Are there any benefits using both cables & ports (VGA1, VGA2)? Ideally I do prefer the single cable option for better/easier cable management but just curious as to whether benefits can be derived from the alternative.

 

[rhysiam]

Is a volt rail a circuit? For example, one rail being a single power circuit?

If you're interested in learning more, this looks like a decent forum post that explains a little further: http://www.jonnyguru.com/forums/showthread.php?t=3990

Are there any benefits using both cables & ports (VGA1, VGA2)? Ideally I do prefer the single cable option for better/easier cable management but just curious as to whether benefits can be derived from the alternative.

Short answer is no.

If we're going to be super-pedantic then technically using two entirely separate cables could lower the current flowing through each cable. However that's a high quality EVGA unit, you can bet the gauge (thickness) of their PCIe power cables is vastly more than enough to handle a thoroughly "normal" load like your 1080ti will be pulling. There's really no benefit at all to using separate cables. EVGA have designed that PSU with a 6 & 6+2 cable pair for exactly the use-case you want it for.