Connecting EVGA GeForce GTX 970 to PSU Question

[lshs9903]

Hey everyone,
Thank you in advance for any help you can provide. This is my first build so I am being a overly careful. I'll be building this Friday, and trying to work out every detail prior to when I start. I also apologize if this is a really dumb question.

After some help from the boards here, this is the build I settled on:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor ($299.99 @ Newegg)
CPU Cooler: Noctua NH-D15 82.5 CFM CPU Cooler ($92.95 @ Mwave)
Motherboard: Gigabyte GA-Z97X-Gaming 5 ATX LGA1150 Motherboard ($134.99 @ Amazon)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Drive ($79.99 @ Micro Center)
Storage: Seagate Barracuda XT 2TB 3.5" 7200RPM Internal Hard Drive ($120.39 @ Amazon)
Video Card: EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Video Card ($334.99 @ SuperBiiz)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99 @ Amazon)
Power Supply: EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ NCIX US)
Optical Drive: Asus BW-16D1HT Blu-Ray/DVD/CD Writer ($64.49 @ SuperBiiz)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($90.26 @ OutletPC)
Wireless Network Adapter: TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($34.00 @ SuperBiiz)
Total: $1499.02
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-11-25 18:14 EST-0500

Now the PSU comes with 4x PCI-E 6+2 Pin and has 4 VGA slots. It looks like the card has two slots that match up with the 6 from the 6+2. Do I need the use VGA1 and VGA2, and only connect the 6s and leave the 2s unconnected?

 

[gilbadon]

Yes, leave the the extra two pins disconnected but you can connect the other end into the power supply at any VGA port. It does not matter. A little knowledge on voltage rails...

A voltage rail is the SINGLE voltage used to supply components. A power supply may have many rails. One for 12V, one for 5v, one for 3.3V, and so on. The reason there are so many wires for a power supply is not because there are a ton of different places the voltage is coming from, but because sending voltage through one wire would require a huge guage wire to allow the current. So PSU manufacturers split the rails into many pieces to reduce current.

Why is this important? Because it just says that two ports, if using the same rails (such as two VGA ports) will always provide the same kind of voltage and current and are interchangeable. Use whatever one gives you best cable management.

 

[lshs9903]

Wow thank you! Any additional knowledge I can pick up I'm always happy for!