Performance
Power
The card has One 8-pin (150 watts) and one 6-pin (75 watts) plus 75 watts thru the slot so the delivery system can carry 300 watts of power. The max measured capacity however is 220 wats in the TPU test, the test characteristics being as follows:
"Maximum: Furmark Stability Test at 1280x1024, 0xAA. This results in a very high no-game power-consumption that
can typically be reached only with stress-testing applications. We report the highest single reading after a short startup period. Initial bursts during startup are not included, as they are too short to be relevant. "
AIB cards are capable of delivering more power, especially when overclocked. but as we don't know which one you are looking at, can not make a determination. Lets look at an example:
http://www.guru3d.com/articles_pages/msi_geforce_gtx_770_gaming_review,5.html
They measured 197 watts and wrote:
"Here is Guru3D's power supply recommendation:
- GeForce GTX 770 - On your average system the card requires you to have a 550 Watt power supply unit.
- GeForce GTX 770 2-way SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
- GeForce GTX 770 3-way SLI - On your average system the cards require you to have a 1000 Watt power supply unit as minimum"
Now we have to examine the impact of overclocking ... a few pages later in that review, we see the card can have its power limit raised by 11%... so 197 x 1.11 = 219 watts... so that implies 22 extra watts. But if not OCing the card and given your CPU, a 550 should be fine. That being said, the VP series was Antec's Builder line ... in other words .... low end of low budget. Id be more comfy w/ a Seasonic S12 520 / Antec HCG 520 than I would with an Antec VP550. But again. don't see a real issue here with your other componentry.
The single vs multiple rail thing is not a real issue 99.9% of the time but internet posters just won't let t go
http://www.jonnyguru.com/forums/showthread.php?t=3990
"The bottom line is, for 99% of the folks out there single vs. multiple +12V rails is a NON ISSUE. It's something that has been hyped up by marketing folks on BOTH SIDES of the fence. Too often we see mis-prioritized requests for PSU advice: Asking "what single +12V rail PSU should I get" when the person isn't even running SLI! Unless you're running a plethora of Peltiers in your machine, it should be a non-issue assuming that the PSU has all of the connectors your machine requires and there are no need for "splitters" (see Example 1 in the previous bullet point). "