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Pretty soon I'm gonna buy a new GPU(Sapphire R7-265 2GB GDDR5 Dual-X)
I'm having trouble knowing what is the right PSU or what is the right Wattage for the GPU

CPU: Intel Core i7-4790K @ 4.0GHz | COOLING: Corsair H100i Liquid Cooler | MOTHERBOARD: ASUS Maximus VII Formula ATX | MEMORY: Corsair Vengeance Pro Series 16GB (2 x 8) DDR3-1866 | STORAGE: Intel 730 Series 480GB SSD + Seagate Barracuda 3TB HDD | PSU: Corsair AX860i 80+ Platinum | GPU: ASUS GeForce GTX 780Ti DirectCU II (2-Way SLI) | CASE: Phanteks Enthoo Luxe (Black) | DISPLAY: ASUS PB278Q 27.0" (2560 x 1440) | KEYBOARD: Razer BlackWidow Chroma | MOUSE: Razer Deathadder Chroma | SOUND: Logitech Z906 5.1 Speakers / Razer Kraken Chroma | OS: Microsoft Windows 8.1 (64-bit)

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Not to be rude and all .. but can you be more specific on what type of PSU like what brand?  :) it would sure help me a lot 

CPU: Intel Core i7-4790K @ 4.0GHz | COOLING: Corsair H100i Liquid Cooler | MOTHERBOARD: ASUS Maximus VII Formula ATX | MEMORY: Corsair Vengeance Pro Series 16GB (2 x 8) DDR3-1866 | STORAGE: Intel 730 Series 480GB SSD + Seagate Barracuda 3TB HDD | PSU: Corsair AX860i 80+ Platinum | GPU: ASUS GeForce GTX 780Ti DirectCU II (2-Way SLI) | CASE: Phanteks Enthoo Luxe (Black) | DISPLAY: ASUS PB278Q 27.0" (2560 x 1440) | KEYBOARD: Razer BlackWidow Chroma | MOUSE: Razer Deathadder Chroma | SOUND: Logitech Z906 5.1 Speakers / Razer Kraken Chroma | OS: Microsoft Windows 8.1 (64-bit)

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I'd go with a 650W PSU just for that extra headroom in case I upgrade later on and a 500W psu won't cut it.

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Look up extreme PSU calc and put your system in.

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So for Budgetwise 500W PSU
for Future Plans on Upgrades 650W?

CPU: Intel Core i7-4790K @ 4.0GHz | COOLING: Corsair H100i Liquid Cooler | MOTHERBOARD: ASUS Maximus VII Formula ATX | MEMORY: Corsair Vengeance Pro Series 16GB (2 x 8) DDR3-1866 | STORAGE: Intel 730 Series 480GB SSD + Seagate Barracuda 3TB HDD | PSU: Corsair AX860i 80+ Platinum | GPU: ASUS GeForce GTX 780Ti DirectCU II (2-Way SLI) | CASE: Phanteks Enthoo Luxe (Black) | DISPLAY: ASUS PB278Q 27.0" (2560 x 1440) | KEYBOARD: Razer BlackWidow Chroma | MOUSE: Razer Deathadder Chroma | SOUND: Logitech Z906 5.1 Speakers / Razer Kraken Chroma | OS: Microsoft Windows 8.1 (64-bit)

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500 watts should be good enough. This one is pretty good http://www.amazon.com/gp/aw/d/B00DGHKK7M?pc_redir=1408079112&robot_redir=1

 

Wat. It's a good power supply...

 

Why??

 

http://www.legitreviews.com/evga-500b-500w-power-supply-review_122110

 

The OEM behind the creation of the EVGA 500B Bronze is...Heroichi [HEC].
...maximum ripple [for the +12v] we recorded being 64mV...
...the components are of mediocre quality...

 

 

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=351

 

Which, if you ask me, is kind of mediocre....

Over on the voltage readings, it's a bit of a mixed bag.

The 12V rail does not share that kind of awesomeness, however, and is just holding around 65mV. Too far from the 50mV mark to let me call it very good, and too close to the 75mV mark I call merely average.

... tier 2 caps...

 

http://www.hardocp.com/article/2013/12/16/evga_500b_500w_power_supply_review/1#.U_A4VKMg-Uk

 

This topology is combined with some decided less than top-shelf components including capacitors from CapXon and Teapo as well as a fan from Shenzhen Dongweifeng Electronic Technologies Co.

...it seems that these units are borderline 80 Plus Bronze...

While the 12v results for this unit are pushing ~50% of the ATX12v specification limit...

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So for Budgetwise 500W PSU

for Future Plans on Upgrades 650W?

What upgrades? Adding another 265 makes no sense. 450W is easily enough for overclocking both an R7 265 and 5600K. Adding fans and HDDs doesn't add very much at all. Do you see yourself upgrading to a 780/Ti or R9 290/X?

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