Power Supply Question

[brucewatford]

I apologize in advance for the long post...

In terms of building a computer, I'm a noob. In late 2012, I researched components and my brother, who knows more than me, assembled my computer. Now, I would like to upgrade my graphics card. My question is this: Do I need to upgrade my power supply, too? Obviously, I only want to upgrade it if it's necessary.

Here's my current build:

Motherboard - Gigabyte GA-Z77X-UP4-TH Intel Z77
CPU - Intel Core i5-3570K BX806237i53570K Processor - Quad Core, 6MB L3 Cache, 3.40GHz (3.80GHz Max Turbo), Socket H2 (LGA1155)
RAM - CORSAIR Vengeance LP 16GB (2 x 8GB) 240-Pin DDR3
Solid State Drive - Kingston V300 240GB SSD
Hard Drive - Seagate ST500DM002 Barracuda 7200
Video Card - GeForce GTX 570 HD
Power Supply - Corsair CX600 V2 CX Series CP

I want to replace the video card with an R9-280X (I know these tend to run hot). At this point, I'm looking at the XFX brand, although I'm open to suggestions of better brands.

So, will I need a new power supply (like 850 or above)? Newegg says I do. But, the eXtreme Power Supply Calculator says I only need 474.

Any advice is appreciated.

 

[Suztera]

Whilst the CX 600 isn't a quality psu, it is enough for a R9 280X with your build.

 

[brucewatford]

Thank you!

 

[ko888]

System Power Supply Requirements for a single AMD Reference Design Radeon R9 280X
• AMD specifies a minimum of a 600 Watt or greater system power supply. (Minimum system power requirement based on a PC configured with an Intel Core i7 3.2GHz 130 Watt TDP processor.)
• the system power supply must also have a maximum combined +12 Volt continuous current rating of 37 Amps or greater
• the system power supply should also have at least one 75-Watt 6-pin and one 150-Watt 8-pin PCI Express supplementary power connectors. There are some non-reference design cards that require two 150-Watt 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

Corsair Builder Series CX600 V2 (CMPSU-600CXV2)
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating: 40 Amps <===== Sufficient
• two 150-Watt (6+2)-pin PCI Express supplementary power connectors <===== Sufficient
• Ambient Temperature Maximum (i.e. without derating): 30°C
• Modular Output Cables: No
• Passes Official Intel Haswell Compliance Test: No
• 80 PLUS Standard Efficiency Certification
• 3 Year Limited Warranty