is my psu enough for r9 290 reference?

Solution
System Power Supply Requirements for a single AMD Reference Design Radeon R9 290
AMD specifies a minimum of a 750 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 39 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.

Total Power Supply Wattage is NOT the crucial factor in power supply...
System Power Supply Requirements for a single AMD Reference Design Radeon R9 290
AMD specifies a minimum of a 750 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 39 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.

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.

XFX TS Series 550W (P1-550S-XXB9)
OEM: Seasonic
maximum combined +12 Volt continuous current rating: 44 Amps <===== Sufficient
two 150-Watt (6+2)-pin PCI Express supplementary power connectors <===== Sufficient
Ambient Temperature Maximum (i.e. without derating): 50°C
Modular Output Cables: No
Meets Official Intel Haswell Compliance: No (Not when tested using Intel's test procedures)
• 80 PLUS BRONZE Efficiency Certification
• 5 Year Limited Warranty
 
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RAZER Gamer

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Man how do you make your answers look so neat, well written and colourful? I wish I could do that.