PSU for Custom PC Build

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tonyhanch

tonyhanch

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Jun 20, 2015
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I have a Cooler Master GX 650W power supply and I was wondering if it would suffice for the following system I was gonna build, or if I would need something more powerful.

Motherboard: ASRock P55DE3
CPU: i5 750 overclocked to 4.2 Ghz
Fan: Cooler Master 212 Evo
RAM: Crucial Ballistix Tactical 1.35v (2x4GB) 8GB
GPU: Sapphire AMD R9 290 Tri-X OC


 
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ko888
System Power Supply Requirements for a single Sapphire R9 290 4GB Tri-X OC
• Sapphire 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 45 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...
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eatmypie

eatmypie

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Sep 12, 2013
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I'm guessing your power supply is a few years old? While most of the time 650w would be enough, you need to put into consideration the rails not being as efficient or able to output as much continuous power as they used to be. So you probably would need to buy a new 650w power supply to be safe or go for the 970 unless you have that gpu already.
 
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tonyhanch

tonyhanch

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Jun 20, 2015
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Actually, I got it last year. But you think it would work? What if I have a couple of 12v fans mounted on the inside of the case, running off of the motherboard?
 
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ko888

ko888

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Feb 18, 2009
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System Power Supply Requirements for a single Sapphire R9 290 4GB Tri-X OC
• Sapphire 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 45 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.

Cooler Master GX 650W (RS-650-ACAA-D3)
• OEM: Enhance Electronics
• maximum combined +12 Volt continuous current rating: 52 Amps <===== Sufficient
• two 150-Watt (6+2)-pin PCI Express supplementary power connectors <===== Sufficient
• Ambient Temperature Maximum (i.e. without derating): 40°C
• Modular Output Cables: No
• Meets Official Intel Haswell Compliance: No
• 80 PLUS BRONZE Efficiency Certification
• 5 Year Limited Warranty

No need for a PSU upgrade. You should be fine.
 
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