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Need help choosing a PSU for Gaming.

Last response: in Components
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January 20, 2013 8:35:48 PM



Hi guys,

i just bought my first gaming pc ^^

Case: Phantom 410
MotherBoard: AS Rock z77 etreme 4
CPU: intel Core i5 3570k
CPU_Cooler: Arctic Cooling Freezer 7 Pro Rev.2
GPU: Gigabyte HD 7950
RAM: 2x Kingston Technology Hyper X 4GB
HDD: Seagate Barracuda XT 2 TB
Optical-Drive: LG DVD-R/+RW GH24NS90 24x
SSD: SanDisk 128GB 2.5 inch SSD

and for the psu i made a mistake by choosing an obscure brand that have no 80+ certification, so im going to replace it with a new one, and im planning of adding a second GPU, and overclocking them two.


Corsair Gaming Series GS800, Corsair Enthusiast Series TX750

so what do you think guys of my build and what are some good PSU.

More about : choosing psu gaming

a b ) Power supply
January 20, 2013 8:49:11 PM

Hi :) 

Single 7950 ...any decent make 500

Twin 7950s ... any decent make 750

All the best Brett :) 
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a c 1167 ) Power supply
a b 4 Gaming
January 21, 2013 12:59:37 AM

For a system using a single Radeon HD 7950 graphics card AMD specifies a minimum of a 500 Watt or greater power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

For a system using two Radeon HD 7950 graphics cards in 2-way CrossFire mode AMD specifies a minimum of a 750 Watt or greater power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 45 Amps or greater and have at least four 6-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) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) will 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 you are trying to achieve.

You may find power supplies on the market that supply more than enough Wattage to run the system. However, some of them lack Sufficient Amperage capacity on the critical +12 Volt rail, which is necessary to properly power the critical components in the system (i.e. CPU and GPUs). This is the reason why graphics card manufacturers may overstate the power supply wattage, usually by at least 50 Watts, in an attempt to take into account some of those power supplies that have the weaker +12 Volt rail(s).

The Corsair GS Series GS800 ( SKU# 75-001183 / CP-9020014 ), with its maximum combined +12 Volt continuous current rating of 66 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single Radeon HD 7950 graphics card. It is also more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

The Corsair Enthusiast Series TX750 ( SKU# CMPSU-750TXV2 / 75-001309 / CP-9020042 ), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single Radeon HD 7950 graphics card. It is also more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

Choose a 750 Watt or greater PSU from brands like Antec, Corsair, Enermax, Seasonic, XFX.
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January 21, 2013 3:28:40 PM

Best answer selected by moha060.
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January 21, 2013 3:42:37 PM


Thank you so much "ko888" for all your help I really appreciate it, a special thnx to you :) 

i bought the Corsair Enthusiast Series TX750, im really happy with my new pc ^^
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