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How much PSU Wattage do i need?

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July 5, 2013 8:13:12 AM

Im thinking of running two HD 7950s in my rig, how much PSU wattage do i need?

My other components:

Intel i7-4770 Haswell (not overclocked)
MSI Z87-GD65 Gaming
CoolerMaster Seidon 120m liquid cooler
8GB G.Skill RipJaws X
2TB Seagate Barracuda

Thanks!

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a c 1167 ) Power supply
a c 540 U Graphics card
July 5, 2013 8:58:37 AM

For a system using two AMD reference design Radeon HD 7950 (non-Boost Edition) graphics cards in 2-way CrossFire mode AMD specifies a minimum of a 750 Watt or greater system 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) 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.
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a b ) Power supply
a b U Graphics card
July 5, 2013 10:13:46 AM

Check out my guide for help on wattage requirements and PSU selection. Check out PCPartPicker for exact info on wattage. Just go to system build , add your selected parts and check the estimated wattage. Get a PSU 100-300W above your needs depending on your requirements and budget.
ATX12v PSU Guide
Last updated on 27th July 2013. Will be frequently updating this guide until I find it time to write a new one. Hello Buddies and Builders , This guide is to solve those "Will my PSU be enough ?" or "Need PSU Help ?" questions on the forum. Before... See full content
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a c 280 ) Power supply
a c 112 U Graphics card
July 5, 2013 10:54:50 AM

Firewater21 said:
Im thinking of running two HD 7950s in my rig, how much PSU wattage do i need?

My other components:

Intel i7-4770 Haswell (not overclocked)
MSI Z87-GD65 Gaming
CoolerMaster Seidon 120m liquid cooler
8GB G.Skill RipJaws X
2TB Seagate Barracuda

Thanks!


Hi - Any quality 750w PSU will do the job & allow you to overclock, there also
some 650's that will suffice(have 4 pcie connectors & sufficient +12v amps)

Where are you located? and what's your budget for a PSU?

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