Power Supply ok??

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brian84ar

Honorable
Nov 18, 2013
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I have this power supply Antec EA 650
I bought it two years ago and it is working great.
I was thinking to upgrade my computer in the next days (waiting to see if i can catch good deals on Black Friday) to this:

Intel Xeon 3.3 e3-1230v2
ASRock Z77 Pro4
G.SKILL Ripjaws X Series 8GB
MSI R9 270X GAMING 2G Radeon R9 270X
WD 1GB Blue

But some ppl in this forum told me to go for an i5 and better graphic card like a 280x....
From what i read the 270x will be ok with my PS but it will not be enough for a 280x because of watts and 12v (in this version of ea650 +12V1@22A, +12V2@22A, +12V3@25A)

should i get a new power supply or mine will be ok???
if there s only one video card 12v1 will be 22a or i should add v1+v2+v3 and make 12v69a???

Also i might go for i7-3770 instead i5 or xeon....

thanks in advance!
 
Solution
ko888
For a system using a single MSI R9 280X TWIN FROZR GAMING OC EDITION 3 GB graphics card a minimum of a 600 Watt or greater system power supply is recommended. The power supply should also have a maximum combined +12 Volt continuous current rating of 42 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.

For a system using a single AMD Reference Design Radeon R9 270X graphics card AMD specifies a minimum of a 500 Watt or greater system 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...
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ko888

ko888

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Feb 18, 2009
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For a system using a single MSI R9 280X TWIN FROZR GAMING OC EDITION 3 GB graphics card a minimum of a 600 Watt or greater system power supply is recommended. The power supply should also have a maximum combined +12 Volt continuous current rating of 42 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.

For a system using a single AMD Reference Design Radeon R9 270X graphics card AMD specifies a minimum of a 500 Watt or greater system 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.

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.

The Antec EarthWatts Series 650W (EA 650) power supply unit, with its maximum combined +12 Volt continuous current rating of 45 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with a single MSI R9 280X TWIN FROZR GAMING OC EDITION 3 GB graphics card. It is also more than sufficient to power your system configuration with a single Radeon R9 270X graphics card.

Since both PCI Express supplementary power connectors are on +12V3 the maximum current draw on that rail is limited to 25 Amps. You'll only reach a 25 Amp current draw with the MSI R9 280X TWIN FROZR GAMING OC EDITION 3 GB if you run FurMark stability testing. During gaming the current draw is around 19 Amps peak. The OCP (Over Current Protection) Set Point is 33 Amps. The MSI R9 280X TWIN FROZR GAMING OC EDITION 3 GB doesn't exceed 27.5 Amps so there should be no false triggering of that protection circuit.
 
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