Power Requirements for X4 750k and r9 270

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Xicer99

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What do you think are the requirments for a x4 750k and a Gigabyte R9 270? I was thinking to go with a XFX ProSeries Core Edition 550W, is that enough?
 
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ko888


For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

An exception is the MSI GeForce GTX 660 HAWK 2 GB. It requires two 6-pin PCI Express supplementary power connectors.
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ko888

ko888

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For a system using a single Radeon R9 270 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 29 Amps or greater and have at least one 6-pin PCI Express supplementary power connector.

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 ProSeries Core Edition 550W
• OEM: Seasonic
• maximum combined +12 Volt continuous current rating of 44 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors
• Haswell Compatible: No
• 80 PLUS BRONZE Efficiency Certification
• 5 Year Limited Warranty

It's way more than sufficient for your system configuration.
 
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Xicer99

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Can i then use a the same power supply but a 450w?
The 450w has a 34 amps of +12 volt rail and that's enough for r9 270 but is it also enough for a x4 750k?
 
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ko888

ko888

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The GIGABYTE GV-R927OC-2GD requires two 6-pin PCI Express supplementary power connectors.

The currently available XFX Pro Series 450W Full Wired Edition V2 (Bronze) - P1-450S-X2B9 power supply only has one (6+2)-pin PCI Express supplementary power connector.

If you can find the Discontinued model, XFX PRO 450W (P1-450S-XXB9 / XPS-450W-SEW), this one came with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors.
 
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Xicer99

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I will get the 450w v2 model, but do you think it's gonna be enough for the 270 and the 750k?
 
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ko888

ko888

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The 450w v2 model is going to be short by one PCI Express supplementary power connector.

The graphics card model, you've chosen, requires two.

Yes, the XFX 450W is electrically sufficient.
 
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Xicer99

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Allrighty but can i then use a GTX 660 with this PSU and CPU?
 
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ko888

ko888

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Feb 18, 2009
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For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

An exception is the MSI GeForce GTX 660 HAWK 2 GB. It requires two 6-pin PCI Express supplementary power connectors.
 
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Xicer99

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Thanks dude!
 
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