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Corsair RM Series 550 or Antec HCG 620M for gtx770?

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September 16, 2013 2:07:08 PM

Hello im looking for a power supply unit for the following rig:

i5 3570k
gtx770
asrock extreme4 z77

ive seen some options

Corsair RM Series 550
Antec HCG 620M
Corsair Professional HX650W

i will not be using sli yet i heard have 650 would improve the psu functioning and keep it quiter, could you give some advice please?
September 16, 2013 2:11:45 PM

A 650 watt wont be enough if you will be SLI in the future. A 750 would be enough for SLI

I would pick Corsair's New RM series. It has better quality than the HX
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a c 1167 ) Power supply
a c 540 U Graphics card
September 16, 2013 2:55:47 PM

For a system using a single GeForce GTX 770 graphics card NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 42 Amps or greater and that has at least one 6-pin and one 8-pin PCI Express supplementary power connectors. The maximum combined +12 Volt continuous current rating of 42 Amps or greater is overestimated by at least 7 Amps so any PSU with 35 Amps or greater would be sufficient.

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 Corsair RM550 (SKU# 75-001935 / CP-9020053) power supply unit, with its maximum combined +12 Volt continuous current rating of 45.8 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.

The Antec HCG M 620W (HCG-620M) power supply unit, with its maximum combined +12 Volt continuous current rating of 48 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.

The Corsair HX650 (SKU# 75-001217 / CP-9020030) power supply unit, with its maximum combined +12 Volt continuous current rating of 54 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.


For a system using two GeForce GTX 770 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 850 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 62 Amps or greater and that has at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

The Corsair RM550, Antec HCG M 620W (HCG-620M) and Corsair HX650 (SKU# 75-001217 / CP-9020030) is insufficient to power your system configuration with two GeForce GTX 770 graphics cards in 2-way SLI mode.
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September 17, 2013 12:14:58 AM

ko888 said:
For a system using a single GeForce GTX 770 graphics card NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 42 Amps or greater and that has at least one 6-pin and one 8-pin PCI Express supplementary power connectors. The maximum combined +12 Volt continuous current rating of 42 Amps or greater is overestimated by at least 7 Amps so any PSU with 35 Amps or greater would be sufficient.

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 Corsair RM550 (SKU# 75-001935 / CP-9020053) power supply unit, with its maximum combined +12 Volt continuous current rating of 45.8 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.

The Antec HCG M 620W (HCG-620M) power supply unit, with its maximum combined +12 Volt continuous current rating of 48 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.

The Corsair HX650 (SKU# 75-001217 / CP-9020030) power supply unit, with its maximum combined +12 Volt continuous current rating of 54 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 770 graphics card.


For a system using two GeForce GTX 770 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 850 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 62 Amps or greater and that has at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

The Corsair RM550, Antec HCG M 620W (HCG-620M) and Corsair HX650 (SKU# 75-001217 / CP-9020030) is insufficient to power your system configuration with two GeForce GTX 770 graphics cards in 2-way SLI mode.


thanks very much! wich one of those three would you reccomend or would you reccomend some other? could you reccomend me one for a gtx 770 sli build? Is this good for sli 770? SS-850HT
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a c 1167 ) Power supply
a c 540 U Graphics card
September 17, 2013 10:34:44 AM

For a system using a single GeForce GTX 770 graphics card the first choice would be the Corsair HX650 (SKU# 75-001217 / CP-9020030) that is based on Seasonic's G-650 (SSR-650RM Active PFC F3). The 7 Year Warranty is also an advantage.

The Corsair RM Series is new and hasn't proven itself yet so there's nothing to base a recommendation on. It's not available yet (i.e. I've read, somewhere, that the release date is around the end of October) but pre-orders are now being accepted.

The Seasonic S12D Series 850W (SS-850HT) is a discontinued model. It will work as long as your GeForce GTX 770 graphics cards don't require two 8-pin PCI Express supplementary power connectors each (e.g. MSI GTX 770 TwinFrozr Gaming, MSI GTX 770 Lightning). The SS-850HT only has two 6-pin and two (6+2)-pin PCI Express supplementary power connectors.
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