How much power do I need?

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Option58

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May 6, 2013
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So, It is just me and my computer parts choises :D

This time I wonder how many watts will I need with this configuration:

- ASUS GTX 670
- Intel i5 3570K
- 4x 4GB ram (16GB)
- 1x SSD
- 2x HDD
- 1x Blu-ray rewriter
- ASUS P8Z77-V Pro motherboard

And I was planning to buy Chieftec BPS or SPS series PSU.
And one more thing what is 80 plus bronze, and do I need more?
BPS or SPS?
 
Solution
ko888
For a system using a single GeForce GTX 670 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

For a system using two NVIDIA reference design GeForce GTX 670 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 45 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

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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 670 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

For a system using two NVIDIA reference design GeForce GTX 670 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 45 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most important 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 being attempted.

The Chieftec Nitro85+ 2 Series (BPS-750C2), 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 two GeForce GTX 670 graphics cards in 2-way SLI mode.
 
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scannall

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Jan 28, 2012
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You will pull 380 watts, so a 550 or 600 watt power supply would be fine. Go for a Seasonic. With all those expensive parts, cheaping out on your power supply doesn't make sense. At least 80 bronze. 80 gold if you can afford it.
 
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ko888

ko888

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Feb 18, 2009
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84,990


That would depend on your electrical utility's price for electricity. If the price of your electricity is expensive then it may be worth it to buy the SPS model.

What is the price difference between the BPS and SPS model? You have to look at the payback period when using the more efficient and expensive PSU and the price saving on your electrical usage charges when compared to the lower efficiency model.
 
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Option58

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May 6, 2013
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Is there any difference is parts quality aside from 80Plus between BPS and SPS?

100euro (80$) vs 120euro (100$).

PS: I would never cheap out my PSU. That is the most important part to keep my components alive.
 
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ko888

ko888

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Feb 18, 2009
16,708
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84,990


CWT (Channel Well Technology) is the OEM for both models.

The BPS is based on the high performance CWT PUQ(B) platform. The SPS is based on CWT's high end, high performance DSG platform and uses higher quality capacitors.
 
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