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How many watts will this setup need?

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  • Power Consumption
  • Systems
  • Power
  • new-build
Last response: in Systems
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June 30, 2013 3:25:24 AM

Hello, it's been 6 years since I've last built a system and I can't seem to find/approximate the power consumption of my new build.
I want to carry over a be quiet! Pure Power L7 530W from my current system, so I'm hoping that's enough. Here's the new build:

CPU:
AMD FX-8350 4 GHz (with stock cooler)

MB: ASRock 990FX Extreme4

RAM: Kingston HyperX Beast DIMM XMP Kit 8GB PC3-14900U CL9-11-9 (DDR3-1866) (KHX18C9T3K2/8X)

Graphics Card: Gigabyte GeForce GTX 670 OC, 2GB GDDR5 (GV-N670OC-2GD)

HDDs:
1x Crucial m4 SDD 128GB
1x Hitachi HST727550A9E364 500GB (from a notebook, which I've upgraded with a SDD)
1x Seagate Barracuda ST3500630AS 500GB (carried over from my current system)

Optical Drive: HL-DT-ST DVDRAM GH22NS50 (carried over too)

Case: Thermaltake Soprano Dx


I'm not interested in SLI nor overclocking but might upgrade the RAM in a few years if needed.
Thanks for your answer(s)!

Jakob

More about : watts setup

June 30, 2013 3:30:04 AM

Fivefold said:
Hello, it's been 6 years since I've last built a system and I can't seem to find/approximate the power consumption of my new build.
I want to carry over a be quiet! Pure Power L7 530W from my current system, so I'm hoping that's enough. Here's the new build:

CPU:
AMD FX-8350 4 GHz (with stock cooler)

MB: ASRock 990FX Extreme4

RAM: Kingston HyperX Beast DIMM XMP Kit 8GB PC3-14900U CL9-11-9 (DDR3-1866) (KHX18C9T3K2/8X)

Graphics Card: Gigabyte GeForce GTX 670 OC, 2GB GDDR5 (GV-N670OC-2GD)

HDDs:
1x Crucial m4 SDD 128GB
1x Hitachi HST727550A9E364 500GB (from a notebook, which I've upgraded with a SDD)
1x Seagate Barracuda ST3500630AS 500GB (carried over from my current system)

Optical Drive: HL-DT-ST DVDRAM GH22NS50 (carried over too)

Case: Thermaltake Soprano Dx


I'm not interested in SLI nor overclocking but might upgrade the RAM in a few years if needed.
Thanks for your answer(s)!

Jakob

450 or 500Watt would be sufficient if you dont want sli.
be quiet! is a good brand, so you can keep your current psu
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June 30, 2013 3:45:01 AM

Your computer is in the neighborhood of 300W peak power; any good PSU from 450W up should be more than sufficient to cover that. The actual steady-state power will likely be much lower unless you overclock.
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June 30, 2013 4:06:12 AM

InvalidError said:
Your computer is in the neighborhood of 300W peak power; any good PSU from 450W up should be more than sufficient to cover that. The actual steady-state power will likely be much lower unless you overclock.


Thank you! On a side note I'm wondering though why I would need 450W if the peak usage is around 300W. That's seems to be a pretty big jump to me (I know my PSU provides even more, I'm just interested here). Is this just tolerance for safety?
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June 30, 2013 4:40:59 AM

Fivefold said:
InvalidError said:
Your computer is in the neighborhood of 300W peak power; any good PSU from 450W up should be more than sufficient to cover that. The actual steady-state power will likely be much lower unless you overclock.


Thank you! On a side note I'm wondering though why I would need 450W if the peak usage is around 300W. That's seems to be a pretty big jump to me (I know my PSU provides even more, I'm just interested here). Is this just tolerance for safety?

yes. and because PSU's under 450 watt are usually not that great quality i think (office psu's instead of gaming)

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July 2, 2013 6:15:57 AM

Fivefold said:
Thank you! On a side note I'm wondering though why I would need 450W if the peak usage is around 300W. That's seems to be a pretty big jump to me (I know my PSU provides even more, I'm just interested here). Is this just tolerance for safety?

Because only the best of the best PSUs can handle close to 100% load for a large chunk of their lifespan. Cheap units tend to self-destruct long before that. This is why 100W GPUs "require" 500W PSUs on their packaging.

PSUs usually hit their peak efficiency in the 40-70% load range. You also want to have at least a little headroom to add/upgrade stuff over time and accommodate some component aging.

My own system uses less than 200W peak including PSU losses but I ended up with a 650W PSU simply because it was the only good PSU my local PC store had in stock with long enough cables for my case+MoBo combination.
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