My PC consumes 450W but I have 1000W PSU using with it , how much is my consumption ?

peaceduke · Jul 1, 2017

Hello !

I have PSU and I don't wan't to throw it away, coz it works fine , problem here is that it's too high wattage 1000W , my system only averages between 450-500
I'm worried about electricity consumption

I have X99-A motherboard, it has some switches that says that it's about power consumption

1) Am I loading 1000W on house electricity net or I'm only loading 450W (the real amount PC needs)
2) if I'm loading full 1000W , will motherboard switches help ?

raisonjohn · Jul 1, 2017

If your system only averages between 450W to 500W power draw, you're only drawing around 450W to 500W plus ~10% of that (due to efficiency/heat transfer) or about 500W to 550W on the wall.

The 1000W rating only means that your PSU can deliver up to 1000W (if you use it).

velocityg4 · Jul 1, 2017

If you use a plug a microwave into an outlet with a 15A circuit breaker. Then switch it to an outlet with a 20A circuit breaker. Does it use more power? No. It is the same concept as a PSU.

A 1000w PSU is just built well enough to survive a steady 1000W power draw without overheating. Presumably it can. If it is a low quality unit it won't.

Now efficiency can make a difference. If your 1000w isn't 80+ certified. It can be wasting a lot of electricity in conversion. If it is something like 80+ Gold. Upgrading to Platinum or Titanium will make very little difference.

peaceduke · Jul 1, 2017

raisonjohn :

thank you !

it means if you have 100000W psu you will only pay for 500W+-10% and not more, right ?

peaceduke · Jul 1, 2017

velocityg4 :

no it's corsair HX 1000W modular

velocityg4 · Jul 1, 2017

peaceduke :

That is an old unit and just 80+ standard. You could reduce waste energy a little and reduce power consumption some if you move to 80+ Gold. Even more so if you move to 80+ Platinum or Titanium. Assuming this is the old HX1000 not the new HX1000i. The HX1000i is already Platinum.

PSUs also reach maximum efficiency around 50% load. So, your current usage is optimal from a power efficiency perspective.
https://en.wikipedia.org/wiki/80_Plus

Although, if you have some incandescent light bulbs in your house. You would save a whole heck of a lot more by switching them to LED for a lot less money than a new PSU.

peaceduke · Jul 1, 2017

velocityg4 :

peaceduke :

That is an old unit and just 80+ standard. You could reduce waste energy a little and reduce power consumption some if you move to 80+ Gold. Even more so if you move to 80+ Platinum or Titanium. Assuming this is the old HX1000 not the new HX1000i. The HX1000i is already Platinum.

PSUs also reach maximum efficiency around 50% load. So, your current usage is optimal from a power efficiency perspective.
https://en.wikipedia.org/wiki/80_Plus

Although, if you have some incandescent light bulbs in your house. You would save a whole heck of a lot more by switching them to LED for a lot less money than a new PSU.

at least I will not spend 1000W if my rig only needs 450

velocityg4 · Jul 1, 2017

peaceduke :

Right, as energy savings is your goal. I'd look at around 600w to maximize cost efficiency. Since there isn't much price difference between 550w and 650w. The good Corsair and EVGA units also have a ten year warranty.

You can also recoup much of the cost selling that 1000w PSU. If you still have all the cables and pouch. The Corsair HX1000 goes for $70 to $80 used at auction.

raisonjohn · Jul 1, 2017

peaceduke :

You're welcome!

Yes, you'll only pay for what you consume.

On another note, you have a Corsair HX 1000 PSU (a very good, albeit old, PSU unit). Don't mind the 80+ certifications as they are irrelevant when determining the quality (and even the efficiency) of a PSU: https://www.hardocp.com/article/2011/10/04/80_plus_irrelevant_to_you_when_buying_psu/

I would rather keep you current PSU because as you said, you are averaging ~500W on your system and hitting 50% of a PSU's rated wattage is the point where the PSU efficiency is at its highest.

Tests have shown that loading ~500W on your Corsair HX 1000 would achieve ~86% efficiency (that's "80+ Bronze" already):
Source: https://www.hardocp.com/article/2008/04/21/corsair_hx1000w_psu_review/4

Your PSU has very good voltage regulation too (whether using, just 10%, 25%, 50%, 75%, or 100% of the PSU's power), as shown in these tests:
Source: https://www.pcper.com/reviews/Cases-and-Cooling/Corsair-HX1000W-Modular-Power-Supply-Review/Load-Regulation-Line-Regulatio

Another test showing how efficient your current HX 1000 is (almost reaching "80+ Silver"):
Source: https://www.pcper.com/reviews/Cases-and-Cooling/Corsair-HX1000W-Modular-Power-Supply-Review/Efficiency-Differential-Temper

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My PC consumes 450W but I have 1000W PSU using with it , how much is my consumption ?

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