[SOLVED] How much power does a computer consume with a 450 Watt power supply for 24 hours?

[colat]

Suppose the computer runs 24 hours. How much power does a computer consume with a 450 Watt power supply for 24 hours?

 

[sizzling]

Impossible to answer. 450w is just the maximum wattage the psu can provide but it will only provide the system with what it needs (well roughly that). The amount used will depend on the components in the system, the workload on the pc and the efficiency of the psu.

 

[colat]

Core i9, 1tb ssd, 16 gb ram. What else components need to be named here to calculate power consumption?

 

[sizzling]

Which i9?
Do you have a gpu?
What exact psu?
What load will you put on the system? What will it be used for?

Then the best we can give you is a very rough guess.

 

[colat]

i9-9900k, no gpu, corsair VS450. It is used at home.

 

[sizzling]

Assuming no overclocking that cpu takes approximately 13 watts at idle and up to about 255w on full load. If you assume 50w for the rest of the system you have an approximate range of 63 to 305w depending on workload. Now the VS450 has a maximum efficiency of 85% so let’s assume 80% average. Therefore

Idle = 63w / 0.8 = 79w from the wall
Max load = 305w / 0.8 = 381w from the wall

This is a rough guess and the workload will determine the power needed between idle and max. I will say I would have liked to have seen a high quality psu powering a 9900k system. The VS range are the lowest quality Corsair sell.

 

[colat]

Why is Corsair VS450 a low quality power supply?

 

[TerryLaze]

Assuming no overclocking that cpu takes approximately 13 watts at idle and up to about 255w on full load. If you assume 50w for the rest of the system you have an approximate range of 63 to 305w depending on workload. Now the VS450 has a maximum efficiency of 85% so let’s assume 80% average. Therefore

Idle = 63w / 0.8 = 79w from the wall
Max load = 305w / 0.8 = 381w from the wall

This is a rough guess and the workload will determine the power needed between idle and max. I will say I would have liked to have seen a high quality psu powering a 9900k system. The VS range are the lowest quality Corsair sell.

250W is for a duration of 56 secs, unless you keep running and stopping apps all the time the power draw will drop to a constant 125W (worst case) after 56 seconds.

 

[sizzling]

Why is Corsair VS450 a low quality power supply?

It’s their most basic range https://www.tomshardware.com/reviews/corsair-vs450-power-supply,6076.html


AGAINST

• Low efficiency and overall performance
• Outdated platform
• OCP and OPP are not properly set

 

[sizzling]

250W is for a duration of 56 secs, unless you keep running and stopping apps all the time the power draw will drop to a constant 125W (worst case) after 56 seconds.

Good point

 

[colat]

Assuming no overclocking that cpu takes approximately 13 watts at idle and up to about 255w on full load. If you assume 50w for the rest of the system you have an approximate range of 63 to 305w depending on workload. Now the VS450 has a maximum efficiency of 85% so let’s assume 80% average. Therefore

Idle = 63w / 0.8 = 79w from the wall
Max load = 305w / 0.8 = 381w from the wall

This is a rough guess and the workload will determine the power needed between idle and max. I will say I would have liked to have seen a high quality psu powering a 9900k system. The VS range are the lowest quality Corsair sell.

Do we have to multiply by 24 because of 24 hours? 79x24 or 381x24?

 

[sizzling]

Do we have to multiply by 24 because of 24 hours? 79x24 or 381x24?

You would have to work out based on your use of the system where your power usage sits between idle and max. Also see TerryLaze’s point about max cpu power.

If we assume an average 150w average then

150Wh (Watt Hours) x 24hrs = 3,600Wh or 3.6KWh