Power Suply question

[Dr.Bee]

Hi , I have a question what kind of power supply shold I get for a gforce gtx 1050 ti from Asus and a i5 9400 ?

[Eigenvektor]

The GTX 1050 Ti should draw less than 80 Watt at max, the i5 9400 should be in the same ballpark. You'll need additional power for your motherboard, SSD, fans etc. So you're maybe looking at something around 200-250 Watt in total. So I suppose a 300-350 Watt PSU should be on the safe side.

 

Essentially, do some research into your components, how much power they draw under load and then add some safety margins.

 

You should keep in mind that the closer you play it, the more limited you are in terms of future upgrades. You also don't want to max out your power supply because it will lose some performance as it ages so you could run into issues later on if your PSU is on the weaker side.

[seon123]

Depends on where you're buying from. The availability and pricing depends varies by country.

3 minutes ago, Eigenvektor said:

So you're maybe looking at something around 200-250 Watt in total

Good luck getting a system with a 1050 Ti and 9400 to actually draw 200W under any load.

3 minutes ago, Eigenvektor said:

You also don't want to max out your power supply because it will lose some performance as it ages so you could run into issues later on if your PSU is on the weaker side.

PSUs are rated for continuous power. Do you know what "continuous" means?

[Eigenvektor]

2 minutes ago, seon123 said:

Good luck getting a system with a 1050 Ti and 9400 to actually draw 200W under any load.

That is somewhat ambiguous. Will it draw less or more? I'm trying to err on the safe side, because as I said, motherboard, SSD, case fans etc. are all going to draw power too.

3 minutes ago, seon123 said:

PSUs are rated for continuous power. Do you know what "continuous" means?

Not sure what you're trying to get at. It means the PSU will be able to supply it's rated wattage under sustained load for a long period of time (unlike peak power, which is only available for a limited amount of time).

 

But the maximum wattage it can supply will drop as it ages. Especially if you get cheaper brand, which may not even reach its advertised wattage to begin with.

[seon123]

18 minutes ago, Eigenvektor said:

That is somewhat ambiguous. Will it draw less or more? I'm trying to err on the safe side, because as I said, motherboard, SSD, case fans etc. are all going to draw power too.

Even with higher end systems, you'll see that the power draw during gaming is about GPU TDP + 70W. As the 1050 Ti is a 75W card, and the 9400 is 65W CPU, it will be well below 200W.

19 minutes ago, Eigenvektor said:

Not sure what you're trying to get at. It means the PSU will be able to supply it's rated wattage under sustained load for a long period of time (unlike peak power, which is only available for a limited amount of time).

 

But the maximum wattage it can supply will drop as it ages. Especially if you get cheaper brand, which may not even reach its advertised wattage to begin with.

Do you seriously think that the PSU's rated wattage is the actual maximum that it can deliver? If a PSU is rated for a certain wattage, and it has a certain warranty length, that means that the PSU will be able to deliver that wattage while under warranty. A 450W PSU with a 7 year warranty will be able to deliver 450W continuously for 7 years.

[Eigenvektor]

1 minute ago, seon123 said:

Even with higher end systems, you'll see that the power draw during gaming is about GPU TDP + 70W. As the 1050 Ti is a 75W card, and the 9400 is 65W CPU, it will be well below 200W.

I calculated 80+80+25, which is 185 Watt. I said above that it should be within 200-250 Watt. Like I said, I'm erring on the side of caution.

2 minutes ago, seon123 said:

Do you seriously think that the PSU's rated wattage is the actual maximum that it can deliver? If a PSU is rated for a certain wattage, and it has a certain warranty length, that means that the PSU will be able to deliver that wattage while under warranty. A 450W PSU with a 7 year warranty will be able to deliver 450W continuously for 7 years.

I'm aware that there's sustained wattage and peak wattage. I'm also aware that a good PSU should be able to deliver that over the course of its life. Again: Erring on the side of caution.

[Dr.Bee]

Hey if  I get a 600 w wold that afect my pc