Is 450W PSU enough for the 960 ?

hamzyahoo7 · Oct 15, 2015

Hi, I want to upgrade from a 750ti to a 960 but I don't know if my 450W PSU with 3 12v rails that have a total of 32 amps can handle it,
Thank you.

MystoPigz · Oct 15, 2015

Yes, a 450 watt PSU will handle a GTX 960 GPU. Even a 400 watt PSU is sufficient. Just make sure your overall wattage for your PC is compatible with a 450 watt power supply.

-MystoPigz

hamzyahoo7 · Oct 15, 2015

MystoPigz :

Thank you, but why did the guy at the computer store tell me when I went to buy the card at a computer store that I need a 500W PSU and that 32 amps was not enough, I was surprised to hear that, was he lying ?

Dark Lord of Tech · Oct 15, 2015

A GeForce GTX 960 needs 20 amps on the 12v+ rail and a 400 watt power supply with 1 - 6 pin PCIE connection.

MystoPigz · Oct 15, 2015

hamzyahoo7 :

I do not know if he was lying, maybe a lack of information...? But, yes, a 450 watt PSU can definitely handle a GTX 960 GPU, but you have to make sure the total wattage for your PC is compatible with a 450 watt PSU. You also need to make sure the cables of your power supply are compatible with the power connectors on the GTX 960 you are looking at.

hamzyahoo7 · Oct 15, 2015

MystoPigz :

Alright, thank you so much, i was really confused from what I read on the Internet and what they told me there. I use this for calculating the total wattage of my pc right ? http://outervision.com/power-supply-calculator

Dark Lord of Tech · Oct 15, 2015

A GeForce GTX 960 needs 20 amps on the 12v+ rail and a 400 watt power supply with 1 - 6 pin PCIE connection.

Calculators aren't very accurate.

turkey3_scratch · Oct 15, 2015

If the other 2 rails are pulling in, say, 20 amps, and the 3rd is powering the GPU, it likely will not be able to. However, I can only see the CPU pulling in about 8 amps from 1 32 amp 12V rail, one of the 3 will likely go unused, so it should be enough power.

hamzyahoo7 · Oct 15, 2015

Alright thanks, but does it matter if I have 3 12v+ Rails that combined have 32 amps ?

Dark Lord of Tech · Oct 15, 2015

What PSU , make and model?

turkey3_scratch · Oct 15, 2015

hamzyahoo7 :

Can we specifically see the PSU model?

According to what you said, there are 3 12V rails. Think of a rail as basically a line in which power is sent. You said each rail has 32 amps. This would mean 384 watts per rail. However, all the 12V rails share a lot of components, so it is not the simple addition of all the 12V rails. A Single 12V rail in your case could only pull in 384 watts if there is no stress on the other 12V rails, and if temperatures are ideal. That is why the combined wattage is 450W, not 1000+ watts.

Dark Lord of Tech · Oct 15, 2015

We need the make and model as some units aren't labeled correctly.

hamzyahoo7 · Oct 15, 2015

I don't know the exact model of the PSU since it came with a Dell computer, and sorry for not being clear in my post but I have 3 12v+ rails that combined have 32 amps so for each of them it varies : 1 has 18, the other one 16 and the last one 8

Dark Lord of Tech · Oct 15, 2015

Does it have the 6 pin PCIE.

turkey3_scratch · Oct 15, 2015

Take a picture of it will ya.

If the "combined" is 32 amps then no way can you run the 960.

hamzyahoo7 · Oct 15, 2015

Yes it does

Dark Lord of Tech · Oct 15, 2015

It should be able to handle it , is your case big enough to accommodate the card?

turkey3_scratch · Oct 15, 2015

What really matters is the amps on each 12V rail, which we still do not know without an image of the output chart.

hamzyahoo7 · Oct 15, 2015

turkey3_scratch :

hamzyahoo7 · Oct 15, 2015

Yes it is.

turkey3_scratch · Oct 15, 2015

You can't give us your personal email. If that was the case Google would have a huge security flaw on their hands.

hamzyahoo7 · Oct 15, 2015

turkey3_scratch :

three 12v+ Rails : One with 18 amp / the other one with 16 amp and the last one with 8

turkey3_scratch · Oct 15, 2015

No you cannot run the 960 then.

hamzyahoo7 · Oct 15, 2015

turkey3_scratch :

alright thanks

Is 450W PSU enough for the 960 ?

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