What is the Minimum Power Supply that i need?

[Jack_T]

I have the following components:
Intel core I7 4770 Processor
Geforce GTX 970
16GB Ram

I would like to know what the minimum power supply I need for my system to run sweetly
***I do not intend to overclock the GPU***
***I don't not care about the price***

 

[Milheim]

GeForce recommends a 500W PSU for that graphics card. Given the TDP of 84W for the i7 4770, an optical drive, and a hard drive, I'd suggest no less than 650W. I think 750W would give you a little extra headroom.

 

[toyftw]

I have the following components:
Intel core I7 4770 Processor
Geforce GTX 970
16GB Ram

I would like to know what the minimum power supply I need for my system to run sweetly
***I do not intend to overclock the GPU***
***I don't not care about the price***

Hi - There are 450w units that can run a sys with a 970, but they usually have only one pcie connector.
So, a good quality 550w unit is the way to go. Just insure that it has the requisite two pci connectors.

If you are concerned that more total watts means more electricity usage, that is not the case. The PSU
delivers inly the power need by the components at any given point in time.
For example if your system needs 300w, a 450w unit or 750w unit would each deliver the 300w needed.

Seasonic & Silverstone each have 450w units with at least two pcie connectors.

Hi again - A sys with one 970 requires 28 +12v amps (the CPU, GPU, hdd, etc, draw their current from the +12v rails)
the 450w inits mentioned above exceed that comfortably. You do not need anywhere near 650 or more watts.

 

[dylanestrada]

Enter your parts into here for an accurate calculation.


http://outervision.com/power-supply-calculator

 

[toyftw]

Enter your parts into here for an accurate calculation.


http://outervision.com/power-supply-calculator

when did this (or any of the other power calcs) become accurate?

 

[ZachyBeat]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

 

[ZachyBeat]

PCPartPicker part list: http://pcpartpicker.com/p/j2YXdC
Price breakdown by merchant: http://pcpartpicker.com/p/j2YXdC/by_merchant/

Power Supply: Rosewill 500W 80+ Gold Certified ATX Power Supply ($58.99 @ Amazon)
Total: $58.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-03 19:16 EST-0500

Something like this would work. It hasn't been added to the PSU Tier list yet but nothing about it looks worrying.
Edit: This is the Rosewill Valens 500w. Not sure why it isn't listed as the Valens version.

 

[toyftw]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

Not true

 

[ZachyBeat]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

Not true

With a 2 rail you can probably get away with it but not a 3 or higher rail PSU. I'm saying with a low wattage power supply having a multi rail PSU won't provide enough amperage on each rail.

 

[toyftw]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

Not true

With a 2 rail you can probably get away with it but not a 3 or higher rail PSU. I'm saying with a low wattage power supply having a multi rail PSU won't provide enough amperage on each rail.

Doesn't work the way you think (with good quality units such as I mentioned above), the PSU is designed
so that a power hungry component such as the GPU pulls from more than one rail, so if the total # of +12v amps
the GPU requires is available, then the sys will run fine.
That's why (when you look at the label affixed to the PSU) you will notice the total +12v amps avail is always
less than the sum +12v rails separately.

 

[ZachyBeat]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

Not true

With a 2 rail you can probably get away with it but not a 3 or higher rail PSU. I'm saying with a low wattage power supply having a multi rail PSU won't provide enough amperage on each rail.

Doesn't work the way you think (with good quality units such as I mentioned above), the PSU is designed
so that a power hungry component such as the GPU pulls from more than one rail, so if the total # of +12v amps
the GPU requires is available, then the sys will run fine.
That's why (when you look at the label affixed to the PSU) you will notice the total +12v amps avail is always
less than the sum +12v rails separately.

Genuinely curious. Are you saying that a 500w PSU with 4 or 6 rails would be able to power something like a 970 with 2x6pin? Those PCI E connectors I would assume would have to be on separate rails and not daisy-chained?

 

[toyftw]

GTX 970 uses 12 Amps, your CPU uses 7 amps, add your HDDs, headroom for expansion and PSU degrading (not to mention they aren't 100% efficient) and I would recommend a 450w Gold+ or a mid to high end 500w. Grab one with a single 12v rail as you won't be able to power your system with multi rails at that low of a wattage PSU.

Not true

With a 2 rail you can probably get away with it but not a 3 or higher rail PSU. I'm saying with a low wattage power supply having a multi rail PSU won't provide enough amperage on each rail.

Doesn't work the way you think (with good quality units such as I mentioned above), the PSU is designed
so that a power hungry component such as the GPU pulls from more than one rail, so if the total # of +12v amps
the GPU requires is available, then the sys will run fine.
That's why (when you look at the label affixed to the PSU) you will notice the total +12v amps avail is always
less than the sum +12v rails separately.

Genuinely curious. Are you saying that a 500w PSU with 4 or 6 rails would be able to power something like a 970 with 2x6pin? Those PCI E connectors I would assume would have to be on separate rails and not daisy-chained?

Can't state it any other way than I stated above. For example a GPU on a multi rail PSU is already in fact pulling from more than one rail in most cases, the power it gets from the mobo and the power it gets from the pcie connectors.