How much Wattage?

[ClubGaming_]

I finally decided that im gunna go with the XFX Radeon r9 390 8GB  for my graphics card. I started ordering parts and i realized that one of the reviews on newegg said that he had to upgrade his PSU because the card needs a minimum of 750 watts to run. Is that true? Or am i good with a 650 watt?

My build plan: http://pcpartpicker.com/p/CvxsD3

[FuzzyYellow]

@ClubGaming_ a good 650 watt should be plenty.

 

 

that season unit you have should be fine as long as it has enough connecters.

Edited December 1, 2015 by Godlygamer23
Corrected tag.

[Godlygamer23]

Your power supply is 620W. Regardless, it's totally fine.

[ClubGaming_]

a good 650 watt should be plenty.

Okay thanks! So whats up with that guys post?

[Godlygamer23]

Okay thanks! So whats up with that guys post?

First guess. Ignorance. Second guess. Someone else's ignorance.

[TheRandomness]

Okay thanks! So whats up with that guys post?

Is paranoid about his system. You'd be fine on a 550W PSU

[Imabigmac]

What you have planned will be fine. Just to ad one more vote for your good and the person from the review believes everything they read. 

[ClubGaming_]

First guess. Ignorance. Second guess. Someone else's ignorance.

Alright thanks again . I had already bought the PSU so it would have been a pain to send it right back

[Gregvibe]

guys from xfx site it says the minimum psu requirement should be 750w. if you know better then it's fine by me..

[Godlygamer23]

guys from xfx site it says the minimum psu requirement should be 750w. if you know better then it's fine by me..

I'm almost certain it's to save their butt.

[Gregvibe]

I'm almost certain it's to save their butt.

to save their butt from what?? in case the card crashes? I don't know guys, if it was me and got that gpu I would go with the manufacturer's instructions

[Godlygamer23]

to save their butt from what?? in case the card crashes? I don't know guys, if it was me and got that gpu I would go with the manufacturer's instructions

If you look at reviews of this card, it is not going to pull anywhere NEAR 750W. In fact, HardOCP gets the total system wattage at 419W.

 

Their test setup:

 

The power draw of the entire system:

 

Source: http://www.hardocp.com/article/2015/09/21/xfx_r9_390_double_dissipation_8gb_video_card_review/1

[Gregvibe]

I'm still confused with that. why would xfx recommend a minimum 750w psu? do you have an explanation?

 

[Godlygamer23]

I'm still confused with that. why would xfx recommend a minimum 750w psu? do you have an explanation?

To cover their butt. That's why. That is the only reason. Wattage isn't everything anyways.

 

What if for all intents and purposes you have a 750W unit that delivers MOST of its current on the 5V rail. It's by definition 750W, but it'll do you no good in powering a high end build. Wattage by itself in a power supply is meaningless. You must look at the individual rails to see if it can support your system properly.