so i was reading

[FireofDestruction]

I  was looking on the manufacturer's website on the sapphire tri-x 290 and then i saw this "750 Watt Power Supply is required" yet pcpartpicker is saying a TDP of like 486 watts(in total) i'm super confused here what should i do got with a beefier power supply or ingore what the manufacturers website said....HELP please (currently going with a 650 watt power supply because not all the power converted is actually used)

 

[helping]

What do you mean by

 

 not all the power converted is actually used)

?

 

They recommend 750w because Joe is going to connect it to his 600w turd PSU and blow everything up then demand an RMA.

 

A 650w PSU will be fine (assuming decent quality)

[Kayn]

The 750w requirement is just to cover the manufacturer in case something goes bad. As long as you have a decent power supply 650w is more than enough for a single card.

[FireofDestruction]

What do you mean by

 

?

 

They recommend 750w because Joe is going to connect it to his 600w turd PSU and blow everything up then demand an RMA.

 

A 650w PSU will be fine (assuming decent quality)

what i mean is 650 x .80= 520 which gives an 80% efficiency  and the power supply i'm getting is a cosair cs650m so i should technically be just fine phew 

[helping]

what i mean is 650 x .80= 520 which gives an 80% efficiency  and the power supply i'm getting is a cosair cs650m so i should technically be just fine phew 

no, you have it the wrong way.

 

650w @ 80% efficiency yields 650w usable power (perfect scenario) and draws 650/.8 = 812w from the wall.

[ohJey]

no, you have it the wrong way.

 

650w @ 80% efficiency yields 650w usable power (perfect scenario) and draws 650/.8 = 812w from the wall.

I was just going to say this

a lot of people get this wrong sadly.. probably the reason a lot of people recommend overkill psus

[FireofDestruction]

no, you have it the wrong way.

 

650w @ 80% efficiency yields 650w usable power (perfect scenario) and draws 650/.8 = 812w from the wall.

terribly confused but ok thanks for well clearing up my problem...now to go get my facts straightened out herp da derp

[winningsince1337]

I  was looking on the manufacturer's website on the sapphire tri-x 290 and then i saw this "750 Watt Power Supply is required" yet pcpartpicker is saying a TDP of like 486 watts(in total) i'm super confused here what should i do got with a beefier power supply or ingore what the manufacturers website said....HELP please (currently going with a 650 watt power supply because not all the power converted is actually used)

 

I ran a 290 on a 6 year old Antec 500w PSU with 0 problems. (I don't really reccomend it) But, you're fine with a quality 550w PSU. At full load with the 4770k I never pull more than ~430 from the wall. Note this is not accounting for PSU efficiency so my hardware is actually drawing less.