R9 390 8GB Power consumption

[stenterstal]

Hello everybody,

I had a small question, I might want to buy a R9 390 but it says you need a 750 watt PSU. Only problem, I have a 650 watt PSU. Do I need to upgrade my PSU or is it fine like this? My system also has a Intel I7-4770S, 4 fans, HDD and SSD. Also Note that the site says the GPU will use 275 watt at max.

Hope to hear from you guys,
Sten.

#EDIT: Also note im not planning on overclocking the GPU.

 

[Dark Lord of Tech]

A decent 650w PSU will easily run a 390.

A Radeon R9-390 needs 30 amps on the 12v + rail and a 550 watt to 600 watt power suppply with 2 - 6+2 pin PCIE power connections.

 

[laviniuc]

model of the 650w psu please?

 

[Zerk2012]

R9 390 has a TDP of 275 watts, period.
65 watts for your processor around 80 or less for everything else in the PC.
That puts you in the 425 Watt area during a Full system stress test.
If you have a decent power supply that can actually deliver 650 Watts your fine if you have a overrated 650 watt power supply that can only put out 500 watts your not.
It usually helps to list the power supply with PSU questions.

 

[stenterstal]

I have a Corsair CX600M ( I was wrong on the 650 watt), it has a 80+ bronze mark

 

[Dark Lord of Tech]

If your 650w PSU meets the requirements I posted above , most do , it can easily power a 390.

 

[Zerk2012]

I have a Corsair CX600M ( I was wrong on the 650 watt), it has a 80+ bronze mark

Not the best quality power supply but they are worse.
552 Watts on the 12 volt rail If that's what I had in my PC I would install a R9 390 and not be worried about it.
That would put you in the 75% range during a full system stress test and in the 65% range under normal use like gaming.