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Should i get a PSU of 600W or of 750W ?

Hey guys, i just wanted to know that whether, I should get a PSU of 600 watt or of a 750 watt coz I still don't know, how many voltage or power, will my rig take from that PSU??
BTW, here is my rig that i am currently building:
Intel i5 4670k S1150
Asrock Z87 Extreme 4
RAM 8 GB DDR3 G.SKILL RIPJAWSX
ASUS R9280X DC2 TOP
WD 1TB BLACK
COOLER MASTER HYPER 212 EVO
COOLER MASTER HAF 912 MID TOWER
ASUS OPTICAL DRIVE
SSD 60 GB
Dell S2240L Monitor

I have my eye on this PSU, SEASONIC S12II 620 which is also a bronze certified and have a efficiency of 87 %.
So, should i go with that above *(mentioned) PSU or should i get a new PSU of 700/750 watt???
So, what do you think, my rig need a PSU of 600w aor of a 700w ??
6 answers Last reply Best Answer
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  1. Best answer
    620w is more than enough. Your system will pull probably 350w or so at full 100% CPU and GPU load. The 620w SeaSonic will be able to power it no problem.
  2. Stay with 620watts. 750 watt is OP in this setup. Unless you are planning to go SLI in the future, then get 750watt
  3. that seasonic will be fine if you do not crossfire.
    Generally any good quality psu from Corsair,Seasonic, Antec of 600 watts will be enough.
  4. HiTechObsessed said:
    620w is more than enough. Your system will pull probably 350w or so at full 100% CPU and GPU load. The 620w SeaSonic will be able to power it no problem.


    ok, thanks bud. Now i know that which PSU should i get, i mean i will go with that 620 watt..
    Thanks again..
  5. Adrian Ocampo said:
    Stay with 620watts. 750 watt is OP in this setup. Unless you are planning to go SLI in the future, then get 750watt


    Thanks bud, now i got my answer! :)
  6. gommerspider said:
    that seasonic will be fine if you do not crossfire.
    Generally any good quality psu from Corsair,Seasonic, Antec of 600 watts will be enough.


    ok, i will go with a Seasonic 620 watt PSU.. :D
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