Originally Posted by DVIELIS
I didn't researched that, just automatically assumed shilka is right about those %.
I guess I'll now look skeptical on his posts, as all he said, turned out to be terribly wrong
Actually Shilka was right on the part that he didnt need 650W or 900W or any outrageous wattage. Alatar just pointed out that OP might have interest in doing 1.31v (but that takes a waterblock and good cooling of VRM's) ... so the need for a PSU bigger than 450W was "reasonable if OP was interested". Efficiency or not, it would be cost-ineffective to buy a 700W PSU and assume it runs the best at 50% load when in reality a high quality Gold/Platinum rated PSU with quality OEM internal parts can run very close to peak efficiency, 3%.... that is a very small amount. So when you mentioned that its "peak best" was at 50%, its actually not as noticable because the efficiency is so good as it is because it is a quality PSU , that you can get away perfectly fine with getting "enough wattage with enough headroom but nothing too overboard "
Originally Posted by Nukelear
Leaving a more headroom is never a bad thing as long you are not going for only the wattage. What you did is suggesting higher wattage psu but lower quality LOL.
Assuming he won't be overvolting, he is not after bragging rights and won't be running furmark and IBT at the same time (LOL has anyone try this?)
The system he will be running will only draw around 400w from the wall. So lets say that the psu he will get is Seasonic G, 89% efficient, (400)*(.89) = 356w actual power consumed.
Giving him more or less 200w HEADROOM
Exactly, he has tons of headroom with that 550W Seasonic PSU. I would go with that over a Corsair or Thermaltake unit as some units are actually based off some Seasonic PSU's.
550W is plenty for his rig if he chooses to keep it simple and go on air. Even if he overclocks to 4.8ghz @ 1.45v he will still have well enough wattage. I think any more than 550 is just "useless". Not even future proofing, just straight up useless.
Originally Posted by AJR1775
To OP, I have the same set up and I'm using a fanless Rosewill SilenNight 500W. Works great, my GTX 780 is overclocked as is my 3570K.
See? This guy is on 500W and hes perfectly fine. People overestimate how much wattage they need. But if you really start calculating it out and adding it up it makes a lot of sense how much wattage is being used. It isnt rocket science, its simple addition.