During CES, we have spoken to several EVGA representatives regarding the company's recent marketing plans and ideas. In our discussion, the company revealed two prototype PSUs that it has been considering for the retail market.
Well, they do have brownouts here, but not too many basements. Earthquakes ya know heheh. Yeah, 750 watter seems enough, funny thing is, people whod need a 1400 watter, theyd end up hiring someone else to do it, more than likely
I wouldn't say 120A @ 12V would trip a healthy 15A breaker that often. Silverstone's efficiency at full load with high capacity PSUs seems around 82%, so 1440W leads to a 1756W AC draw, or 14.6A @ 120V. This is a power factor corrected PSU, so you don't have to bump wattage by 15-20% for volt-amps. During a brownout, efficiency does drop a few % down to 90V, but the circuit breaker would also need a higher amperage to trip. 90V is the lowest voltage most high-end PSUs are specified down to.
The main thing is that it's hard to perfectly load a 1200W PSU. Many people buy PSUs of a higher capacity for the individual rails, for more stable power, and in consideration of PSU aging (which has a measurable impact on capacity, not efficiency). A 1200W PSU certainly won't draw 1756W AC continuous running a tri-SLI i7 gaming system.
And if your circuit does trip - if the breaker is corroded after many years - any electrician can replace the 15A with a 20A at the offending juncture.
breakers trip low very often, and I've seen a PSU test efficiency writeup that showed acual efficienciesdropping off very significantly toward 90 volts. If I remember, the 80plus they were looking at was closer to 70%.
I tripped a breaker with my old computer (350 watt psu), boombox, and aquarium. probably not much over 1000 watts. you may say it wasn't healthy, I say very few circuts are up to what they should be. that's why I say go a little overboard on the wall power if you go that much overboard on the PSU.
some people may actualy need that much 12volt draw if they've got TECs and/or waterpumps in the mix with all the fans and graphics cards.
I was also refering to the whole computer setup, not just the box. You need to remember to add in the monitor(s), powered speakers, wireless router, cable modem,light(s), printer(s)
There is a lot more than just some mathmatical equations under ideal conditions involved in all this.
Is 100 volt lines new? I thought everything was rated at 110, with 120 possible? Also, Im hoping its higher than 75%, maybe over 80%
Every 120V receptacle or outlet I have checked is 120V +/- 5%. It seems 110V is old because I hear lots of older people saying it's 110V, where my voltmeter says it is 120V. Your house or Apt, whichever it may be is 2 phase 120V/240V
100 volts may be a bit low, but its only a very minor brownout.
published efficiencies are also optimistic, like the gross HP ratings of 60's muscle cars and current electric motor power ratings.
efficiency drops off if the supply voltage is low, and when you are near the limits.
so 75% efficiency and 100 volts is going to be seen from time to time, unless the power grid is phenominal in your neiborhood
Are you going to want to check the wall voltage every time you want to play Crysis?
whe the weather is ****, or when its too hot to go outside are the best time to waste in front of a computer.
I'd want a dedicated 20 amp circut (thicker gauge wiring too, not just swaping out to a bigger breaker) for my computer if I "needed" a 1200 watt PSU.
Hey, I cannot stress enough that you simply cannot just swap out breakers of different Amperage. The Breaker that you are replacing it with has to be the same size or smaller. Electrons create heat which in turn can cause fires when smaller conductors get too hot due to the extra current flow. You are correct that 12GA conductors are rated for 20A. 14Ga for 15A, 10GA for 30A(Wires made of Copper not of Aluminum) Aluminum is not that great of a conductor, so it cannot handle the same loads that a similar sized copper conductor can.