Hey guys, i have a question about amps. And how many amps my computer will draw. I am asking this because i want to know if i can run my computer in my room, which would be 20 amps allowed in the circuit.
my system is
4gb patriot ram
150 gb raptor
500 gb hdd
5 120 mm fans
ht omega soundcard
1000watt thermaltake toughpower
benq 24 inch
does anyone have any problem with this on thier circuits in the house? Does anyone know how to figure out total amps produced?
The amps drawn by any electrical device can vary. The most important point to begin with is that if your 120v outlet can provide 20 amps then that means your outlet will provide a maximum of 2400w of power (20A x 120v).
Your power supply (PSU) is basically a transformer. It will lower the voltage to something that is usable by the PC; basically 3.3v, 5v and 12v. The limiting factor is the 2400w at the outlet, the actual amount of amps provided depends on what the voltage setting is.
For simplicity let's assume your PSU is rated at 2400w which matches your outlet. If the entire PC draws power from the 12v rail, you will be able to draw a maximum of 200 amps. Why? Because 12v x 200 amps = 2400w. If all the power is drawn from the 5v rail, then the outlet will allow you to draw 480 amps because 2400w = 5v x 480A.
Getting back to your PC, a 1KW PSU is overkill. If you do not overclock, then a good quality 500w PSU would have no problems running your PC.
For starters, most residential (e.g., bedroom, home office) 120V AC receptacles are rated at 15A, and are on a shared circuit with other receptacles. Thus, if someone runs a hairdryer while you are maxing out your PC, you may trip the breaker. Some 120V circuits are rated at 20A, but these are typically for special use.
If you had sole use of a 15A, 120V circuit, that gives you 1800W (as others mentioned). Your PSU takes the 120V and converts it into the +12V, +5V, etc., needed by the computer. It is not 100% efficient, though. Assuming your computer components are putting exactly a 1000W load on your PSU, the load seen on the 120V side would be around 1250W (assuming 80% PSU efficiency). Working this another way, the maximum 1800W AC load translates into a PSU load of 1440W, again at 80% efficiency. YMMV.
Let's assume your PC is plugged into one of these shared 15A circuits. You should determine what else is plugged in to that circuit, and figure out if it would present a problem.
In any event, I recommend that you use a properly-sized, properly-grounded UPS to power your computer. Cheap insurance!