How many gaming pc's can run on a 15amp circuit?

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Q. Considering each pc was running a 750watt power supply? Or a 550watt power supply? or as low as a 330watt powersupply? I understand it depends on the games and settings etc.but I just wanted a rough idea on the number of computers? Would 4 PC's be safe? Also each would have energy efficient led monitors, say 21" or so.

Answer
The PSU wattage doesn't matter, the computer only uses as much as the components demand.

I have:

700W non power factor corrected PSU
ASRock X79 EXTREME4-M
Intel i7 3820 @ stock speed and voltage
16GB (2x8GB) RAM
GTX 560 card, also stock speed and voltage

My system uses ~90 watts idle, and 400 watts with Prime95 and Furmark both running, so:

400w/100v (worst case) is 4 amps BUT since it is non-PFC, its power factor is only .6, so ~6.7 amps.

This is without the monitor hence I could only run 2 system units, but with my dual monitors and AVR for surround sound I can only run 1.

Also circuits can't be loaded to more than 80% if it is a load that will be on for more than a few minutes, hence you only have 12 amps to play with, not the full 15.

You should buy a kill-A-Watt meter, plug your rig into it, play your games for 1 hour, and the recorded watthour usage for that hour is your actual average power usage, IE if it shows .24KWh after 1 hour, you averaged 240 watts, and with all PCs having active power factor correction you could theoretically run 6 of them on the same circuit.

How can i make the best gaming pc you can get under 950$?

Q. I want the best you can get out of this money. And i want to know if its capable of playing games such as battlefield 3 black ops 2. And i also want to know if it will be capable of playing Call of Duty Ghosts and battlefield 4 when they are out. I need a monitor keyboard and mouse to fit this budget. It may be a tight budget but i really want to become a pc gamer. SO MANY ADVANTAGES! NO i DONT need an OS

Answer
The config I'm recommending will include peripherals (keyboard, mouse, speakers, and screen)

ASUS Motherboard Socket LGA1155 [P8H61-M LX3 PLUS] @ US$65.90
INTEL Prcessor Core [i5-3570] @ US$229.90
WESTERN DIGITAL Caviar Blue 500GB [WD5000AAKX] @ US$45.90
ASUS NVidia GeForce GTX 650 [GTX650-DC-1GD5] @ US$159.90
Optical drive just find by your own, however for DVD @ US$15.90
THERMALTAKE LitePower 600W [W0355RE] @ US$59.90
COOLER MASTER Middle Tower HAF 912 Combat [RC-912-KWN2] @ US$89.90
CORSAIR 2 x 4GB DDR3 PC-17000 [Vengeance CMZ8GX3M2X2133C9R] @ US$109.90
Monitor LED 18.5" SAMSUNG SyncMaster [S19B310B] @ US$119.90
LOGITECH Wireless Combo MK220 [920-003235] @ US$23.90
or
LOGITECH Media Combo MK200 [920-002693] @ US$15.90

TOTAL--------------------------------------------------------------------------------------------------------------- US$921.00

I'm sure that you'd want to save some of those budget to purchase games later

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