How many watts of power will I need for my gaming computer?

6 monitor gaming setup image

Dope

This summer I plan on building my own gaming PC and assembling it at home because it is cheaper and I like to customize things myself. It is an 850 dollar computer but the specs are exceptional. For the motherboard and processor, I am following a YouTube tutorial. In the YouTube video it says only 500 watts of power are needed, but in the comment section somebody (who was picked for best answer) claims that you actually need at least 630. I am planning on getting a 750 watt battery anyways, but if I don't need to, I'll try and get something cheaper. So how much power will I need based on this setup:

Processor:
Intel Core i5-3470 Quad-Core Processor 3.2 GHz 4 Core LGA 1155 - BX80637I53470 â ($188.79)
http://www.amazon.com/gp/product/B0087EVHVW/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0087EVHVW&linkCode=as2&tag=c09_11-20

Graphics Card:
Gigabyte Radeon HD 7850 Graphics Card (2GB) â ($194.99)
http://www.amazon.com/Gigabyte-mini-Displayport-PCI-Express-Graphic-GV-R785OC-2GD/dp/B007PJTNYS/ref=sr_1_1?s=electronics&ie=UTF8&qid=1365971519&sr=1-1&keywords=amd+radeon+hd+2+gigabyte

Motherboard:
MSI LGA1155/Intel B75/DDR3/SATA3 USB 3.0/A&GbE/MicroATX Motherboard B75MA-P45 â ($64.99)
http://www.amazon.com/gp/product/B008S8WA18/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B008S8WA18&linkCode=as2&tag=c09_11-20

Ram:
Corsair Vengeance 8 GB (2 x 4 GB ) â ($59.98)
http://www.amazon.com/gp/product/B004CRSM4I/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B004CRSM4I&linkCode=as2&tag=c09_11-20

Hard Drive:
500GB Western Digital Caviar Blue Hard Drive â ($59.99)
http://www.amazon.com/gp/product/B00461G3MS/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00461G3MS&linkCode=as2&tag=c09_11-20




Power Supply:
Corsair CX750 Builder Series ATX 80 PLUS Bronze Certified Power Supply (750W) â ($88.24)
http://www.amazon.com/gp/product/B0092ML0MY/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0092ML0MY&linkCode=as2&tag=c09_11-20

Optical Drive:
Asus 24xDVD-RW Serial ATA Internal OEM Drive DRW-24B1ST (Black) â ($20.04)
http://www.amazon.com/Asus-24xDVD-RW-Serial-Internal-DRW-24B1ST/dp/B0033Z2BAQ/ref=sr_1_2?s=electronics&ie=UTF8&qid=1365953829&sr=1-2&keywords=optical+drive

Tower:
NZXT Technologies SOURCE 220 CA-SO220-01 Matt Steel Mesh Front Mid Tower Case with USB 3.0 â ($68.98)
http://www.amazon.com/gp/product/B0066130AO/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0066130AO&linkCode=as2&tag=c09_11-20

Operating System:
Windows 7 System Builder â ($95.88)
http://www.amazon.com/gp/product/B0094NY3R0/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0094NY3R0&linkCode=as2&tag=c09_11-20

(Monitor:)
ASUS VS197D-P 18.5-Inch HD LCD Monitor â ($89.24)
http://www.amazon.com/ASUS-VS197D-P-18-5-Inch-LCD-Monitor/dp/B005PAIVII/ref=sr_1_3?ie=UTF8&qid=1365972998&sr=8-3&keywords=Cheap+Computer+Monitors+Under+100

Answer
500W (or greater) power supply with one 75W 6-pin PCI Express power connector recommended

http://www.amd.com/us/products/desktop/graphics/7000/7850/Pages/radeon-7850.aspx#2

Thus, for a system with a single HD7850, a good branded 600W PSU is the ideal one to get and since your mobo does not support crossfire, then that 750W is too much for that build since Xfire is already not possible.

BTW, for Xfire, amd recommends 600W minimum, thus 700W is the ideal one to have (just an added info).

What type of gaming computer should i get?

Justin

I play mostly MMORPGS and i can never run them the way i want because i never have the right setup
im currently playing SWTOR and i want to know what specs should my new coputer have to run the game on the absolute higest settings without any lag ?

Answer
Do you have a budget constraint? We could recommend some pretty high end components but that would be useless unless you have a fairly unlimited budget. A desktop system for about $1000 (if you already have the monitor) should be able to handle most current games on moderate to high settings. If you are looking for highest settings on all games though, you'll probably need a system in the $1600+ range.

I'd start with looking for a system that has the following minimum requirements:

i5-2500 CPU
4-6 GB of RAM
GPU - See the first link below and pick something up near the top 5 or so tiers that is in your budget
600W or higher PSU
A crossfire or SLI capable motherboard

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