Giga wrote My friend is building a new PC within a timespan of the next 20 weeks and he's looking to play games such as Overwatch, most Call of Duty games, Battlefield 3-4-1 possibly, and other newer titles with decent performance. He isn't looking for peripherals as he's already got those. He would prefer a new OS as well (most likely Win10). His budget as of now is $900 USD

I'd do it myself but I've been inactive as hell and would prefer to get someone a little more experienced in this area to build it. Also don't PM me, post here. Thanks in advance!

Hi bud let me try and put a build together for you
This is one i put together in a minute or two, as it is over some time i will either be revisiting this thread or editing this post when i think of different combinations that i think will be better.

I have not included a optical drive does he need one? (14USD)
I have not included a OS in this list because, it is MUCH cheaper to download windows 10 for free to a USB drive and then booting the new machine up with that USB device and buying a windows 10 product key from a online site like g2a. Tell me whether you will do this or you have something against doing it this way and i will change the build to include the $85 OS instead of a $20ish product key, some people just prefer to keep it simple...

PCPartPicker part list: [ Register or Signin to view external links. ]
Price breakdown by merchant: [ Register or Signin to view external links. ]

CPU: Intel Core i5-6600 3.3GHz Quad-Core Processor ($214.99 @ SuperBiiz)
Motherboard: ASRock H170A-X1 ATX LGA1151 Motherboard ($74.98 @ Newegg)
Memory: Avexir Core Series 16GB (2 x 8GB) DDR4-2400 Memory ($67.99 @ Newegg)
Storage: A-Data Premier SP550 120GB 2.5" Solid State Drive ($38.74 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($48.89 @ OutletPC)
Video Card: EVGA GeForce GTX 1070 8GB SC Gaming ACX 3.0 Video Card ($389.99 @ Newegg)
Case: Thermaltake Versa H23 ATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: EVGA 450W 80+ Bronze Certified ATX Power Supply ($24.99 @ Newegg)
Total: $885.56
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-11 21:43 EST-0500

IMO this build has a nice CPU while also having one of the best 1070 GPU's on the market right now. More than enough HDD space and enough SSD space for the OS and his 1 or 2 main games.

Kind regards