My gaming pc build budget 400$

nvincent_08

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dont get intel cooler, their cooler were pretty crappy i bet, better just use the included cooling fan. also get b150 mobo could save some money, the b150 support kaby lake with the latest bios(some were already included with bios that support kaby lake), also if you want to you can save some money by getting lower watt psu, but not a problem if you want to have some headroom for future upgrades. dont forget that not all of components you choose have the price there
 
a few days late, but here is a better $400 build:

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 3 1200 3.1GHz Quad-Core Processor ($104.99 @ Newegg)
Motherboard: ASRock - AB350M Micro ATX AM4 Motherboard ($59.99 @ Newegg)
Memory: Patriot - Viper Elite 8GB (2 x 4GB) DDR4-2133 Memory ($45.99 @ Amazon)
Storage: Western Digital - RE3 1TB 3.5" 7200RPM Internal Hard Drive ($41.45 @ Amazon)
Video Card: PowerColor - Radeon RX 560 2GB Red Dragon OC V3 Video Card ($93.98 @ Newegg)
Case: Thermaltake - Versa H15 MicroATX Mid Tower Case ($34.75 @ Amazon)
Power Supply: Corsair - Builder 500W 80+ Bronze Certified ATX Power Supply ($19.99 @ Newegg)
Total: $401.14
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-09-08 11:59 EDT-0400

this users an RX 560 instead of an RX 550, a Ryzen 1200 with 4 real cores instead of the Pentium, and a 7200 RPM 1 TB drive instead of a 5400 500 GB drive. the older Corsair CX builder PSU isn't the best quality, but it isn't a PSU-shaped bomb either. It will be fine for this build, especially clearance-priced at $20
 
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