i3 4160 - R$ 475 - https://www.guerradigital.net/intel-core-i3-4160-haswell-dual-core-3-6ghz-lga-1150-54w-intel-hd-graphics-4400-bx80646i34160.html
GA-B85M-D3PH - R$ 285 - https://www.guerradigital.net/gigabyte-ga-b85m-d3ph-lga-1150-intel-b85-hdmi-sata-6gb-s-usb-3-0-micro-atx.html
G.Skill 8GB 1600MHz CL9 - R$ 305 - https://www.guerradigital.net/memoria/ddr-3/g-skill/memoria-g-skill-ripjaws-x-series-8gb-ddr3-1600-pc3-12800-f3-1600c9s-8gxm.html
R7 260x - R$ 440 - https://www.balaodainformatica.com.br/Produto/91360/Placa-de-Video-Power-Color-Radeon-R7-260X-2GBD5-DHV4E_OC--Memoria-de-Video-2GB-GDDR5-Interface-de-memoria-128-bits
Western Digital 1TB (só custa R$ 10 a mais que o de 500GB) - R$ 245 - https://www.guerradigital.net/armazenamento-hard-disk/1-tera/western-digital-caviar-blue-1tb-7200-rpm-64mb-cache-sata-iii-6-0gb-s-3-5-wd10ezex.html
CX-430w - R$ 200 - https://www.guerradigital.net/corsair-builder-series-cx430-430w-atx12v-v2-3-80-plus-bronze-pfc-ativo-cp-9020046-ww.html
Cougar Archon - R$ 155 - https://www.guerradigital.net/gabinete-cougar-archon-5mm5-mid-tower-preto.html
Total: R$ 2105
Vai rodar os jogos atuais (GTA V, BF4, Dying Light, etc.) na qualidade média/alta em FHD. Jogos mais antigos e leves (CS:GO, Dota 2, LOL, etc.) vão rodar no ultra.