My PC still works but it has trouble when it comes to streaming FPS shooters. Would it be worth it to upgrade any of these parts, besides the CPU?
EVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5
CORSAIR Enthusiast Series TX750 V2 750W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE
G.SKILL Ares Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
SanDisk Extreme SDSSDX-120G-G25 2.5" 120GB SATA III Internal Solid State Drive
ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
EVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5
CORSAIR Enthusiast Series TX750 V2 750W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE
G.SKILL Ares Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
SanDisk Extreme SDSSDX-120G-G25 2.5" 120GB SATA III Internal Solid State Drive
ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard