How should I upgrade my 2016 budget PC?

[highttyler]

I'm an everyday gamer trying to figure out what upgrades I should make for my PC. I want to run Overwatch on medium/high settings on 1080p without dipping far below 60 fps, and run Destiny 2 smoothly. My computer components are:
GPU: NVIDIA GeForce GTX 750 Ti
CPU: Intel Pentium G3258
PSU: EVGA 500W 100-W1-0500
RAM: 8 GB
Motherboard: ASUS All Series H81M-A
OS: Windows 10
Hard Drive: 1TB
I' d like my budget to be $400, though I'd go slightly above if necessary. Any help is greatly appreciated!!!!!

 

[vapour]

what psu model is it?

 

[highttyler]

what psu model is it?

EVGA

 

[vapour]

full model please, W1?

 

[highttyler]

full model please, W1?

Yes, EVGA 500W 100-W1-0500

 

[vapour]

PSU not very reliable. Update in the future, use it for now.

No meaningful upgrade on that MB, my recommendation:

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 3 1200 3.1GHz Quad-Core Processor ($109.77 @ OutletPC)
Motherboard: ASRock - AB350M Micro ATX AM4 Motherboard ($59.99 @ Newegg)
Memory: Patriot - Viper Elite 8GB (2 x 4GB) DDR4-2666 Memory ($76.99 @ Newegg)
Video Card: MSI - GeForce GTX 1050 Ti 4GB Video Card ($154.99 @ Amazon)
Total: $401.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-11-08 21:59 EST-0500

Performance: https://www.youtube.com/watch?v=EK_ktjGHyeg
overwatch @ 11:00

 

[highttyler]

PSU not very reliable. Update in the future, use it for now.

No meaningful upgrade on that MB, my recommendation:

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 3 1200 3.1GHz Quad-Core Processor ($109.77 @ OutletPC)
Motherboard: ASRock - AB350M Micro ATX AM4 Motherboard ($59.99 @ Newegg)
Memory: Patriot - Viper Elite 8GB (2 x 4GB) DDR4-2666 Memory ($76.99 @ Newegg)
Video Card: MSI - GeForce GTX 1050 Ti 4GB Video Card ($154.99 @ Amazon)
Total: $401.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-11-08 21:59 EST-0500

Performance: https://www.youtube.com/watch?v=EK_ktjGHyeg
overwatch @ 11:00

You're awesome. Thank you