Need help upgrading old PC (reusing old parts?)

[santaki1]

Intended usage: I will mostly use it for playing new MMOs and indie single player PC titles. Some recent ones include ArcheAge, Blade & Soul, Ori & Blind Forest, Concrete Jungle, and Anno 2205. I don't plan on using SLI/Crossfire or Overclocking.

Screen resolution, FPS, game settings: 1920x1080p, 60 FPS, medium.

Budget: Approximately $550 USD.

Country: United States.

Upgrading Parts: CPU, GPU, Motherboard, maybe Case

Current Build:

This build is from 2009 and I'm still able to play most games at 30-50 FPS on low-medium settings.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD Phenom II X4 965 Black 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler (Purchased For $0.00)
Motherboard: ASRock 770 Extreme3 ATX AM3 Motherboard
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Video Card: Sapphire Radeon HD 6870 1GB Video Card
Case: Antec Three Hundred Illusion ATX Mid Tower Case
Power Supply: OCZ StealthXstream II 600W 80+ Certified ATX Power Supply
Total: $0.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-01 20:05 EST-0500

Upgraded Build:

I've heard that Intel is preferred over AMD for MMO gaming, so I'd like to go with an i5 CPU. If possible, I would like to reuse the CPU Cooler, RAM, PSU, and Case(still debating). Since my parts are at least six years old, is this recommended? Will there be a problem with using DDR3 with my CPU? Should I switch to a DDR4 Motherboard and buy DDR4 RAM?

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor ($199.88 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler (Purchased For $0.00)
Motherboard: Gigabyte GA-Z170-HD3 DDR3 ATX LGA1151 Motherboard ($99.99 @ SuperBiiz)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Video Card: MSI Radeon R9 380 4GB Video Card ($219.99 @ Micro Center)
Case: Enermax ECA3280A-BR ATX Mid Tower Case ($77.43 @ Amazon)
Power Supply: OCZ StealthXstream II 600W 80+ Certified ATX Power Supply (Purchased For $0.00)
Total: $597.29
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-01 20:05 EST-0500

 

[raihan4]

I modified your part list a little

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor ($199.88 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler (Purchased For $0.00)
Motherboard: Asus B150M-A D3 Micro ATX LGA1151 Motherboard ($66.99 @ SuperBiiz)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory (Purchased For $0.00)
Video Card: Gigabyte Radeon R9 390 8GB SOC Video Card ($289.99 @ Micro Center)
Case: Cooler Master N200 MicroATX Mid Tower Case ($29.99 @ Newegg)
Power Supply: OCZ StealthXstream II 600W 80+ Certified ATX Power Supply
Total: $586.85
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-01 20:20 EST-0500

fitted a 390 there, and yes you're okay with DDR3