[SOLVED] What am I missing from this build/What should I do differently?

Solution
You can do better for cheaper by swapping a few parts around. On the other hand you could go with the RTX 2080 Super and spend more towards the upper end of your budget.

PCPartPicker Part List

CPU: AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor ($327.79 @ OutletPC)
Motherboard: MSI B450 GAMING PRO CARBON AC ATX AM4 Motherboard ($159.99 @ Amazon)
Memory: G.Skill Ripjaws V Series 32 GB (2 x 16 GB) DDR4-3200 Memory ($144.99 @ Newegg)
Storage: Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive ($94.99 @ Adorama)
Video Card: Zotac GeForce RTX 2060 6 GB GAMING AMP Video Card ($319.99 @ Newegg)
Case: Phanteks Eclipse P400S ATX Mid Tower Case...

WildCard999

Titan
Moderator
You can do better for cheaper by swapping a few parts around. On the other hand you could go with the RTX 2080 Super and spend more towards the upper end of your budget.

PCPartPicker Part List

CPU: AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor ($327.79 @ OutletPC)
Motherboard: MSI B450 GAMING PRO CARBON AC ATX AM4 Motherboard ($159.99 @ Amazon)
Memory: G.Skill Ripjaws V Series 32 GB (2 x 16 GB) DDR4-3200 Memory ($144.99 @ Newegg)
Storage: Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive ($94.99 @ Adorama)
Video Card: Zotac GeForce RTX 2060 6 GB GAMING AMP Video Card ($319.99 @ Newegg)
Case: Phanteks Eclipse P400S ATX Mid Tower Case ($79.99 @ Newegg)
Power Supply: SeaSonic FOCUS Plus Gold 650 W 80+ Gold Certified Fully Modular ATX Power Supply ($102.99 @ SuperBiiz)
Operating System: Microsoft Windows 10 Home OEM 64-bit ($99.89 @ OutletPC)
Case Fan: be quiet! Pure Wings 2 120 PWM 87 CFM 120 mm Fan ($11.99 @ SuperBiiz)
External Storage: Seagate Backup Plus 1 TB External Hard Drive ($38.99 @ Best Buy)
Total: $1381.60
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-08-31 16:25 EDT-0400


Update the BIOS using MSI Flashback feature.
View: https://www.youtube.com/watch?v=iTkXunUAriE
 
Solution