Looking to upgrade existing desktop

$1000 is more than plenty! I know you said you're looking for a CPU/MOBO/PSU, but keep in mind you'll also need some RAM, due to the new mobo.

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU AMD - Ryzen 5 1600 3.2GHz 6-Core Processor $189.89 @ OutletPC
Motherboard Asus - STRIX B350-F GAMING ATX AM4 Motherboard $102.89 @ OutletPC
Memory Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory $159.99 @ Newegg
Power Supply EVGA - SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply $69.89 @ B&H
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates) $542.66
Mail-in rebates -$20.00
Total $522.66
Generated by PCPartPicker 2017-11-24 01:31 EST-0500

Or this if you'd like to max it out: PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU Intel - Core i7-8700K 3.7GHz 6-Core Processor $414.89 @ B&H
CPU Cooler Corsair - H100i v2 70.7 CFM Liquid CPU Cooler $84.99 @ Best Buy
Motherboard Gigabyte - Z370 AORUS Gaming 7 (rev. 1.0) ATX LGA1151 Motherboard $179.99 @ Newegg
Memory Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory $159.99 @ Newegg
Power Supply EVGA - SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply $69.89 @ B&H
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates) $929.75
Mail-in rebates -$20.00
Total $909.75
Generated by PCPartPicker 2017-11-24 01:32 EST-0500
/r/buildapc Thread Parent