features

What features do you recommend for a high-end gaming pc?

I would start with your basics first like a
CPU
GPU
RAM
MOBO
Fans
Maybe even a case if you don't want an open build?
Personally I dropped a 5600x, 3060 and 16gb of Ram onto a b550 w/ wifi 6
and I can run everything no lag, no stutter, no problem

CPU: Intel Core i7 10700K
Mother Board: MSI MPG Z490 Gaming Carbon WiFi
Graphics Card: Nvidia GeForce RTX 2080 Super
Memory: G.Skill TridentZ RGB 2x8GB DDR4-3200
Primary Memory: Samsung 970 Evo 1TB
Power Supply: Corsair RM850x
Case: NZXT H500 / H500i
CPU Cooler: Cooler Master MasterLiquid ML240R RGB