Is the i5-14400F enough for an RTX 5080?

For most 1440p and 4K gaming it is fine, because the GPU carries the load. In CPU-bound titles, high-refresh 1080p play and heavy streaming or simulation, the six-core 14400F will hold the 5080 back.

Yes. The RTX 5080 is built for 4K with DLSS upscaling and frame generation, and 16GB of VRAM covers current titles at high settings. Expect to lean on upscaling in the newest games.

Do I need 64GB of RAM for gaming?

No. 32GB is plenty for gaming and most creative work; 64GB helps with large video projects, virtual machines and heavy multitasking. It is a nice extra rather than a requirement.

The listing does not state Wi-Fi, so assume wired Ethernet unless the retailer confirms a wireless card. Check the motherboard model before buying if Wi-Fi matters to you.

Can I upgrade the CPU later?

The i5-14400F sits on Intel's LGA 1700 socket, so a 14th-gen or 13th-gen Core i7 or i9 can drop in if the board and BIOS support it. That is the simplest way to remove the CPU bottleneck.

Typically the tower itself with the GPU, CPU, RAM and SSD installed, plus a power cable. A monitor, keyboard and mouse are not included, and Windows may or may not be preinstalled, so confirm before ordering.