Is the RTX 5060 enough for 1440p gaming?

Yes for most current titles at high settings, helped by DLSS 4 upscaling. For maximum settings at high refresh rates, expect to lower some options or lean on DLSS more heavily.

Can I upgrade this PC later?

Corsair built it for upgrades: there are extra DRAM slots, room for more SSDs, and the case fits up to a 360mm liquid cooler. The 3500X case has removable front and side panels to make swaps easier.

Does it come with Windows installed?

Yes, it ships with Windows. Setup is the usual Windows first-boot process rather than a bare-drive install.

How does it compare with the previous Vengeance generation?

The jump is to AMD's Ryzen 9000 series and NVIDIA's Blackwell RTX 5060, which brings DLSS 4 and full ray tracing. The cooling setup, with a 240mm AIO and six ARGB fans, is the other headline change.

Is liquid cooling necessary on a Ryzen 5 9600X?

Not strictly; the 9600X is a modest 65W-class part that air coolers handle. The 240mm Nautilus mainly buys lower temperatures and quieter sustained loads, and leaves headroom if you upgrade the CPU later.

The desktop itself with Windows installed, plus documentation. Corsair does not list a monitor, keyboard or mouse among the highlights, so plan on supplying your own peripherals.