Looking at current pricing for identical specs (i5-13600K, RTX 4070, 32GB RAM, 1TB NVMe) across both options shows a custom build total around $1,670 versus an equivalent pre-built from a major ...

If you're going to replace your PC's HDD with an SSD, you first need to check what kind of connections your system supports. Most pre-built desktops will support SATA or M.2 SSDs.

This is always going to be the problem with pre-built PCs. One look on PC Parts Picker shows you could get all the parts yourself and build it, and save yourself over £300 in the process.