HP ProDesk 405 G4 review: specs, options & used prices

What this machine is

The HP ProDesk 405 G4 belongs to the class of machines that filled offices for years and now fills the secondary market — practical, repairable, and priced accordingly.

Business-line machines are the backbone of the secondary PC market for a practical reason: they were sold in large volumes to offices, serviced professionally, and then retired in bulk.

Only 2 tracked listings survive for this model, so treat any quoted price as indicative rather than a market consensus.

Configurations you will actually see

The CPU options we track for the ProDesk 405 G4 are the Ryzen 3 PRO 2200GE and Ryzen 5 PRO 2400GE. AMD Ryzen options cover the mainstream range for this era; the specific SKU in each listing decides the performance tier.

Memory options run from 8 GB to 8 GB (8 GB). 8 GB is workable for one person; 16 GB is the comfortable setting for typical office and home use.

Upgrade path and running costs

The full-size case leaves room for standard parts and a conventional power supply, which makes this one of the easiest classes of machine to upgrade and repair.

Who it fits

If the task is browsing, office documents, video calls, or a kiosk/POS role, the ProDesk 405 G4 does the job at a low sensible price.

Full specifications, current options and tracked prices live on its spec sheet; the desktop catalog and the HP desktops page help place it among the alternatives.

Verdict

The case for the ProDesk 405 G4 is simple: standard parts, predictable supply, and a price that leaves room in the budget for upgrades.

Price data is thin for this model, so compare current listings directly rather than relying on a quoted median — configuration differences dominate on this class of machine.

Our composite LB Score currently sits at 14/100 — a score that mostly reflects the platform age — use it to compare like with like, not against modern hardware.