AM4 or AM5: choose the right budget PC platform

By James Thompson · Published 7 October 2026

Some links in my articles are affiliate links. I may earn a commission when you buy through them.

Photorealistic illustration of two desktop motherboard, processor and memory combinations against a navy, cyan and violet background.

I’d keep a good AM4 board and DDR4 kit working when a sensible CPU upgrade does the job. For a new system with more room in the budget, I’d lean towards AM5. The deciding figure is the cost of the processor, board and memory together.

For each option, add CPU, motherboard, one suitable memory kit, required cooling and any missing connections. Retaining an existing AM4 board and DDR4 is a different purchase from buying every part new.

The Ryzen 5 5600 is an AM4 DDR4 option; the Ryzen 5 9600X belongs to AM5 and DDR5. The memory generations are not interchangeable. Our entry AM4 and AM5 parts lists make the surrounding purchases visible.

Compare the complete spend using the expanded platform-upgrade guide. Before reusing a board, use the exact CPU/BIOS support check.

When I would keep or choose AM4

An existing supported AM4 board and RAM can make a CPU-only upgrade economical. Check the manufacturer’s CPU list, firmware requirement and board revision while the current system still starts. Include any cooling change in the total.

For a new low-cost build, AM4 is worth comparing if a complete platform saving funds the graphics card or monitor you need. It becomes less persuasive when the saving is small, the board is an expensive old-stock listing, or your high-refresh games need substantially more CPU performance.

For current platform choices, compare processors and motherboards. The gaming build guide keeps each CPU, board and memory combination together.

Photorealistic illustration of a desktop processor with a silver heat spreader against a navy, cyan and violet background.

When AM5 earns the extra cost

AM5 can make sense for a new system with sufficient room in the budget and an intended future upgrade. Buy a board for the ports and supported CPUs you can identify, rather than assuming an unlimited upgrade path. Future product support still depends on the board and firmware.

A DDR5 kit at an inflated price can change the decision. Do not call an AM5 configuration affordable merely because its CPU is on offer. Compare the whole basket again on the day you order.

Display output and cooling need their own check

AMD’s Ryzen 5 5600 information specifies that a discrete graphics card is required and lists the Wraith Stealth cooler. A motherboard display socket will not supply a picture from that processor. The 9600X specification lists integrated graphics and no included cooler.

Check the 5600 against the board support list and confirm the selected chip’s display provision. Include the whole platform change when judging the processor’s value.

Photorealistic illustration of two matched pairs of black desktop memory modules against a navy, cyan and violet background.

Put the saving against the job you need done

If the AM5 premium would force you from an appropriate GPU to one poorly suited to your games, compare AM4 or wait. If both baskets meet the graphics target comfortably, weigh the extra platform spend against CPU performance, connections and a realistic upgrade plan.

Use the CPU upgrade decision for an existing PC and the calculator for exact current costs.