AM4 Upgrade in 2026: Stick With It or Switch to AM5?
AMD is still updating nine-year-old AM4 boards in 2026. Here's whether to upgrade within AM4 or switch to AM5, and what it actually costs UK buyers right now.
If you're weighing up an AM4 upgrade in 2026, AMD has just handed you a good reason to think twice before jumping straight to AM5. Motherboard vendors are still pushing fresh BIOS updates to A320 boards that are closing in on nine years old, patching firmware TPM flaws and keeping a platform alive well past the point most people assumed it was finished. That's not nostalgia talking. With DDR5 kits still priced well above where they sat eighteen months ago, sticking with a DDR4 platform and a cheap X3D chip is one of the few genuine budget moves left in PC building. The real question is whether an AM4 upgrade still stacks up on its own merits in 2026, or whether it's just postponing an AM5 purchase you'll end up making anyway.
Why AM4 refuses to die in 2026
Late August and early September 2026 saw a small wave of BIOS updates land for AM4's cheapest chipset. ASUS shipped BIOS 6265 for the PRIME A320M-A carrying a new AGESA ComboV2 microcode revision and fixes for a couple of fTPM vulnerabilities. Gigabyte followed with equivalent AGESA updates for its GA-A320M-H, A320M-D2P and A320M-HD3 boards. None of this is glamorous. It's the kind of maintenance patch that normally signals a platform winding down, not one still being actively supported nine years after launch.
It matters because AMD hasn't stopped selling AM4 hardware either. The Ryzen 5 5500F only reached US retail shelves recently, which tells you AMD still sees a market for brand new budget AM4 builds, not just upgrades for existing owners. That's unusual longevity for a socket first launched in 2016, and it's happening at exactly the moment DDR5 pricing is squeezing new AM5 and Intel builds hardest. We've covered why DDR5 relief isn't coming any time soon, and that context is doing a lot of the work here: every pound you don't spend on a DDR5 kit is a pound you can put towards a better GPU or a bigger SSD.
What upgrading within AM4 actually buys you
The two chips worth knowing about are the Ryzen 7 5700X3D and the older Ryzen 7 5800X3D. Both are Zen 3 parts with 3D V-Cache, and both remain genuinely strong 1080p and 1440p gaming CPUs even against some newer silicon, because game engines respond disproportionately well to the extra cache. If you already own a Ryzen 3000 or 5000 series CPU on a B450, B550 or X570 board, dropping in a 5700X3D is close to the best pound-for-pound upgrade available anywhere in the current market. You keep your case, cooler, PSU, RAM and motherboard, and you get a genuine gaming uplift for the price of one component.
Check compatibility on our CPU category page before buying, and if you're unsure what actually separates these chips from AMD's current lineup, our CPU buying guide covers the difference between core count, cache and clock speed in plain terms.
The chipset catch: A320 boards need a reality check
Here's where the recent news gets more complicated than the headlines suggest. AMD's own official compatibility lists for 5000 series X3D chips name X570, X470, X370, B550, B450 and B350 but conspicuously leave out A320. So even with the newest BIOS installed, an A320 board isn't guaranteed official support for a 5700X3D or 5800X3D. Some boards will run it anyway thanks to how flexible AGESA has become, but "probably works" isn't the basis for a purchase, especially when a replacement board costs more than the CPU you're trying to install.
If you're on A320 and want an AM4 upgrade, budget for a secondhand B450 or B550 board alongside the CPU, or check your exact model against the vendor's support page first. Our motherboard BIOS compatibility guide walks through exactly how to do that before you buy anything, because a mismatched socket and BIOS revision is the single most common reason new PC builds don't boot first time.
The case for switching to AM5 instead
None of this makes AM4 the automatically correct choice. AM5 is where AMD's actual development effort sits, and chips like the 7800X3D, 9800X3D and 9950X3D outperform anything AM4 can offer, sometimes by a wide margin once you're pushing 1440p or higher with a capable GPU. AM5 also has years of upgrade runway left, where AM4 genuinely does not: the 5700X3D and 5800X3D are close to the ceiling of what that socket will ever support. If you're comparing the 9800X3D against its bigger sibling for a fresh build, our 9800X3D vs 9950X3D guide breaks down which one actually earns its price gap.
The trade-off is DDR5. A new AM5 build means a DDR5 kit at today's inflated prices, plus a newer motherboard, even before you touch the CPU. That's real money on top of an already pricier chip, and it's the whole reason the AM4 route still has a pulse.
Weighing the total cost, not just the CPU price
The mistake most people make with this decision is comparing CPU prices in isolation. Compare the whole basket instead.
| Staying on AM4 | Switching to AM5 | |
|---|---|---|
| CPU cost | Low (5700X3D/5800X3D, often discounted) | Higher (7800X3D and up) |
| Motherboard | None needed if B450/B550/X570 already owned | New board required |
| RAM | Keep existing DDR4 | New DDR5 kit required |
| Upgrade runway | Effectively none beyond this chip | Multiple CPU generations ahead |
| Best for | Owners of existing B450/B550/X570 systems wanting more gaming performance now | New builds, or AM4 owners who also need more RAM, PCIe 5.0 storage, or a platform that lasts |
Current pricing moves often enough that quoting exact figures here would be out of date within weeks. Check our live CPU, motherboard and RAM pages for what each route costs today before deciding, rather than relying on a number from a review published months ago.
Which AM4 chipset actually matters if you're staying put
Not all AM4 boards are equal, and the chipset still decides more than most buyers expect.
- B450 and B550: the sensible minimum for an X3D upgrade. Widely supported, plentiful BIOS updates, and cheap secondhand if you need to replace a board.
- X570: overkill for most gaming builds today, but worth keeping if you already own one for its PCIe 4.0 storage lanes.
- A320: budget-only, and now a genuine compatibility risk for the CPUs that make an AM4 upgrade worth doing in the first place. Treat any A320 board as needing a companion board upgrade, not just a CPU swap.
Our verdict
If you're already running a B450, B550 or X570 board with a Ryzen 3000 or 5000 series CPU, a 5700X3D is one of the best value upgrades available in the UK market right now, full stop. You're not fighting DDR5 pricing, you're not buying a new board, and you're getting a meaningful gaming uplift for one component's worth of spend.
If you're on A320, or building a PC from nothing, the maths changes. Factor in a replacement motherboard and you've eroded most of AM4's price advantage, and at that point AM5's extra upfront RAM cost buys you several more years of upgrade headroom that AM4 simply can't offer any more. Browse our full component range to compare both routes on current UK pricing before you commit either way.
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This article was written with the assistance of AI tools and reviewed by a human editor. Price data is sourced from Amazon UK. For more information, see our About page.