The 5600G won't do ECC. Get the Pro chip or go Intel.
Technically no. AMD locks ECC support behind the PRO SKUs on the 5000G series. Some motherboard BIOSes might give you the option, but it’s not validated and may not actually correct errors — it could just be reporting them.
The 5600G itself doesn’t have the memory controller wired for ECC outside of PRO chips. A few board vendors have experimented with enabling it, but you’re gambling on firmware quirks and hoping Windows or Linux actually honors the error correction instead of just logging errors.
If you want real ECC for your NAS, either buy the 5600G PRO (harder to find retail but they exist) or switch to an Intel platform that supports unbuffered ECC on consumer CPUs (like Core i3 or i5 with W680 chipset). It’s more straightforward and you won’t spend weekends troubleshooting.
The non-PRO 5600G is a great chip — just not for reliable ECC.
