Do you prefer ECC Ram in dedicated servers ??

If you have both ECC and non-ECC, go for ECC. Especially with old hardware that supports old DDR4 or DDR3 RAM, ECC is a must.

OVH is deploying Zen 5 Ryzen and Epyc 4004 servers with DDR5 On-Die ECC. Their upcoming Epyc 4005 servers will also have On-Die ECC.

If you have the option and want it go for it. We have customers with it and without it on different systems. Mostly more desktop grade systems some clients tend to go without it while others will pay extra to have it.

Ryzens for example can support it and some clients want it. It costs quite a bit more money on those systems to buy the ECC Ram.
Most other systems should all be ECC by default EPYCS and Intel Xeon's.

Yes in most cases ECC RAM (Error-Correcting Code RAM) is the better choice for dedicated servers. It can detect and correct single-bit memory errors automatically, preventing data corruption. For hosting, virtualization, or financial/medical applications, data integrity is more important than raw speed. Typically 10–20% more expensive than standard RAM. If it’s a production dedicated server handling customers, I’d go with ECC RAM every time. The extra cost is worth the peace of mind.

For a few extra bucks, why would you use anything other than ECC? I certainly sleep better knowing this is part of an IT strategy.

It's a no-brainer

Most servers today only allow for ECC. non ecc is for home use.