I'm thinking about upgrading from my decade-old computer, but I'm really frustrated with current RAM prices. I have a lot of old systems with varying types of memory: three with 32GB of DDR3, two with 64GB of DDR4, and even an old Xeon with 256GB of FBDDR2. My friend and I even picked up a computer last year with 768GB of registered DDR3 for under €1200 to experiment with some AI models. Although we fixed it up and upgraded it considerably, it's still slow for GPU-based AI since it doesn't have a GPU and it's cumbersome.
If there's any way to use at least some of that old RAM in a new Ryzen 9000 system (which I believe uses DDR5), it would help me wait out the RAM price cycle for a year or two before making a major upgrade. I remember when I bought 64GB of decent DDR4 for €160, and I feel like today's prices are just exorbitant. So, does anyone have any ideas?
4 Answers
Well, technically, you could attach all that old memory outside your case for display purposes. That would look impressive, and you’d certainly have the coolest setup for bragging rights! But good luck getting the Ryzen to access that RAM—it’s not going to happen.
Short answer: you can't use your old RAM. The Ryzen 9000 series supports only DDR5, and their integrated memory controller is not designed for DDR4 or earlier.
To be honest, I doubt there's a reliable way to convert DDR3 or DDR4 to fit DDR5 slots. Even if some adapters exist, they're likely not safe to use without risking your setup. The pinouts are different, and they’re not compatible at all. Trying to force them usually leads to disaster!
Yeah, and even if you could find such adapters, you'd end up voiding any warranty on your new system. Better to wait it out for affordable RAM upgrades.
There are devices that claim to let you use DDR3 in a DDR4 slot and DDR4 in a DDR5 slot, but I really wouldn't recommend it. It’s risky and could mess up your whole system. If you happen to have laptop SODIMM memory, it might be a bit easier, but still not advisable outside of testing.
Do you have any specific examples of those devices? I'd be curious to see how they claim to work.
Yeah, and regardless of what you might try, you'd end up creating compatibility issues, not to mention bottlenecks.