DDR5 doesn’t need a new power supply.

No, you almost never need to upgrade your PSU just for DDR5.

The power draw difference between DDR4 and DDR5 is tiny — we’re talking maybe 5–10 watts per stick. Your existing PSU won’t even notice. The voltage spec is slightly different (1.1V vs 1.2V for DDR4), but modern power supplies handle that just fine because the motherboard’s voltage regulator module (VRM) does the conversion, not the PSU directly.

The real extra cost of DDR5 is the new motherboard and CPU that support it. That’s where your money goes, not into a bigger power supply.

If your current PSU is already old, underpowered for your GPU, or running near its limit, then sure, an upgrade might be good. But that’s a separate conversation. DDR5 alone won’t push you over the edge.

Don’t stress about the power supply. Focus on whether your motherboard and CPU budget can handle the DDR5 premium.