512MB kit (2x256MB) DDR400 DIMM Memory for Apple Power Mac G5 (late 20 – Aplus Technology
Bewinner DDR Laptop RAM, 200Pin Mini DDR1 1GB 400Mhz PC3200 Memory RAM,Suitable for PC3200 DDR1 400 Memory Laptop,Provides Better Performance and Less Consumption at Amazon.com
You may have your DDR4, but i have DDR400! : r/pcmasterrace