Q: Can I use three 1G double sided DDR400 DIMMs on the KV8-MAX3?
A: Yes you can, but according to the limitation of the CPU, it will not be operating at DDR400. Since the memory controller is integrated into the AMD Athlon 64 CPU, it depends on the CPU you are using. If you are using a C0 stepping CPU, you will have to set the system to DDR266 to make three 1G modules work. If you are using a CG stepping CPU, you can set it to DDR333.