That's not right. RISC means "Reduced Instruction Set Computing". One of the most import things on RISC CPUs is that memory can only be access with "load" and "store" operation and no direct memory addressing is possible. We all know very well that this is neither true on x86 nor on x64 CPUs.

All x86 and x64 CPUs are CISC CPUs, meaning "Complex Instruction Set Computing".