The AMD Athlon 64 3500+ ADA3500BPBOX processor is a brand new sealed box containing a AMD Athlon 64 CPU. With 512 KB of L2 cache, a clock speed of 2.2 GHz, and a bus speed of 2000 MHz, this processor is designed for high performance and efficient processing. The processor features a single core and is compatible with socket 939 motherboards, making it a reliable choice for upgrading or building a computer system.