The AMD Athlon 64 X2 Dual-Core processor puts the power of dual-core technology on the desktop. Dual-core processors contain two processing cores, residing on one chip, that perform calculations on two streams of data, thereby increasing efficiency and speed while running multiple programs and the new generation of multi-threaded software. For user this means a significant increase in response and performance when running multiple applications simultaneously. The AMD Athlon 64 X2 Dual-Core processor outperforms the highest-performing AMD Athlon 64 4000+ single-core processor on multi-tasking benchmarks by up to 30%. Dual-core technology is like having two processors working together, each one taking care of different applications, so power-users actually experience greater performance when multiple applications are running. The AMD Athlon 64 X2 Dual-Core processor is designed for people who want to stay at the forefront of technology and for those who depend on their PCs to keep them connected, informed, and entertained. Systems based on AMD Athlon 64 processors are able to deliver leading-edge performance for demanding productivity and entertainment software today and in the future. Sixteen 64-bit integer registers, 128-bit SSE/SSE2/SSE3 registers AMD Digital Media XPress provides support for SSE, SSE2, SSE3 and MMX instructions A high-bandwidth, low-latency integrated DDR memory controller Supports PC2-6400 (DDR2-800), PC2-5300 (DDR2-667), PC2-4200 (DDR2-533) or PC2-3200 (DDR2-400) SDRAM unbuffered DIMMs Support for 64-bit DDR2 SDRAM memory Up to 12.8GB per seconds memory bandwidth One 16-bit link up to 2000MHz Up to 8GB per seconds HyperTransport I/O bandwidth Up to 20.8GB per seconds total delivered processor-to-system bandwidth Large high performance on-chip cache 64KB Level 1 instruction cache per core 64KB Level 1 data cache per core Up to 1MB Level 2 cache per core Cool'n'Quiet te