Intel 945G User Manual - Page 15

Intel® 945G Express Chipset Development Kit User's Manual Development Kit Features 2.4 2.4.1 Processor Features and Operation The following section provides a detailed view at processor features and operation. Intel® Pentium® 4 Processor 551 The main different between the Pentium 4 processor 550 and the 551 is that the 551 supports Intel® Extended Memory 64 Technology (EM64T), while the 550 does not. The rest of the features are the same. The Intel Pentium 4 processor 551 supports Intel® Extended Memory 64 Technology (EM64T) as an enhancement to the IA-32 Intel® Architecture. This enhancement enables the processor to execute operating systems and applications written to take advantage of EM64T features. With appropriate 64-bit supporting hardware and software, platforms based on an Intel processor supporting EM64T can use extended virtual and physical memory. In addition to supporting all the existing Streaming SIMD Extensions 2 (SSE2), there are 13 new instructions that further extend the capabilities of Intel processor technology. These new instructions, called Streaming SIMD Extensions 3 (SSE3), enhance the performance of optimized applications for the digital home such as video, image processing, and media compression technology. The processor's Intel NetBurst® microarchitecture front side bus uses a split-transaction, deferred reply protocol. The NetBurst microarchitecture FSB uses source-synchronous transfer (SST) of address and data to improve performance by transferring data four times per bus clock. Along with the 4x data bus, the address bus can deliver addresses two times per bus clock and is referred to as a "double-clocked" or 2x address bus. Features of the processor include: • Binary compatible with applications running on previous members of the Intel microprocessor line • NetBurst microarchitecture • System bus frequency at 533/800 MHz • 775-Land LGA Package • Supports EM64T Technology • Rapid Execution Engine: arithmetic logic units (ALUs) run at twice the processor core frequency • Supports Hyper-Threading Technology (HT Technology) • Hyper Pipelined Technology ⎯ Advance Dynamic Execution ⎯ Very deep out-of-order execution • Enhanced branch prediction • 16 KByte Level 1 data cache • 1 MByte Advanced Transfer Cache (on-die, full-speed Level 2 (L2) cache) with 8way associatively and Error Correcting Code (ECC) • 144 Streaming SIMD Extensions 2 (SSE2) and 13 Streaming SIMD Extensions 3 (SSE3) instructions. • Enhanced floating point and multimedia unit for enhanced video, audio, encryption, and 3D performance • Power management capabilities Reference #308823 15