Intel 830 manual Introduction

Introduction

1Introduction

The Intel® Pentium® D processor extends Intel's Desktop dual-core product line. The Pentium D processor uses Flip-Chip Land Grid Array (FC-LGA4) package technology, and plugs into a 775- land LGA socket, referred to as the LGA775 socket. The Pentium D processor, like the Intel® Pentium 4 processor in the 775-land package, utilizes the Intel NetBurst® microarchitecture and maintains the tradition of compatibility with IA-32 software.

The Intel® Pentium® D processor supports Intel® Extended Memory 64 Technology (Intel® EM64T)Φ as an enhancement to Intel's IA-32 architecture, on server and workstation platforms. This enhancement enables the processor to execute operating systems and applications written to take advantage of Intel EM64T. Further details on the 64-bit extension architecture and programming model can be found in the Intel® 64-bit Extension Technology Software Developer's Guide at http://developer.intel.com/technology/64bitextensions/.

Note: In this document the Pentium D processor 800 sequence is also referred to as the Pentium D processor or simply as the processor.

The Pentium D processor functions as two physical processors in one package. This allows a duplication of execution resources to provide increased system responsiveness in multitasking environments, and headroom for next generation multithreaded applications and new usages.

The Pentium D processor supports all the existing Streaming SIMD Extensions 2 (SSE2) and Streaming SIMD Extensions 3 (SSE3). Streaming SIMD Extensions 3 (SSE3) are 13 additional instructions that further extend the capabilities of Intel processor technology. These new instructions 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 FSB uses a split-transaction, deferred reply protocol like the Intel Pentium 4 processor. The Intel NetBurst microarchitecture FSB uses Source- Synchronous Transfer (SST) of address and data to improve performance by transferring data four times per bus clock (4X data transfer rate, as in AGP 4X). 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. Working together, the 4X data bus and 2X address bus provide a data bus bandwidth of up to 6.4 GB/s.

The Pentium D processor includes the Execute Disable Bit capability. This feature, combined with a supported operating system, allows memory to be marked as executable or non-executable. If code attempts to run in non-executable memory the processor raises an error to the operating system. This feature can prevent some classes of viruses or worms that exploit buffer over run vulnerabilities and can thus help improve the overall security of the system. See the Intel® Architecture Software Developer's Manual for more detailed information.

Intel will enable support components for the processor including heatsink, heatsink retention mechanism, and socket. Manufacturability is a high priority; hence, mechanical assembly may be completed from the top of the baseboard and should not require any special tooling.

The processor includes an address bus powerdown capability that removes power from the address and data pins when the FSB is not in use. This feature is always enabled on the processor.

Enhanced Intel SpeedStep® Technology allows trade-offs to be made between performance and power consumptions. This may lower average power consumption (in conjunction with OS support).

Datasheet 11