Processor Features And Operation; Intel Pentium 4 Processor 551 - Intel 945G - Bulk Single Unit Atx Exp User Manual

2.4

Processor Features and Operation

The following section provides a detailed view at processor features and operation.
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2.4.1 Intel Pentium
The main different between the Pentium 4 processor 550 and the 551 is that the 551
supports Intel
rest of the features are the same.
The Intel Pentium 4 processor 551 supports Intel
(EM64T) as an enhancement to the IA-32 Intel
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
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
• Enhanced branch prediction
• 16 KByte Level 1 data cache
• 1 MByte Advanced Transfer Cache (on-die, full-speed Level 2 (L2) cache) with 8-
way 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
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Intel 945G Express Chipset Development Kit User's Manual
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4 Processor 551
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Extended Memory 64 Technology (EM64T), while the 550 does not. The
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microarchitecture front side bus uses a split-transaction,
⎯ Advance Dynamic Execution
⎯ Very deep out-of-order execution
Development Kit Features
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Extended Memory 64 Technology
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Architecture. This enhancement enables
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