Netburst Microarchitecture On 90Nm Silicon Process Technology - HP 124708-001 - ProLiant Cluster - 1850 Introduction Manual

HT Technology also puts a heavier load on the OS to allocate threads and switch contexts on the
device. Evaluating the threads for parallelism and context switching are OS tasks and increase the
operating overhead.
HT Technology presents little in the way of software licensing issues. Intel asserts that the HT design is
still only a single-processor unit, so customers should not have to purchase two software licenses for
each processor. This is true for Microsoft SQL Server 2000 and Windows Server 2003, which only
require one license for each physical processor, regardless of the number of logical processors it
contains. However, Windows 2000 Server does not make this distinction between physical and
logical processors and fills the licensing limit based on the number of processors the BIOS discovers
at boot.
According to Intel, the system requirements for HT Technology are as follows:
• A processor that supports HT Technology
• HT Technology-enabled chipset
• HT Technology-enabled system BIOS
• HT Technology-enabled/optimized operating system
For more information, refer to http://www.intel.com/products/ht/hyperthreading_more.htm.

NetBurst microarchitecture on 90nm silicon process technology

In 2004, Intel introduced major improvement to the Pentium 4 and Xeon processor lines by changing
the manufacturing process from 130nm to 90nm silicon process technology and adding numerous
enhancements:
• Larger, more effective caches (1MB or 2-MB L2 Advanced Transfer Cache compared to 512-KB on
the 0.13 micron Pentium 4 processor)
• Faster processor bus: a 64-bit, 200-MHz bus capable of providing 6.4 GB/s of bandwidth by
double pumping the address and quad pumping the data. The 200-MHz quad-pumped data bus is
also referred to as an 800-MT/s data bus.
• Extended hyper-pipeline (31 stages versus 20 stages) to enable high CPU core frequencies
(described below)
• Enhanced execution units including the addition of a dedicated integer multiplier, and support for
shift and rotate instruction execution on a fast ALU
• Improved branch prediction to help compensate for longer pipeline
• Streaming SIMD Extensions 3 (SSE3) instructions (described below)
• Larger execution schedulers and execution queues
• Improved hardware memory prefetcher
• Improved Hyper-Threading
• 64-bit extensions (described below)
• Two-core (for Smithfield, Dempsey, and Paxville)
For more information, read the white paper "Introducing the 45nm next-generation Intel® Core™
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microarchitecture at Intel® 45nm Hi-k silicon technology.
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