Intel Pentium D microprocessor family
Pentium D is a family of Dual-core microprocessors based on Intel
NetBurst micro-architecture. The Pentium D CPUs have almost all
features of Prescott
/ Cedar Mill
microprocessors - same size of level 1 instruction opcode and data
caches, 1 or 2 MB level 2 cache per core, support for SSE3
instructions, Extended Memory 64 Technology and Execute Disable bit
capability. The dual-core processors do not include HyperThreading
technology. The Pentium D CPUs have higher power consumptions than
Pentium 4 processors, but not significantly higher.
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Picture of: Intel Pentium D 820 - HH80551PG0722MN / BX80551PG2800FN / BX80551PG2800FT
The first generation of Pentium D processors was built on Smithfield core, which was essentially two Prescott Pentium 4 dies in one package. Predictably, many processor features in Pentium D were the same as in the Pentium 4 line of processors. Each core in Pentium D CPU had instruction trace cache with approximately 12K microoperations, 16 KB level 1 data cache and 1 MB level 2 cache. All Smithfield processors included EM64T and execute disable bit features, but none of the processors supported HyperThreading technology. Pentium D CPUs with Smithfield core were offered in frequencies up to 3.2 GHz and had noticeably higher power consumption than Pentium 4 CPUs. The Pentium D microprocessors were manufactured in 775-land LGA package, and they were usually compatible with existing socket 775 motherboards. All Smithfield processors had 8xx processor numbers.
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Picture of: Intel Pentium D 915 - HH80553PG0724MN / BX80553915 / BX80553915R
Next generation of Pentium D microprocessors, based on Presler core, was released less than year after the Smithfield core. Presler Pentium D processors were built on a more modern 0.065 micron technology, which allowed them to reach higher clock frequencies, and double the size of L2 cache. The main advantage of the Presler CPUs, though, was their lower power consumption. Performance-wise Presler CPUs were not much faster than Smithfield processors at the same frequency - Presler's larger L2 cache provided only minor, up to 5%, boost in performance. Some Pentium D processor with Presler core included Virtualization technology. All Presler processors had 9xx processors numbers, and, like the previous generation of Pentium D CPUs, were manufactured in 775-land LGA (socket 775) package.
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At a glance
Type:
64-bit microprocessor
Technology (micron):
0.065, 0.09
The number of cores:
2
Frequency (GHz):
2.66 - 3.6
L2 cache size (MB):
2, 4
Sockets:
Socket 775