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Intel Pentium Extreme Edition 955

The Presler processor family includes a few Pentium D 900 CPUs and a Pentium Extreme Edition 955 solution for gamers and hardware enthusiasts. These processors differ by their clock frequencies, system bus frequency and availability or absence of the Hyper-Threading technology. Pentium D 900 processors support 2.8-3.4GHz frequencies and use 800MHz system bus. The ratings of the processor models in this family vary from 920 to 950 with the increment of 10. Moreover, Pentium D CPUs do not support Hyper-Threading technology, so the OS sees them as two logical processors.

As for the Pentium Extreme Edition 955, this CPU uses 1066MHz system bus, works at 3.46GHz clock speed and supports Hyper-Threading technology. As a result, the OS sees this process as four logical CPUs. These are exactly the features that determine its positioning for the high-end price segment.

Also it is important to point out that all Presler processors support 64-bit x86 EM64T extensions, EIST power management technology and Intel Virtualization Technology.

The table below sums up all the features of the CPUs in the Presler family:

We received the top model from the family for our tests – Pentium Extreme Edition 955. the processor was formally announced today, on December 27, 2005, however, it is not yet available for sale. The CPU will start shipping in mass quantities to OEMs and system integrators on January 16, 2006. This CPU will be priced at $999, just like any other solutions targeted for wealthy hardware enthusiasts.

Let’s take a look at the formal CPU specifications:

Pentium Extreme Edition 955


3.46 GHz


775-pin PLGA



Bus frequency

1066 MHz

Typical heat dissipation


Core stepping

Max typical packaging temperature


L2 cache

2MB + 2MB

Production process

65 nm

Hyper-Threading Technology support


Intel Extended Memory 64 Technology (EM64T)


Execute Disable Bit Feature (NX)


Enhanced Intel SpeedStep (EIST)


Intel Virtualization Technology (VT)


It catches your eye right away that the new 65nm manufacturing technology didn’t really affect the thermal and electrical parameters of the CPU. The working core voltage got only 5% smaller, while heat dissipation and maximum die temperature remained almost the same as those of the similar processor models manufactured with 90nm process. However, you shouldn’t forget that the new Pentium Extreme Edition 955 features a twice as large L2 cache as that of the Pentium Extreme Edition 840 and works at 8% higher clock frequency. So, there still is some effect from the 65nm production technology.

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