Pentium D and Pentium Extreme Edition 900 series CPUs are based on Presler die, which has 376 million transistors occupying an area of 162 mm2 (0.25 sq inch) and manufactured using 65-nm technology.

click to enlarge
Figure 2: Presler die.

The main features of Pentium D and Pentium Extreme Edition 900 series are the following:

• Dual-core technology
• 16 KB L1 data cache
• 4 MB L2 memory cache (2 MB per core)
• 800 MHz external bus (200 MHz transferring four data per clock cycle) on Pentium D or 1,066 MHz external bus (266 MHz transferring four data per clock cycle) on Pentium Extreme Edition.
• SSE3 instruction set support
• Socket 775
• 65-nm manufacturing process
• Virtualization Technology
• EM64T 64-bit Technology
• Execute Disable Technology
• Enhanced SpeedStep Technology
• HyperThreading technology on Pentium Extreme Edition (Pentium D doesn’t have this feature).

On the table below you can find all Pentium D (listed as “Hyper Threading: No”) and Pentium Extreme Edition (listed as “Hyper Threading: Yes”) from 900 series released to date.