Intel's Leading Microprocessors Mobile Intel® Pentium® III processor - M Mobile Intel® Pentium® 4 processor - M Intel® Pentium® M processor Intel® Celeron® M processor Intel® Celeron® M processor 6 Intel® Core™ Duo  processor Intel® Core™ Solo  processor Intel® Core™ 2 Duo  mobile processor Single or Dual Core Single Single Single Single Single Dual-Core Single Dual-Core On-die L2 cache 512 KB 512 KB or 1MB 1 MB or 2 MB 512 KB or 1MB 1MB 2MB 2MB 2MB or 4MB Processor system bus 133 MHz 400 MHz or 533 MHz 400 MHz or 533 MHz 400 MHz 533 MHz 667 MHz 667 MHz 667 MHz Processor frequency up to 1.33 GHz 3.33 GHz 2.26 GHz 1.60 GHz 1.73 GHz 2.33GHz 1.83 GHz 2.33 GHz Power-optimized processor system bus No No Yes Yes Yes Yes Yes Yes Intel® Advanced Thermal Manager with per-core Digital Temperature Sensors  No No No No Yes Yes Yes Yes Intel® Mobile Voltage Positioning (Intel® MVP IV) No No Yes Yes Yes Yes Yes Yes Intel's Recommended Chipsets Intel® 830 Chipset Family Intel® 845 Chipset Family Intel® 855 Chipset Family or Mobile Intel® 915 Express Chipset Family Intel® 855 Chipset Family or Mobile Intel® 915 Express Chipset Family   Mobile Intel® 945 Express Chipset Family Mobile Intel® 945 Express Chipset Family  Mobile Intel® 945 Express Chipset Family Mobile Intel® 945 Express Chipset Family Support up to 2GB of DDR24 No No Yes Yes Yes Yes Yes Yes USB 2.0 support No No3 Yes Yes Yes Yes Yes Yes Discrete and integrated graphics chipset solutions Yes No3 Yes Yes Yes Yes Yes Yes Dynamic Cache Sizing No No No No Yes Yes Yes Yes Intel's Verified Wireless Solution N/A N/A Intel® PRO/Wireless Network Connection Intel® PRO/Wireless Network Connection Intel® PRO/Wireless Network Connection Intel® PRO/Wireless Network Connection Intel® PRO/Wireless Network Connection Intel® PRO/Wireless Network Connection Single & dual band support (802.11b, 802.11a/b, 802.11b/g, 802.11 a/b/g) N/A N/A Yes Yes Yes Yes Yes Yes Industry standard and extended wireless security support (LEAP, WPA, 802.1x, WEP)5 N/A N/A Yes Yes Yes Yes Yes Yes Intel® PROSet with advanced profile management support5 N/A N/A Yes Yes Yes Yes Yes Yes Power Saving Technology N/A N/A PSP2 PSP NCPA NCPA NCPA NCPA

¹ Mobile Intel® Pentium® III and Mobile Intel Pentium 4 processors - M have support for Enhanced Intel Speedstep technology without multiple voltage and frequency operating points.
² Available with Intel® Centrino® mobile technology.
³ Available with Intel® 852GM chipset, an additional chipset option for the Mobile Intel Pentium 4 Processor - M. 
⁴ DDR2 support only available with the Intel® 915M Express Chipset Family
⁵ Wireless connectivity and some features may require you to purchase or download additional software, services or external hardware. Availability of public wireless LAN access points limited. System performance measured by MobileMark* 2002. System performance, battery life, wireless performance and functionality will vary depending on your specific hardware and software configurations.
⁶ The newest versions of the Intel® Celeron® M processor is built on Intel’s next generation 65 nanometer process technology with copper interconnect. The Yonah-based Intel® Celeron® M Processor 410, 420, 430, 440, and 450 and the the Merom-based Intel® Celeron® M Processor 520 have been designed to work with the Mobile Intel® 945 Express Chipset Family. The newer processors have a frequency range up to 1.73GHz. These new processors will not work with mobile systems based upon older chipsets such as the Intel® 855 Chipset Family or the Mobile Intel® 915 Express Chipset Family.

This applies to:

Intel® Core™ Duo Processor Intel® Core™ Solo processor Intel® Core™2 Duo Mobile Processor Intel® Pentium® M Processor Intel® PRO/Wireless 3945ABG Network Connection Mobile Intel® 945 Express Chipset Family Mobile Intel® 945GM Express Chipset Family Mobile Intel® Pentium® 4 Processors - M Mobile Intel® Pentium® III Processor