Comparing the Intel Core 2 Quad Processors
  Intel® Core™2 Extreme Processor QX6850 Intel® Core™2 Extreme Processor QX6800 Intel® Core™2 Extreme Processor QX6700 Intel® Core™2 Extreme Processor X6800 Intel® Core™2 Quad Processor Q6700 Intel® Core™2 Quad Processor Q6600
Processor Number Δ QX6850 QX6800 QX6700 X6800 Q6700 Q6600
Where to buy a PC Where to Buy Where to Buy Where to Buy Where to Buy Where to Buy Where to Buy
Where to buy boxed products Where to Buy Where to Buy Where To Buy (ATX) Where To Buy (ATX) Where to Buy Where To Buy
Architecture 65 nanometer technology 65 nanometer technology 65 nanometer technology 65 nanometer technology 65 nanometer technology 65 nanometer technology
L2 Cache 8M 8M 8M 4M 8M 8M
L3 Cache N/A N/A N/A N/A N/A N/A
Clock Speed 3 GHz 2.93 GHz 2.66 GHz 2.93 GHz 2.66 GHz 2.40 GHz
Front Side Bus Speed 1333 MHz 1066 MHz 1066 MHz 1066 MHz 1066 MHz 1066 MHz
Other Intel Technologies Intel® 64Ø,
EIST*,
Quad-Core,
XD°,
IVT		 Intel® 64Ø,
VT±,
EIST*,
Quad-Core,
XD°		 Intel® 64Ø,
VT±,
Execute Disable Bit°,
EIST*,
Quad-Core		 Intel® 64Ø,
VT±,
Execute Disable Bit°,
Multi-Core,
EIST*		 Intel® 64Ø,
EIST*,
Quad-Core,
XD°,
IVT		 Intel® 64Ø,
VT±,
Execute Disable Bit°,
EIST*,
Quad-Core
Package FC-LGA 775-land LGA FC-LGA FC-LGA FC-LGA FC-LGA
Chipset N/A Intel® 975X Express Chipset,
Intel® P965 Express Chipset		 Intel® 975X Express Chipset Intel® 975X Express Chipset,
Intel® P965 Express Chipset		 N/A Intel® 975X Express Chipset,
Intel® P965 Express Chipset
Memory Type NA NA NA NA NA NA
Boards NA Intel® Desktop Board DP965LT Intel® Desktop Board D975XBX2 Intel® Desktop Board DP965LT NA Intel® Desktop Board D975XBX
Slot/Socket Type LGA775 LGA775 LGA775 LGA775 LGA775 LGA775
Pin Count 775-land 775-land 775-land 775-land 775-land 775-land
sSpec Number SLAFN SL9UK SL9UL SL9S5 SLACQ SL9UM
Δ Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See http://www.intel.com/products/processor_number/ for details.

† Look for systems with the Intel® Pentium® 4 Processor with HT Technology logo and also including an Intel® 925X or 915 Express Chipset (see the product spec sheet or ask your salesperson). Performance and functionality will vary depending on (i) the specific hardware and software you use and (ii) the feature enabling/system configuration by your system vendor. See http://www.intel.com/info/hyperthreading for information on HT Technology or consult your system vendor for more information.

± Intel Virtualization Technology requires a computer system with a processor, chipset, BIOS, virtual machine monitor (VMM) and applications enabled for virtualization technology. Functionality, performance or other virtualization technology benefits will vary depending on hardware and software configurations. Virtualization technology-enabled BIOS and VMM applications are currently in development.

ø Intel® EM64T requires a computer system with a processor, chipset, BIOS, operating system, device drivers and applications enabled for Intel EM64T. Processor will not operate (including 32-bit operation) without an Intel EM64T-enabled BIOS. Performance will vary depending on your hardware and software configurations. See www.intel.com/info/em64t for more information including details on which processors support Intel EM64T or consult with your system vendor for more information.

° Enabling Execute Disable Bit functionality requires a PC with a processor with Execute Disable Bit capability and a supporting operating system. Check with your PC manufacturer on whether your system delivers Execute Disable Bit functionality.

∗ Enhanced HALT State (C1E) and Enhanced Intel SpeedStep® Technology (EIST) for specified units of this processor available Q2/06. See the Processor Spec Finder at http://processorfinder.intel.com or contact your Intel representative for more information.

©Intel Corporation