Performance/Mainstream Desktop Chipsets Comparison Chart

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 Intel® 975X Express Chipset
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Host975X Chipset
Target SegmentPerformance PC,
Mobile/Mainstream PC
Processor PositionedIntel® Pentium® 4 processor supporting Hyper-Threading Technology,
Intel® Pentium® D processor,
Intel® Pentium® 4 processor Extreme Edition supporting Hyper-Threading Technology,
Intel® Extreme Edition,
Intel® Core™2 Duo Processor,
Intel® Core™2 Extreme Processor
ProcessorLGA775
Hyper-Threading Technology1Optimized for HT Technology
System Bus1066/800 MHz
Max Memory8 GB
Memory Modules2 DIMMs/channel, 2 channels
Memory TypeDual-Channel DDR2
FSB/Memory Configurations1066/DDR2-533,
800/DDR2-533,
1066/DDR2-667,
800/DDR2-667
Integrated Graphics TypeN/A
External Graphics InterfaceDual PCI Express* x16
PCI SupportPCI Express* X 1 (4 or 62)
Storage Interface/PortsSATA (3 Gbps)/4 PATA/1
Storage TechnologyIntel® Matrix Storage Technology with ICH7R
Memory Controller Hub82975X MCH
Supported Intel I/O ControllerICH7, ICH7R
PCI Masters6
USB Ports/Controllers8 ports, USB 2.0
AudioIntel® High Definition Audio, AC’97/20-bit audio
Security 
1 Hyper-Threading Technology requires a computer system with an Intel® Pentium® 4 Processor supporting Hyper-Threading Technology and a HT Technology enabled chipset, BIOS and operating system. Performance will vary depending on the specific hardware and software you use. See http://www.intel.com/info/hyperthreading/ for more information including details on which processors support HT Technology.
2 Six PCI Express* x1 device/peripheral support available when combined with the Intel® 82801GR (ICH7R) I/O controller only.
Intel® processors, chipsets and graphics products may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request.