2
Introducing the Motherboard
Feature
• Accommodates Intel® Core™ 2 Extreme (FSB 1333 MHz OC)/
Core™ 2 Quad/
Core™
2 Duo/Pentium D/Pentium 4/Celeron D pro-
cessors
• Supports a system bus (FSB) of 1333 (overclocking)/1066/800/
533 MHz
• Supports “Hyper-Threading” technology CPU
NVIDIA nForce® 650i SLI™ Intel Edition media and communications processors
(MCPs) provide features designed with the gamer in mind with NVIDIA® SLI™.
The C55 Northbridge (NB) and MCP51 Southbridge (SB) chipsets are based on an
innovative and scalable architecture with proven reliability and performance.
“Hyper-Threading” technology enables the operating system into thinking it’s
hooked up to two processors, allowing two threads to be run in parallel, both on
separate “logical” processors within the same physical processor.
Processor
Chipset
This motherboard uses an LGA775 Intel® Core™ 2 Extreme (FSB 1333 MHz
OC)/Core™ 2 Quad/Core™
2 Duo/Pentium D/Pentium 4/Celeron D that carries
the following features:
Onboard LAN
Memory
• DDR2 800/667/533/400 DDR2 SDRAM with Dual-channel DDR2
architecture
• Accommodates four unbuffered DIMMs, 8 GB per DIMM with maxi-
mum memory size up to 32 GB
C55 (NB)
MCP51 (SB)
• HyperTransport x8 up and x8 down link at up to
1000 MHz to the next-generation MCPs.
• Four independent PCI Express controllers with 18
total lanes, configured as one x16 and two x1
PCI Express lanes or
two x8 and two x1 PCI Express lanes
• 128-bit dual channel DDR2 supporting up to four
DDR2-800 DIMMs
• Full ACPI 3.0 and PCI PM 1.1 support and power
management
• HyperTransport x4/x8 up and down links, at up to
800 MHz
• Compliant with PCI 2.3 specification
• Integrated SATA 3.0 Gb/s Host Controller
• Fast ATA-133 IDE controller
• USB 2.0 EHCI and USB 1.1 OHCI Controller, support-
ing up to 8 ports
The onboard LAN controller provides the following features:
• Integrated 10/100 Fast Ethernet Transceiver
• Reduced Gigabit Media Independent Interface (RGMII)
• IEEE802.3u Auto-Negotiation support for automatic speed and
duplex selection
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