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Chapter 1 19
South Bridge
CPU Fan True Value Table
• Throttling 50%: On = 97°C; Off = 88°C
• OS Shut down: 105°C
• H/W Shut down: 110°C
• Fan default 3.5V
System Clock
Item Specification
Type AMD SB700 (South Bridge)
Package FCBGA 528-pin
Features
• A-Link Express II interface to AMD Northbridge: High data
transfer Bandwidth up to 2.5GT/s/Lane.
• PCI bus support Rev 2.3
• USB controllers: 5 OHCI and 2 EHCI Host controllers to
support 12 USB 2.0 Ports and 2 dedicated USB 1.1 ports.
• SATA controllers: Supports six SATA ports with transfer rates
up to 3Gb/s
• Supports both SATA 1.5 and SATA 3.0 compliance devices;
Supports e-SATA.
• AMD RAID support and AMD AHCI support.
• Interrupt controller: Support IOAPIC/X APIC mode for 24
channels of interrupt.
• High definition Audio supports up to 4 codec’s and up to 192
KHZ sample rate and 32-bit Audio.
• Flash controller supports ReadyBoost and ReadyDrive
features of windows Vista.
Power 1.2V,3.3V,5V, 1.8V
CPU Temp (°C) Fan Speed (rpm) dB (A)
<48 0 0
52 3100 31
60 3500 34
70 4100 37
90 4500 40
Item Specification
System clock chip SLG8SP628VTR or pin compatible device
Package 64 pin QFN
Clock Synthesizer
• 200Mhz for CPU, RS780M
• 100MHz clock buffer for RS780M, SB700 and PCI-E devices
96MHz for RS780M
• 48Mhz for USB clock inside SB700
• 33Mhz PCI clock for PC devices, SIO, LPC
Power 3.3V,1.2V
Features Support spread spectrum function for reducing EMI