Power Mac G4 (Digital Audio): Differences Between Models

	M7627LL/A	M7688LL/A	M7945LL/A	M7681LL/A
Processor	466 MHz PowerPC G4	533 MHz PowerPC G4	667 MHz PowerPC G4	733 MHz PowerPC G4
On-chip cache	-	-	256K L2 at 667 MHz	256K L2 at 733 MHz
Backside cache	1 MB L2 at 233 MHz	1 MB L2 at 266 MHz	1 MB L3 at 167 MHz	1 MB L3 at 183 MHz
Memory (PC-133 SDRAM)	128 MB	128 MB	256 MB	256 MB
Hard disk drive	30 GB (5400 rpm)	40 GB (7200 rpm)	60 GB (7200 rpm)	60 GB (7200 rpm)
Graphics support	ATI RAGE 128 Pro 16 MB of SDRAM	NVIDIA GeForce2 MX 32 MB of SDRAM	NVIDIA GeForce2 MX 32 MB of SDRAM	NVIDIA GeForce2 MX 32 MB of SDRAM
Optical drive	CD-RW	CD-RW	CD-RW	DVD-R/CD-RW
FireWire	Two 400 Mbps ports	Two 400 Mbps ports	Two 400 Mbps ports	Two 400 Mbps ports
USB	Two ports (12 Mbps each)	Two ports (12 Mbps each)	Two ports (12 Mbps each)	Two ports (12 Mbps each)
PCI slots	Four slots	Four slots	Four slots	Four slots
Ethernet	10/100/1000BASE-T	10/100/1000BASE-T	10/100/1000BASE-T	10/100/1000BASE-T
Wireless networking	AirPort Ready	AirPort Ready	AirPort Ready	AirPort Ready
Modem	56K V.90	56K V.90	56K V.90	56K V.90

Note: Wireless internet access requires an internet service provider (fees may apply) and AirPort (or AirPort-compatible) wireless Ethernet card and base station. Some ISPs are not compatible with AirPort. For more information, see technical document 106590. "AirPort: Requirements for Wireless Internet Access".