While it's good to see Apple adopting dual-core processors and PCI Express, a few of the new Power Mac's features are a little underwhelming. First, there's the move to DDR2, which is apparently limited to relatively pokey DDR2-533. The new Power Macs are also stuck with only two Serial ATA ports, with no support for 300MB/s transfer rates or RAID. Apple appears to have gone a little overboard with PCI Express, as well, outfitting the new Power Macs with x16, x8, and a pair of x4 slots at the expense of PCI and PCI-X. We're big fans of PCI Express, but given the dearth of PCI-E peripherals, it may be a little early to ditch PCI completely.