According to the only SZ6xx review out right now, that would be incorrect:
From:
http://www.mobiletechreview.com/notebooks/Sony-Vaio-SZ650.htm
Perhaps the most exciting thing about the Sony Vaio SZ650 is its Intel Santa Rosa chipset. Notebook geeks on the Windows and Mac front have waited expectantly for this evolution of the Centrino line and it's also known as Centrino Pro (corporate marketing name) and Centrino Duo (consumer marketing name). Why? The Intel GM965 Express Chipset is faster thanks to its 800MHz FSB (the last generation Napa chipset ran at 667MHz).
It allows for 4 gigs max RAM (the old limit was generally 2), adds support for 802.11n at its final draft stages with the integrated Intel 4965AGN, supports Intel Turbo Memory (aka Robson) and ReadyDrive in Vista for use with the hybrid hard drive, better claimed battery life, and it uses a new integrated graphics controller-- the Intel X3100 which shows huge improvements over last generation's Intel GMA950. There's only one difference between Centrino Pro and Centrino Duo, and that's the Intel 82566 gigabit Ethernet chip. Though Sony doesn't tout the Pro label, the SZ6 series has Intel's gigabit Ethernet (which puts it one-up on the 13" Dell XPS 1330 notebook that it competes with).
To take full advantage of the 800MHz front side bus, the laptop should have 800MHz PC-6400 DDR2 RAM. However, that RAM is still a bit hard to come by (in fact when Intel finalized Santa Rosa it didn't yet exist), so the Sony has 2 gigs of DDR2 PC-5300 677MHz RAM.
There are 2 standard SODIMM slots under a memory door on the bottom of the computer and the machine can address a maximum of 4 gigs of RAM (Windows Vista 32 bit can't see more than 4 gigs of RAM, only the 64 bit version of the OS can). The SZ650N/C has a 2.2GHz Intel T7500 Core 2 Duo processor, and the SZ670 and SZ691 have a 2.4GHz Intel T7700 Core 2 Duo CPU.
Problems? See this thread at archive.org.
