I have just finished doing such a migration after months of preparation and asking questions (which I'm sure annoyed some people here and elsewhere, yet I will make no apologies for it). However I have migrated from Windows XP x64 Edition to Vista Ultimate x64 Edition.
My hardware consists of an HP xw8200 Workstation with the following specs:
Two Xeon 3.68 GHZ CPUs
Two CSI Logic Ultra 320 SCSI Controllers each with a 73 GB 10,000 rpm disk attached
An nVidia GeForce 3200 PCI display adapter (my weak link bottleneck but it suits a workstation just fine, and that's what I had on hand)
7 GB ECC DDR2 400 Memory
Integrated audio, LAN and Sata (original) driving a DVD Burner
I found that initially there were some video issues (acceleration problems and artifacts), but I have sorted those out Keep in mind that I DID NOT have the video issues with a lesser PCI card that the system came with which is an nVidia GeForce MX 4000, when I performed a test installation of Vista last year. I no longer have that card though.
Overall, I have Vista running quite quickly. Now I've vLited out certain features like Indexing (I'd rather have those resources back and I don't mind the odd search taking longer), and I've turned off SuperFetch which I found contributed to slightly sluggish performance (but I do have conventional Prefetch running quite briskly).
I have to admit that I really miss XP x64 Edition. It ran sooooooooo well. I only migrated for extended phase supoort updates. Many here think I am making too much of that factor, but I don't think that running an unsupported Windows version for heavy Internet use and everyday work is too wise. So I moved along. And sooner or later, I won't be able to run an updated browser or security browser. In all, Vista is working well enough that I'll srtick with it.
Edited by JodyThornton, 03 March 2014 - 08:22 PM.