a PII with 128MB RAM??!!?? you gotta be freakin kidding, if you are going to run vista on a system with those specs you will need an awful lot of time on your hands when you use it. I don't think the final windows vista will run that low, right now there is not really a set minimum to run it because its still beta.
AMD Phenom II x6 1045T @ 2.7 Ghz
8GB Corsair Vengeance Ram
Crucial M500 240GB SSD (boot drive)
500GB WD 5000AAKX-001CA0
1.5 TB Seagate ST1500DM003
Zotac Geforce GTX 950 2GB GDDR5
Windows 10 Pro 64 bit