Yep, at my old job we still had to support Windows XP 32 bit for the game client (internal tools were Windows 7 64 bit) as so many people were still playing on

Yep, at my old job we still had to support Windows XP 32 bit for the game client (internal tools were Windows 7 64 bit) as so many people were still playing on systems. I don't remember if we could use SSE2 or what the minimum was in that regard.