|Here is a link to the Tyan site for that board. Nothing listed. I suggest you contact Tyan for an answer.|
I kind of doubt Windows 7 will run on that board. I couldn't even get the AMD site to recognize that chipset, let alone provide any drivers. Looks to me that all support for that board and chipset have been discontinued.
Additionally, I don't know why you would want to. the 462 socket is a 32 bit solution. Most any modern system will run faster than that rig. IMO the rig is obsolete. Would be OK to run as a second system with an older OS that you already have. You are going to spend 3 times the cost of the rig on the Windows 7 copy.