New
#71
MSI Europe – Computer, Laptop, Notebook, Desktop, Mainboard, Graphics and more
Go to the MSI site, enter in your board's details, and proceed to the correct download section for the latest bios.
I'm unaware if MSI has a utility to update the bios, but at least their live update does support your 32-bit version of Windows 7.
If they have a utility to update the bios, and I'm sure they must, use it. Please though, read the update instructions carefully, then re-read them again. Go through the process slowly. If you screw this up, you could render your board inoperable.
An updated bios *should* see your new cpu, and you should be able to boot up just fine after the update.