- No motherboard drivers for Windows 7 aside from generic drivers like Realtek.
- There are no chipset drivers for Windows 7 on AM4/TR4 platform
- No Windows updates for Windows 7. You get instantly blocked from Windows Update when it detects you are running a newer CPU.
- USB may not work as the chipset doesn't support USB 3. You may notice during the install your USB stops working and you are forced to used a USB keyboard or use USB driver injection trips/tools.
Ryzen/Threadripper setup sucks on Windows 7. It works but it can be a real headache to get it set up and running. Windows 10 would make your life easier.