replacing X7900 to T9300 for macOS Sierra install Is it worth it?

replacing X7900 to T9300 for macOS Sierra install Is it worth it?

I’m wanting people to weigh in on installing macOS Sierra on 20" 2007 iMac. I installed a X7900 in it a few years back, but this CPU doesn't support SSE 4.1 instructions. The T9300 does and should work in this iMac. Same socket and same FSB 800. I’m also upgrading WiFi card to a BCM94360CAX combo card. Using an adapter and U.FL to MHF4 antenna adapters.