Hi Gege, no sorry, you can not use this one on the 4G 480 cards. The 4G cards have hynix VRam (and now elpida VRam), where the 8G cards have Samsung VRam. The samsung is better ram - capable of tighter timings.

Your 480 card is like the 470 card when it comes to its ram, can you use GPUZ and tell me which kind of ram you have? Hynix or Elpida? (you probably have Hynix, but Elpida 4G 480s have started to surface in the market)

For the Hynix VRam 480 4G, you should get similar results if you copy up the 1500 timings as I show how to do in the DIY 470 4g Bios Modifcation video. You can try to copy those timings up and flash and check the hashrate result for ETH/ETC. Please let me know your results if you try. Thank you