Rx480 bios mod

[crypto_alpha]

Hi

I tried to Mod my Asus rx480 with this guide (https://steemit.com/ethereum/@yogibear/mine-more-ethereum-with-rx470-rx480-bios-mods).
After rebooting ATI driver couldn't find the card and claymore kept crashing then chickened out and restored the original bios.

Did i just voided my warranty or destroyed my card?

It's working fine now and i am getting 24-25 MH/s

PS: my memory is Samsung