gigabyte ga-b75m-d3h

I am using an older motherboard, a Gigabyte GA-B75M-D3H and in March I removed my Radeon HD 6970 and replaced with an MSI Ventus 3x Geforce RTX 3070 in order to see if I could mine ETH. After powering on the computer it did not allow me to go back into the BIOS by hitting the delete key on the...