Use any provided times as an estimate - different materials melt at different temperatures.

Heat the GPU slowly.

GPU completion times: PS: 3-6 minutes, Xbox: 4-6 minutes, desktop boards: 12 minutes, laptop boards: 8 - 12 minutes, GFX: 8 - 15 minutes.

Be patient. If your oven has a window, check if the solder has melted visibly.

Set the timer on your oven for 5 -10 minutes.