I know it is not easy. But with the high diff I want to try. I can solder, change the resistor but which one ? Thanks.
When you say new blade please be more specific in term of brand and model..
I'm guessing it's probably the ASICMiner Blade V2, which isn't overclockable by default like the old V1. The V2 needs electronic components changed to allow overclocking, where the old Blade just needed some voltage tweaking and a button on the management page pushed.