Used brother MFC-L3770CDW with a firmware T or older. If you can’t get one with an old firmware you have to use brother replacement toner. It’s sometimes possible to downgrade firmware but having had to do it once I never want to again.
But other than the toner issue it works fantastic on Linux and my whole house uses it.
Would not recommend for photo printing.
I think my favorite overclock was back in the early Conroe days when Intel first released the core m processor. I bought an Asus white book and after assembling everything and doing on a power-on test I immediately powered it off and did a pin modification to force the socket from 100 megahertz front side bus to 133 megahertz front side bus.
It was such a simple modification that netted me significant performance improvements and voided my warranty in the first 5 minutes.