You do know many devices like Raspberry CM have FCC/IC modular pre-compliance, and thus usually only require LAB EMI testing under the rules.
The primary problem with mystery-parts is they tend to have issues with RoHS documentation, complex customs clearance requirements, and unknown specifications.
DIY evaluation kits people assemble do fall under a sort of gray area, but if your hardware does splatter the RF spectrum it is a $1m fine in the US, and a $5k fine + up to 5 years in jail in Canada.
Unshielded RAM, USB/PCI to Ethernet, and Video GPU chips will often just barely pass EMI testing under ideal circumstances. Cheap stuff from the mystery bins will usually just glean the FCC id off a refrigerator to get through customs.
The primary problem with mystery-parts is they tend to have issues with RoHS documentation, complex customs clearance requirements, and unknown specifications.
DIY evaluation kits people assemble do fall under a sort of gray area, but if your hardware does splatter the RF spectrum it is a $1m fine in the US, and a $5k fine + up to 5 years in jail in Canada.
Unshielded RAM, USB/PCI to Ethernet, and Video GPU chips will often just barely pass EMI testing under ideal circumstances. Cheap stuff from the mystery bins will usually just glean the FCC id off a refrigerator to get through customs.
Have a nice day, =3