In Shenzhen Grande 's opinion, whether old CPUs were soldered to the motherboard or not which mainly depends on the slot of CPU. After all, all CPUs have their own characteristics. Exactly speaking, so long as the CPUs have slots, then it can be concluded that the CPUs must insert the slot directly; On the contrary, the CPUs will be soldered to the motherboard instead;

Apart from that, for those CPUs model followed with “HQ” and all-in-one machines, which must be the BGA package. That is to say, the CPUs are also soldered to the motherboard.