Geerling noticed this change after purchasing a new 8GB model Raspberry Pi 4 to replace the damaged motherboard, and found that a character in the model number on one of the chips had changed.this BCM2711 It is the SoC (System on Chip), the entire brain of the Raspberry Pi, including its CPU, GPU, and PCIe link to the USB port. Previously, its model number ended with B0T, but the model number of Geerling’s new baby ended with C0T, which is consistent with the model used in the Raspberry Pi 400 SoC.
It makes sense for the Raspberry Pi to do this because it reduces the number of different chips they have to order and process, and we may be able to expect new models to gradually penetrate the entire range-in fact, Geerling Provide some evidence This has already happened. However, the differences between the two models are somewhat subtle. In fact, it is very true. You might say, highly detailed.
Basically nothing. There are two major fixes related to RAM addressing, allowing PCIe and EMMC2 buses to access more memory than before (so the new chip appears on the Pi 4 with the most RAM) and some “power gating improvements.”
Compared with the 1.5GHz of Pi 4 Model B, the operating frequency of Pi 400 is 1.8GHz, so the openness of the new chip may be better Overclocking potential, Give enough cooling. Otherwise, unless you are dealing with content that requires 8GB RAM to be accessed through EMMC2, you are unlikely to notice any discrepancies.