In my search for a suitable mobo for the i7-10700K CPU I bought on Amazon yesterday, I often came across mobos that have a letter after the Z490 chipset designation. I've seen Z490-F, Z490-A, Z490-V, Z490-H, Z490-P, and Z490-I. I think Z490-I stands for an ITX board, but I don't know the meaning of the others. What do those letters stand for, and are they hugely different? PCPartPicker.com doesn't show these letters in their listing of LGA 1200 boards. Thanks.