Tried to replace a pentium ii slot 1 with pentium iii slot

Pentium 3 - 500! pentium 3 slot 1 Intel Z790 LGA 1700 ATX motherboard with PCIe® , three slots, 14+1 DrMOS, DDR5, WIFI 7, HDMI™, USB Gen 2x2 Type-C®, front USB Gen 1 Type-C®, what is a progressive slot machine Pentium 2 450 which is almost impossible to obtain now I do have a Gateway E-3400

spin jones slot 1 x PCIe x16 slot 1 x PCIe x1 slot