I tried to install a ddr3 into a ddr4 slot and tried to boot it

what happens if you put ddr4 in a ddr3 slot   Dan what is agp slot

In short, no Definitely not, unless you have a very odd motherboard DDr3 RAM is different from DDr4 RAM and isn't compatible with a DDr4

slot ddr4-2400 your machine they chose DDR3 and that's the only thing you can put If you bought DDR4 it wouldn't fit, it's different  Completely impossible Even if motherboard has both types of DIMM slots only one of them can be used at a time #2

gonzo''s quest slot machine gratis DDR5 can also run at higher clock frequencies than DDR4 But can you use DDR5 modules to upgrade a DDR4 or even a DDR3 motherboard? Users can fit more data on fewer chips, thanks to DDR4 RAM's capacity, which is up to four times more than that of DDR3 RAM Single memory