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

Every DDR generation is different from the others DDR4 is not backward-compatible with DDR3 so a DDR4 DIMM will not fit on a DDR3 DIMM slot

Nope You can't You'll need to just buy DDR3 RAM, or upgrade the motherboard and CPU if you want DDR4 Last edited

what slot to put gpu in The quick answer is no; you will not be able to do if you manage to If you put a DDR3 in one computer and a DDR4 in another, the difference

what is the slot However, if you refer as “any slot” to DDR1, DDR2, DDR3, or DDR4, the answer is No This is because each type of DDR has a gap in a different