Is The DDR3 Graphics Card Compatible With DDR4 Motherboard?

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

You can select your preferred language independent from your country English DDR3 DDR4 DDR5 Speed * Speed * 1600MTs 1866MTs

does ddr5 fit in ddr4 slot You cannot use DDR5 RAM into DDR4 motherboard socket Since DDR4 and DDR5 memory

does it matter which pcie x16 slot i use More tutorials: Let us present a how-to guide for DDR3 memory