Is DDR4 RAM compatible in a DDR3 RAM slot?

does ddr3 fit in ddr4 slot   Dan does it matter what pcie slot i use

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slot Finally, DDR5 has 288 pins as DDR4 does but is keyed differently so that DDR3 DDR4 DDR5 FIGURE DDR4, DDR3, and DDR2 DIMMs FIGURE DDR3  PLEASE SUBSCRIBE!--- 3gwkYSk Buy DDR4 RAM-- 2VPHh1j

permata123 slot For most consumers the choice will be simple because DDR4 is not backward compatible If your motherboard was designed for DDR3, then that's what you can choose RAM generations are not interchangeable You can only use DDR3 with DDR3, DDR4 with DDR4, and so on Can I Use an 8 GB RAM Stick and a