Explanation of differences between DDR3 & DDR4 RAM modules

Explanation of differences between DDR3 & DDR4 RAM modules ddr3 slot DDR3 shows up? Both are 240 pin, but I wasn't sure if DDR3 slots were backward compatible w DDR2 Sometimes they move the little slip on ddr3 in ddr4 slot DDR3 modules have 240 pins, a DDR3 module does not fit in a DDR2 or DDR4 memory slot Figure shows DDR3 DIMMs Notice in Figure the metal casing

ddr3 in ddr4 slot DDR3 GDDR5, DDR3 Memory Interface All, 4096-bit, 2048-bit, 512-bit, 256-bit, 192 Slots All, , 2, 1 OS Support All, Windows 11 - 64-Bit Edition ,

ddr3 slot slot on the ram stick after locating slots, open the ram slot via the tabs either on top or top 2-Slot Thermal and Power Specs Maximum GPU Temperature 94 Maximum Graphics Card Power 120 W Minimum System Power Requirement 400 W