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ddr4 in ddr3 slot   Dan ddr4 slot vs ddr5

No, you can't use DDR3 on a board that has DDR4 memory slots only They won't fit and won't work

HP Victus Gaming Laptop,12th Gen Intel Core i5-12450H,4GB RTX 3050 GPU,,FHD,IPS,16GB DDR4 DDR3 · DDR4 · DDR5 · LPDDR3 · LPDDR4 · LPDDR4X  AMD B550 ATX DDR4 Wi-Fi 6E Motherboard - Black Model: B550TMHWKWIFI SKU: 6504286 MSI - B550 TOMAHAWK MAX WIFI AMD B550 ATX DDR4 Wi-

crazy halloween slot HP Victus Gaming Laptop,12th Gen Intel Core i5-12450H,4GB RTX 3050 GPU,,FHD,IPS,16GB DDR4 DDR3 · DDR4 · DDR5 · LPDDR3 · LPDDR4 · LPDDR4X  How does DDR3 differ from DDR4 ram? ; DDR3 is somewhat slower than DDR4 in terms of speed DDR4 is the fastest and doesn't need any extra cooling requirements