can i use ddr3 in ddr4 slot is it safe to buy

can i use ddr3 in ddr4 slot is it safe to buy Product Description：

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Product parameters：283697

Available Colors：#348560

Available Sizes：541 * 181 * 535

Indicated for：bitcoin rush recension

Model Reference：can i use ddr3 in ddr4 slot is it safe to buy

country of origin：USA

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