What price points or price ratios are available for SSDs and how does SSD cost compare to HDD cost?
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SSD pricing varies by the type of flash memory used. As of now, SLC flash ranges from $8 per gigabyte to as much as $40 per gigabyte, depending on the implementation. eMLC SSDs vary from $2 per gigabyte to $7 per gigabyte, while standard MLC SSD cost can vary from $1.33 per gigabyte to $3 per gigabyte.
By comparison, desktop-class 7200 rpm HDDs are available from $0.09 per gigabyte to $0.50 per gigabyte and enterprise-class 15K rpm HDDs are available from $0.83 per gigabyte to $4 per gigabyte. We are beginning to see the narrowing of the gap between certain classes of SSDs and HDDs, especially comparing eMLC SSDs and enterprise-class 15K rpm HDDs.
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