What price points or price ratios are available for SSDs and how does SSD cost compare to HDD cost?
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.
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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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