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Just a general question: is one supposed to produce more heat than the other? I took my HP DC7100 SFF desktop, swapped the 80 GB SATA for a 250 GB IDE HDD and the IDE drive temperature sensor seems to be less than the previous SATA.

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up vote 1 down vote accepted

The generational differences in drive mechanics will predominate.

Anyway, the wattage should be printed on each drive.

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