Originally posted by: NFS4
Better improvement to 7200, yes. But much increased heat and battery drain as well. I was thinking that the 5400 would be a nice in-between compromise...
Well, it sounds like you've already got it all figured out. :roll:
The reality is that 7200RPM drives really don't use any more power than 5400RPM drives (at least the Hitachi ones don't), and 5400RPM drives only use about 10% more than 4200RPM drives. Pretty much every modern 2.5" drive uses somewhere between 2.0W and 2.5W when in use.
Say you have a laptop that uses 15W average, running 5 hr 20 min on a 9-cell 80 WH battery. Upgrading from a 4200 to a 7200RPM drive could not reduce your battery life by more than 10 min. In reality, it wouldn't reduce it nearly that much because if the hard drive was in constant operation you wouldn't be getting 5 hr to begin with. Proportionally speaking, though, I don't think it would be possible for upgrading your hard drive to affect battery life more than 5%.
The Hitachi 7K60 7200RPM 60GB drive:
read/write = 2.5 W
active idle = 1.3 W
standby = 0.25 W
The Hitachi 5K80 5400RPM 80GB drive:
read/write = 2.5 W
active idle = 1.3 W
standby = 0.25 W
The Hitachi 4K80 4200RPM 80GB drive:
read/write = 2.0 W
active idle = 0.90 W
standby = 0.15 W
Toshiba MK8025GAS 5400RPM 80GB drive:
read/write = 2.5 W
idle = 1.05 W
standby = 0.25 W
Toshiba MK4025GAS 4200RPM 40GB drive:
read/write = 2.3 W
idle = 0.9 W
standby = 0.25 W