just want to share with you guys.. last nite just upgrade my stock hdd from 320gb 5400rpm to 500gb 7200rpm.. running parallel desktop, i found that the apps response a bit faster than the previous one.. was about to buy momentus XT (hybrid) but found a freeze issue on mac from the forum.. ssd too pricey.. wait till the price drop..

eh, suddenly i realized the vibration.. i think wiraone spot on.. actually i bought the hdd together with speck satin case.. after upgrade, straight away put on the casing.. i thought it was the casing. just now i strip away the casing and tested.. yup.. u could feel the vibe a bit.. abit la.. not much..

ya laa.. make sense also.. it should be expected. more rpm, more heat and more vibe feel.. im still looking at the battery consumption, no diff so far.. still can get more than 5 hours on a single charge + using ethernet..