This is likely off topic, but I hope I can get an answer regardless. Can some disk experts tell me the heat impact of changing the existing 4200rpm drive to slightly larger 5400rpm. I know the battery life will be cut when mobile. I don't care on this one that much. I do care about heat when it does a defrag or chkdsk or Acronis imaging. My laptop is valuable to me because of various ports current new computers don't have, so the most important thing is not to fry it.