ok.... my findings with MBA are the following and to be honest they are simple enough 🙂
"Don't place MBA on a bed, couch or your laps."
In other words don't place on any material that will even slightly bend under MBA's weight and either block it's ventilation grid or directly contact it's bottom. MBA has 4 very thin taps on it's bottom side, which are designed to lift it just a couple mms off any surface. This distance is crucial. As a rule of thumb MBA will shut down it's cpu cores or/and slow down GPU when ever it reaches a temp of 80+ celcius (use istat nano to monitor this). Playing an 720p video on your MBA with VLC player configured (a) "skip loop frames" set to "non ref" and (b) post processing set to "0" is perfectly possible (at least for 2.13 model that i own and have tested) even in full screen mode, also in windowed mode with safari running alongside but if MBA is contacting directly the surface below it, after a few minutes it will start to overheat.
Conclusively, if u plan to do heavy work such as watching HD video and also plan on using MBA on your bed or couch, either (a) place a slim flat & hard surface between MBa and bed ( this might be a large enough for MBA book with a hard cover) or (b) make up another way to lift it safely above bed or (c) buy a ventilated stand, which i think is the worst option as u will once again get overwhelmed by noisy and bulky gadgets.... Personally i find the (a) solution most convenient.
For my experiments i used an MBA 2.13 with SSD and a verbatim 500g ext. usb2.0 drive to store the HD video. I kept it plugged in for max performance. For playback i used VLC, with the aforementioned settings, which i found to be absolutely necessary for video to play in first place. As long as you manage to play back an HD video for 5 minutes, it is obvious you reached optimal performance tunning and any problems therafter are thermal problems caused by improper placing of your MBA or accumulated dirt which you can clean even off the fan by unscrewing the bottom side (how tos available in many sites) and using a computer air spray.
Message was edited by: qstorm-air