Posted 11 July 2012 - 01:23 PM
It's definately warm, but not overly hot I would think. Laptops usually run a bit hotter than desktops because they don't vent as well unless they are on a hard surface (and even then most run pretty hot). To give you a good comparison, the video card on my desktop machine, which has 4 huge cooling fans, runs about 60 degrees celcius during a stress test.
Its always harder to tell with laptops because the venting is so much different. Is the machine thinking a lot? What do you have the laptop sitting on? If the machine is sitting idle, 55 degrees celcius is pretty warm, but it may just be that model of laptop. My desktop machine sits around 35 or 40 degrees celcius when its idle, but I have a lot of cooling in that machine.
Try sitting the machien up on a book or something without blocking any of the vents so there is about 2 inches of room beneath it. See what it runs at when it's sat idle for 30 minutes or so.
You can look at getting a laptop cooling pad on Newegg or amazon. They put a bunch of fans under the laptop to help cool it. I have seen Acers run hot before, so it wouldn't surprise me if this machine just doesn't have very good cooling.