AMD 880G is a chipset, not a motherboard model, I had looked it up before I replied, if CPU-Z sees just 880G too, well it's an imperfect app, so not completely
My motherboard does show up right in it.
So Acer likely used a bunch of generic motherboards, often times buy in 10,000 size chunks, and even different manufacturer's within the same sold as 'model'.
Just makes it harder for the user to deal with if trying to go outside their website's support/drivers.
Bottleneck wise:
Motherboard chipset and overall speeds affected, CPU speed/and possible lack of instruction sets available that would run some things
better, RAM speed, video card, internet/network speed and hard drives are your possible bottlenecks.
Watch this video on youtube for bottleneck info:
Understanding Hardware "Bottlenecks" and How to Avoid Them (NCIX Tech Tips #81) - YouTube
Like I said though, I promise your CPU is your bottleneck, you want a Phenom II class AMD at the least, an FX one would be nice if the motherboard is compatible, but Phenom II should improve your gaming drastically.
I just upgraded to a FX-8350 90 mins ago, the current top available AMD CPU available, to improve my own bottlenecking, that I knew would improve with this one, I just got a huge boost to multitasking and encoding when I do any of that, general gaming was not likely to be much different, but it's so new I haven't tested it yet.