Extend your forefinger and thumb as far as you can apart, see the distance between the tips? That's how much cooler(roughly) a 24" monitor is over a 20". Frankly you're getting a 25% increase in the amount of picture and the higher pixel count vs the 1600x900 is just well, one of the benefits of going to full 1080p. You can still run things at 1600x900 on those monitors, just they're able to bring out the big-time detail of standard 1080p content if you want to as well.
i see so a 24 inch monitor is taking full detail. ok, seems obnoxiously large but i may look into it.
@poster above, i tweaked the game and added a bunch of mods and get anywhere from 16-35fps, id like to try to increase that number, at least minimumwise. also im upgrading now to give hand me downs to my girlfriend for her rig. so im looking for biggest bang for my buck type deal.
from what ive gathered so far, the general consensus is. aftermarket cooler for my processor as i cant switch to a intel yet, stuck with amd.
get a radeon vid card as it favors skyrim more and can be cheaper.
possibly switch that 20 inch monitor to a 23/24 inch for full 1080p experience.
vid card wise...im looking at this atm. http://www.newegg.com/Product/Product.aspx?Item=14-150-517&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=4
again a little higher then projected, but i could later crossfire it.