Depends on the resolution, I'm supposing 20" is 1680 x 1050. If so, it should be able to max out the majority of modern titles, however, there are several exceptions, the typical games such as Crysis Warhead, Metro 2033 (even an HD 5870 struggles to play Metro 2033 at 1680 x 1050) & Shattered Horizon - the main three I can think of.
Wow... You still can set max setting in Crysis Warhead in 22", even i am not try to my 20" yet people said that we can max only for 20" or below that size.
So 195.. Are you doing O.C to your HD 5770 or standard setting on your HD 5770..??????????
When i post thread for 5770 (can i play every game in max) almost everyone answer me with, maybe but in 1440-900. I buy MSI 5770 Hawk and now with only 2gb DDR3 i can play Crysis in 1680-1050 on enthusiastic mode...
I don't know yet for GTA 4, but STALKER, FAR CRY 2 and CRYSIS Warhead i play in 1680-1050 on max. I don't play in 1920-1080 becouse 1680-1050 is enought for me and go very well...
btw, no my GPU is nor overclocked, i run on stock speed (875Mhz core-1200Mhz mem)
For me 5770 is best "price-performanse" card...
I have a sapphire 5770 vapor-x and you can see in many games how many fps you will get. Also i have a Core 2 Duo CPU at 3.4 GHz and 2 Gb of RAM at 850 MHz.
Those results are real with no vendor influencing anything. All results ware based on min/max/avg fps recorded with fraps in a 2 min time frame in places where i thought the graphic chip will be stressed as much as it could.
Also there is little difference between graphic cards (5770) form different company's. The 5770 vapor-x stays cool and it is easy overclock-able.