Crysis on ati 4770 at 1440x900 huge performance loss

[demonnn]

i have oc'ed my 4770 to 1000/1020

on 1280x720 it get ~45 fps

when i set res to 1440x900 i get ~25

i can even play at 8x aa all very high @ 1280x720 with ~30 fps

why does fps drop that muchhhhh

 

[mister g]

How much VRAM does the card have? AA efficiency for the card is hugely dependent on VRAM, if it's too small than you'll take a huge performance impact, especially at 8x. Why don't you increase graphics quality instead of increasing AA?

 

[mactronix]

You have increased your resolution by 65%. that is the card is now filling a space 65% bigger than it was before. Its about right for that card. Dont know what your CPU is but i had a system with a 4770 and a 1440x900 screen and your numbers at that res and settings are very close to what i was getting. I used 4x AA and had some of the settings shadows for one turned down a bit.
you will just have to play with it and see where your sweet spot is.

Mactronix