toddybody :
Hi Friend,
Im afraid you're going to have to use both the lowest graphics settings in addition to lowered resolution to play the titles above.
[http://www.anandtech.com/show/5541/amd-radeon-hd-7750-radeon-hd-7770-ghz-edition-review/17]
Have you bought the 7770 already? If so, the best thing would be to start testing!
actually, the results are a bit surprising. i only got bf3-4 and mgsV installed,, but they run really well!
bf3- on high setting, 1080p 60fps avg, ofc there are dips, but it is totally playable
bf4- same with bf3, but with auto setting(medium), totally playable
mgsV- 1080p, highish-medium settings, and most of the time 60 or 50+ fps, minimums are low 40s
this shows how well optimised mgsV is
i dont think i will run the witcher 3 well, 30fps on lowest settings as i saw, so R9 280x/380 here i come!