We got a Acer pre-built computer a while back (few months) and it ran everything we needed it for just fine.... until we got a new monitor for it. It came with an AMD Radeon 7350, which blew away our other laptop we were using in terms of graphics (the laptop had Intel HD Graphics 3000). However, that was when we were running a 720p monitor. Now it is on a 1080p display and I'm looking to swap the GPU out. I have looked around and I've pretty much settled on the AMD Radeon 7750. First off, it will be compatible with the 300 W PSU (shouldn't be a problem. No power cables and the computer is not old at all).
What I'm wondering is if I will see a decent performance gain. The specs look better to me:
Its like comparing day and night bro.. and no you'd be okay with the 7750 but thats about it.. you cant go for any thing higher than that and you'd be pushing the PSU.. however you could also be able to make a gtx650 non ti work on it.. but that would be pushing it too.. to the max. So i recommend the HD7750.. remember DAY and NIGHT