Just out of curiosity have you changed your config for XIV? Turned things like Ambient Occlusion off, can you post some FPS results?
I'm moving house so my PC is all packed up so figured I'd try game on laptop, my Laptop is: i5 Quad 2.53ghz, 4GB Ram, ATI Mobility Radeon HD 4570. I run with the following specs: 720p, No AA, 6 GDQ, 1 BDQ, lowest Shadow detail (shows off ingame), Ambient/DoF/Cutscene all turned off, Hardware on, Texture boxes both Low. I cap top 30 FPS in towns and 40-50FPS when out doing leves on my own and no one is around. I also disabled sound device but i dont care much for sound on laptop but thats choice ofc, it wouldnt affect lag just load times (and by like 0.3 of a sec lol)
Hopefully my laptop spec and the settings will give you some idea, tho my laptop fans start going bonkers and sounds like an aircraft carrier lol.
When you pass Minimum you need to change the config to all Minimum settings, when it says Recommended the config will put you on "Recommended" specs, (or you can mess around yourself)
Looking here: http://www.videocardbenchmark.net/
My PC Card 5770 gets a 1646 score, yours gets 143 lol im surprised if it could play 3d chess XD
Download the XIV Benchmark and see your score, my laptop pushes out a lousey 500 score on LOW and is barely playable can be very laggy when casting magic and in camps. My Desktop pushes out 3500 on HIGH but I have to turn shadows off or it dips down to 30 FPS a lot.
