I have come to believe this comes down to a driver issue let me explain
I have an ATi 6870 and I always update the drivers when ever possible. The current released official drivers for ATi cards (well I guess all of you young uns call it the AMD GPU now) is Catalyst 11.9. Through a site I know (
http://www.guru3d.com) I often get hold of preview and beta drivers and install them.
I am currently using 11.10 preview 1, now the site released AMD 11.10 preview 3 (I did not bother with preview 2 because the optimizations were for BF3 and Rage, neither of which I own or intend to purchase) and my game is running very smooth (apart from the normal bugs still within RO:HoS which affect most people) I have everything set to Ultra except for FX quality, set to high, foliage, set to high, and FXAA set to medium, bloom and frame rate smoothing set to OFF, post processing set to enhanced. On these settings I get from 50 - 70 FPS so the game is very smooth for me.
Anyway back on track, in the release notes from AMD for 11.10 preview 3 there was this line"Reduces stuttering seen on Dual CPU and Tri CPU core systems" now having a dual core e8400 this sounded like mana from heaven and so I installed it. It completely wreaked RO, I went from 50 - 70 FPS, down to 15 - 30 FPS, there was lots and lots of micro stuttering too (CPU bottle necking) and the sound went completely awful, lots of crackling broken sound, in fact I instantly had all the issues so many people have reported with RO:HoS. Fortunately I was able to roll back and everything is back to normal.
Now it seems to me if installing these drivers and I was getting these issues, that perhaps it is the drivers people have causing the issues. I know people will come back with I have this or that game and they run great so it must be the game, that would be my stock answer too, but after the above described incident, I am thinking it is driver issues, now in order to sort this out we need to know what equipment people are using and what drivers they are running to see if there is a common cause of conflict between some hardware configurations and certain drivers