Only things I can think of are:
Low memory (need more memory on your motherboard)
old/to slow gfx card (might have to slow GPU or doesnt fully support everything, to little memory on it..or could also be an MX card)
bad direct X (reinstall)
bad gfx drivers (reinstall)
low cpu power (turn things off in the background or get new faster cpu)
Slow/full hd (might need to free some space for Virtual Memory OR defrag the hd where you got daoc)
Virus (well, who knows)
Daoc Client (try using SI/TOA in rvr or turn off Catacombs models..think you know this one already but thought I might mention it anyway)
Overheated (check all fans and make sure they run as they should, could need to invest in new more powerful ones. Remove the case of your pc to get more air into it incase you dont want to buy new fans and make sure it got some space and not just packed up with lots of stuff round it)
Zerg (make sure there are less albs on your screen..i.e quit daoc
![Wink ;)](./images/smilies/icon_wink.gif)
)
Its always a good idea to turn off as many gfx options as possible in the game, nice water effects and beutiful trees are nice but if they makes the game unplayable they will just have to go. Same with viewing distance ofc.
You can also try and update all other drivers on your pc and if you got AMD try updating your VIA drivers. If your not sure if your drivers are up to date check this site out
http://www.drivershq.com . It's a paysite if you wish to be able to download the drivers directly from it, but there is a free scan option which is quite useful as it tells you what you need to update.
Edit: I know You proberbly know all these things already but I thought I might aswell mention them anyway!
/Ankh