Tried several UIs, all give me major lag-spikes

[Fmx2G]

As said in the title I get a lot of lag when I log on, even though I put my settings to low. Now I know a bit about computers and my computer normally run WoW on Ultra with not a single sign of lag and can easily go a lot further without any problems. So now I've tried two UIs and both of them are either new/updated and both of them make me lag as s*** D: I don't know what caused the problem. I've tried to remove 1 addon at a time, yet again I don't get a result /: Pleaze help meeeeh

Many thanks

Fmx2G