New notebook, worse performance?
For starters, I'd recommend getting your video driver directly from the AMD website. You'll probably want to use the 11.4 version, as that has typically been the most stable release for users of ATI graphics cards and CoH (though that's speaking from my experience with desktops, not laptops).
I don't know specifically how to force CoH to use the ATI card over your Intel card, though, as I've not had the privilege of working with a multi-graphics adapter laptop yet.
I don't know specifically how to force CoH to use the ATI card over your Intel card, though, as I've not had the privilege of working with a multi-graphics adapter laptop yet.

Main Hero: Chad Gulzow-Man (Victory) 50, 1396 Badges
Main Villain: Evil Gulzow-Man (Victory) 50, 1193 Badges
Mission Architect arcs: Doctor Brainstorm's An Experiment Gone Awry, Arc ID 2093
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Try disabling the intel graphics family adaptor in Device Management and see if the computer will tolerate that.
Oops, wrong thread.
After a couple weeks with NCsoft technical support, I finally discovered the cause.
It seems that Dell Vostro 3550 laptop has issues with *ALL* OpenGL-based software.
It seems they are working on a BIOS fix, but no ETA currently exists.
I recently upgraded my notebook (tbh I bought a new one) and strangely enough coh runs "slower" than on the old hardware...
On the current hardware I'm getting 18-20fps[1] with "recommended" settings, moving the slider to "ultra" fps drop to 5-6 while I remember that on the old notebook I could experience Ultra mode with decent framerate (20 or so). I was expecting the newer hardware would run the game better, not worse!
My current hardware is an AMD Radeon HD 6630M 1GB, on a i7@2.7GHz, 4GB@1333MHz and Windows 7 64 bit. I'm currently using the latest drivers from DELL.
The previous notebook had an nVidia Geforce 8600M/512M, was a core 2 due @2,1GHz, but I was using windows XP 32bit.
The curious thing is that Windows device manager shows two different video cards: the AMD radeon and an "intel graphics family". It seems like COH is using the intel graphics and not the radeon card... Strange because I know other games use the radeon pretty well: In lotro I got a bump to 60fps in very high settings, while on the old hardware I had 35fps in high settings.
[resolution is the same, obviously]
Any idea about what is happening here?
[1] In Mercy Island, just near the Arbiter, looking westwards at the roofs