DCS engine is several years old already, BF3 has much less visibility distance and models details, ROF is DX9 only... This makes CloD one of most demanding games. The patch will improve performance though.
I hope you have more than 1GB of VRAM and run Win7-64.
"The NVIDIA GeForce GT 555M is a fast
middle class graphics card for laptops."
http://www.notebookcheck.net/NVIDIA-...M.41933.0.html
You definitely need more than a middle class card for a high-end game. I used to buy notebooks but got rid of them for a desktop system that is much more easily upgradable every 1-2 years.
Try playing on external CRT monitor if you have one. They allow playing at lower resolution at the same monitor size without quality loss.