Very low FPS (pics of profile attached inside, along with details of what I've tried)

Hi, I bought NS2 today and tried it out. The FPS in the menu is fine (90+ I think) but it plummets once I'm inside the game (I've only been trying out Practice mode against bots).

I tried lowering all the graphics settings, turning Vsync off, trying out both options of multicore processing and of texture streaming, but even at a low resolution of 1280x720, my FPS is still ~13.

I searched around on Google and tried some of the suggestions offered on this forum. Started by typing the following commands in the console:

r_atmospherics false
r_bloom false
r_shadows false
r_instancing true
r_fog false
r_aa false

The FPS remained low. I also tried changing Nvidia control panel settings for NS2 (although my control panel seems slightly different than the image that's on these forums, so here, I'm attaching pictures that show what I changed my settings to):





Still no luck. I then followed the suggestion of writing (without quotes) "Start /high NS2.exe" in Notepad (or do I have to use the program "Notepath"? If that's what I need to use, can you please tell me how to use it?). Saved the notepad file as .bat and copied it in the NS2 folder. Used the .bat file to run NS2. FPS still remained low.

I've now gotten screenshots using the "profile" command in the console. Here they are:





So, any suggestions on what's causing my low FPS and what I can do now?