it doesnt make a difference because the graphic already on its limit. im pretty sure the CPU is slowing you down, as u see above, if u notice the higher my CPU % the higher my FPS is. for me i cant overclock since basically im using laptop and i have no intention in doing that as well.
just turn off some unused programs, disable antivirus temporarily and do disk-cleanup as well as disk defragmenter. sometimes it helps. if it's then u know it's your CPU limit.
add, another commandline for you to try-out.
If you are experiencing frame speed fluctuations, please update to the latest video drivers, then use the -memrestrict commandline. Please do not use any other commandlines as they may override the effects of this one. Start at the lowest number based on your texture setting (ie. try them one at a time) You can try to increase the number until you notice stuttering again.
-memrestrict 188743680 LOW TEXTURES (256M Video Cards)
-memrestrict 209715200
-memrestrict 230686720
-memrestrict 262144000 MED TEXTURES (512M Video Cards)
-memrestrict 293601280
-memrestrict 314572800
-memrestrict 629145600 HIGH TEXTURES (1Gig+ Video Cards)
-memrestrict 650117120
-memrestrict 681574400
If you still notice stuttering with the lowest number, there may be a seperate issue with your system configuration.
i suggest you to use this commandline= -fullspecaudio -memrestrict 293601280 -percentvidmem 100
or -minspecaudio, some computers works better with fullspecaudio, weird.