why ?

i have question, why i have to use dx 8 instead of dx 9 (if i use dx9 the game doesnt even start) to play gmod.
my pc specs are:
acer extensa 5630Z… it’s a freaking laptop!!
2 gb ram
windows vista home premium
default shitty intel chipset 4500m
intel core 2 duo

i can play other valve games normaly without changin to dx 8 but why with gmod.

orange box does not like Intel chipset cards.

damn you Intel, damn you!!!

btw thanks