There's no need to check, If you install the latest 4 in 1 drivers, weather there are existing drivers or not.
Your CM8330 soundcard will need drivers from your motherboard. These are Cmedia and came on a lot of generic motherboards, ECS, PCchips etc
Your Graphics card drivers are probable SIS630/730 and will be on the same site/M/B disk as the soundcard.
If you are still stuck, look at the boot screen to see the motherboard version. This number is usually on the bottom of the screen at boot, but isnt there for long.
You could also look inside at the M/B and see if there is anything printed on it. Post the details.
Intel Core2Duo 6400 @ 3.4Ghz
4GB Geil 6400 Ultra
3 x 500 Gb Samsung HD
EVGA 8800 Ultra OC