1 inbuilt 12V pin from motherboard for fans
2. 12V input from the Power supply (there are 4 wire coming out from the 4pin connector 2 wires are (-) and 2 are (+) , one is a +5V, other one is a +12v, most probably +12V is the yellow or the orange wire )
3. 12V fan
4. LED bulbs
mamanam connect kale ohoma , oka lesi, wena widi athi bt danna. mama mother board fan connector 1kata fans 2k set kala parallel y , onanam 3k unath set karanna puluwan (refer ur MB manual for the max A out of those inbuilt fan connectors)