STONECOLD6692 :
YES IT HAS PCI-E 2.0x16 SO IF I BUY ANOTHER 4GB RAM AND PSU OF 500W IT WOULD BE ENOUGH OR I WOULD NEED TO MODIFY MY SYSTEM
from what i found : the good : it can support 8GB , the bad PCI-E x16 slot is limited to 35W in some models (standard is 75W) hence GTX 970 might not run . You might need a new motherboard . i dind found the PSU .