Hi, I have two drives iHAS124 and iHAS324

How many dvds can i ripp at the same time without effecting the ripping max speed.

my specs:

CPU:- AMD Phenom(tm) II X6 1055T Processor 2804.1 MHz
Video:- NVIDIA GeForce GTS 450
DVD-RW DRIVES:- D: ATAPI iHAS324 B | E: ATAPI iHAS124 B
RAM:- 4GB DDRIII

whats most critical to dvd ripping, cpu, ram, hdd, ROM etc.