I don't think that my psu could be the problem, because i've tried my friend's LG DVD writer on my comp and it is working fine. No restarting, no problem in functioning.
But strangely when I connect my Moserbaer DVD Drive it starts restarting.
I've tried changing my SATA ports as well but no change ,still restarting.
My specs are :
Coolermaster PSU 450W , AMD Athlon X2 3800+, ASUS A8N-VM, 2GB DDR RAM, 7600GT.