How much will a new hard drive boost my performance. The specs of my rig are in my signature. Along with that rig I have a 120GB, 5400rpm, 2MB cache, Western Digital WD1200AB. It seems pretty fast, but in all benchmarks it seems to be the one bottleneck beside my ram, which is about to be replaced. The hard drive is not SATA, it's like EIDE or something like that. It's slow, and has a low cache, but it seems fine. Would replacing this hard drive with a SATA 3.0GB/s 7200 16MB cache beast make much of a difference in, file moves, copying files from external devices, gaming, music management?