One of my buddies is willing to sell one of his 640 Gb HDD for $40 but it's a 5400 RPM. Should I take that or should I just go with a lower storage HDD with 7200 RPM? Will there be any big difference I can see that will affect if I choose the 5400 or 7200 RPM?
This PC will mainly be used for light gaming, watching vids, and browsing stuff like that.
How much lower in size (GB)?
Personally I have 2 1.5TB Green drives and I use them specifically for viewing HiDef MKV files without hiccup. However I also do photo and video editing and for that I use the 7200 (WD Black) drives.