Just for information, I spent some 10 years as the network manager for a local authority before moving into information security last year. I do know what I'm talking about Al-Yeti. Your post was erroneous and misleading and would have led the poor guy to explore protocols he never needed to know a thing about. MrMAN's replies are good and cover the subject well - unfortunately I'm a busy man and don't have time to post extensive replies. More power to you MrMAN I'd suggest that Markybob checks out the SIS Sandra suite of PC diagnostics - it's pretty good and the modules that you get for free should suffice. However as Markybob points out, the system hangs could be down to a number of possible harware or software problems and before investing in new hardware I'd try a rebuild (remembering to back up data, favourites, etc.) starting with the operating system and media player of choice first, and then adding software until the problem crops up (unless of course, in the perverse way of IT systems a rebuild cures the whole thing....). If you want to check memory specs for any system or motherboards then I'd recommend Crucial Memory http://www.crucial.com - their online selector is excellent, and they are cheap as well (remember to select the UK site). I'f you end up looking for a replacement MB then you could do a lot worse than look at http://www.overclockers.co.uk - they do both Intel and AMD systems and are cheap and reliable. Good luck!