Dasanko

  WAT

Skyrim devouring 4 GB of RAM (memory module, not memory card, completely different things) when a bunch of mods (depending on what kind of mods, but I guess you've been 'retexturing', 'improving lighting', etc) have been added to it, is fairly normal.   As far as upgrading your RAM goes, that'll depend on your laptop. There is a maximum supported limit for it, and it should be specified in the manual. However, do you *really* need the RAM? Are you certain it is being completely used up to the point of paging kicking in? You could see about shutting down as many background applications as possible before delving into your modded Skyrim.

  A forced shutdown denotes a terrible hardware overheat. When a certain safety temperature is reached, all hardware is shutdown to prevent grave damage (melting, burning, etc).   For a laptop, you should clean the CPU fan's heatsink every few months, they tend to build up a "dust wall" there that effectively forces the CPU fan to spin faster and faster until it just can't keep up. You may want to renew the thermal paste, while you're at it.   Finally, there's also the possibility that either your CPU or GPU are dying.   Note that laptops cannot handle so much stress for so many hours like desktop computers can (worse cooling, airflow). Restrain yourself a bit when it comes to intensive games.

  There are always 1000 bytes in a KB, precisely because KB stands for KiloByte.   Many OSes will report the size using KiB (KibiBytes) instead, which does contain 1024 bytes per unit.   The greatest source of confusion here would be Microsoft's fault, as they have Windows report storage size in KiB/MiB/GiB/TiB, but display KB/MB/GB/TB as the storage units used.   Storage manufacturers always advertise their products in GB/TB (arguably a marketing trick), so you do always get precisely what you pay for.   As for the OP, could have tried cleaning out %TMP%.   EDIT: Finally, the only actual recommendation for CCleaner is to burn both the computers that have it installed, and their users.

The 750 GTX TI is the superior card of the two.   It's not that it's gaining the same amount of power; it's much more power-efficient, meaning it requires less power (newer architecture). As a plus, while being noticeably graphically superior and consuming less power, it's also cooler.