Secondly NEVER EVER EVER EVER EVER EVER EVER partition a drive.
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WHY?
Everybody does it,to keep separate WINdows from GAMES.
Do you think I should let my raptor in ONE peace???
Rabidpeanut has a good point. There are very few justifications for partitioning drives. I would never say 'never partion a drive' (sounds like a James Bond movie title), but there are some myths doing the rounds regarding partitioning.
I should firstly admit that there was a time when I used to have 2 partitions on every drive
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Taking your case, you have a very nice raptor for the c:\ drive. It's partitioned so you have your OS (and program files I assume) on the outer edge of the disk. This is where you get the fastest read times. On the 2nd partition, (closer to the centre of the disk) you have your game installations.
Now, if in the future you need to reinstall your OS, you will also have to reinstall all your games, as virtually all games will right data to your c:\ drive (specifically the registry, and maybe other system files also). So, the data stored on this partition is not worth saving if a reinstall is required.
Secondly, when loading games, data will need to be read from both the 2nd partition (game files) and the 1st partition (system files). This means that the read heads of the hdd will need to keep jumping around between partitions to retrieve all the necessary data.
Essentially, you're more likely to notice a drop in performance compared to not having the drive partitioned.
If you had a 2nd raptor for the game files, then you would almost definitely notice an improvement in load times for games (2 separate drives reading system and game files simultaneously). If you were to use a standard SATA drive for the game files, then you may notice an improvement, but this would depend on the amount of game data needed to be retrieved (raptors being faster - with large amounts of game data, it may be faster to retrieve all the data from the raptor).
The only situation I can imagine needing to partition a drive would be if I had a relatively large drive for my OS and a shortage of storage space (and a shortage of cash to buy another drive). In this case, I would consider partitioning the OS drive to store data that I wanted to keep after a reinstall of the OS.