One last thing. A very large HDD will show faster access than a smaller drive; other factors being equal.
In relation to Geeks statement on increasing performance by capacity ( higher data density drive ), I have also seen performance increased by splitting a larger drive say 1 TB drive into 80GB primary & 920GB secondary partition, because while you have the higher data density of the 1TB drive platters, allocating 2 partitions to be isolated from each other forces the data to be read from a "shorter sweep of the read head". The performance gain is not like having a SSD, but those who want to optimize a HDD I have seen split large drives into multiple partitions to get a noticable performance gain. The smaller the first partition though the better the performance gain for data accessed in that first partition, although there is a limit to how much gain you will get. But still, this is no wheres near as fast as a SSD, its just a speed drive optimization trick to force say the OS and swap to be within say the first 80GB and the rest of the drive to work in the slower larger sweep portion of the drive.
I went through all the trouble to maximize HDD performance in the past before SSD's where available. I even ran 2 hard drives in gaming systems and had my swap / paging area on a seperate drive to that of the drive that the game and OS was running on to increase performance. But these days I go for very affordable SSD's and dont bother with HDD optimization for the small gain.
More info here:
http://www.pcworld.com/article/255224/how_to_partition_your_hard_drive_to_optimize_performance.htmlLastly one neat trick if you have lots of RAM in your system is to create a RAM Disk. This allocates a portion of otherwise idle memory to act like a "Temporary" hard drive space. And you can upload from a HDD or SSD to this RAM Disk data that will be read and/or written to repeatedly and every time that the system accesses the RAM Disk, the data is lightning fast from RAM direct to CPU. There are pros and cons to this RAM Disk. With the primary Pro being the ultra fast speed of loading large files more than once or reading and writing multiple times which otherwise would batter a SSD or HDD. The Cons for this usually outweigh the Pros to many people. The primary con is that data in RAM is unprotected from loss in *home computers. So if you have a power outage or a computer crash the data in RAM is gone. * In costly higher end servers that most people do not have, the RAM has a battery that allows for the system to pick up where it left off with the RAM holding all the data through a power outage called NVDIMM's
http://en.wikipedia.org/wiki/NVDIMMI have used the 4GB Freeware RamDisk Lite version listed at the bottom of the page at this site linked below, and it works VERY WELL for lightning fast read/writes. 4GB is pretty small for those who want to run most games that would benefit from the performance gain, however I had a script that worked with a non-commercial personal use MySQL database and while this script use to take about 5 minutes to update tables with updated info on a 500GB SATA II HDD 7200rpm, using the RAM Disk with DDR2-800Mhz made this a 38 second routine vs watching the HDD LED on solid for 5 minutes and battering the read/writes of a SSD or HDD. So the data is written to this RAM Disk at boot and then the RAM Disk gets a 1.5GB allocation from 4GB of physical RAM leaving 2.5GB for the Windows 7 64-bit system, setting up the drive letter as Z: for this space, and when the process is complete it writes the end result back to the C: drive so that the data is not lost on shutdown.
If someone had say 16GB of physical RAM, and allocated say 12GB of the space, leaving 4GB for the OS and game, then for a game install to replicate to this 12GB RAM Disk, and then launch the game from that RAM Disk at say the Z: drive, that game for any read/writes it required would be lightning fast. So large games that have large files that constantly load the game content as you move around in the game for textures, map info, etc would all be as fast as a snap of your finger when paired up with a good CPU system that maximizes gaming performance. However there is always the initial load from SSD or HDD to RAM Disk and then if you want to save any data from the game that is local data, you would have to write those changes back to the SSD or HDD in the end before shutdown.
http://memory.dataram.com/products-and-services/software/ramdisk[recovering disk space, attachment deleted by admin]