In each scenario we measure performance through
Full-on tuning: RAM upgrade to 8GB and installing a Samsung SSD 840 Pro, 256GB. HDD to SSD upgrade: the system with its original 2GB memory and a Samsung SSD 840 Pro, 256GB, replacing the original 250GB HDD. RAM upgrade: the system after upgrading the RAM to 8GB (keeping the 250GB HDD). Status quo: the existing system unchanged (HDD and 2GB of RAM). 
There are about 250,000 folders and 933,000 files on the drive. It is not needed if you are selling or giving away the computer.The technical specifications for the test system:
Download and install Mac OS X 10.6.8 Update Combo v1.1. The Setup Assistant will guide the new owner through the setup process after he/she turns on the computer. Instead, press Command and Q keys to shut down the computer. To leave the Mac in an OOTB (Out Of The Box) state, don't continue with the setup. If you are planning to sell or give your computer away, then do the following: After you reformat your hard drive and reinstall Snow Leopard, the computer restarts to a Welcome screen. Open Software Update and install the recommended updates. After you complete the Setup Assistant you will be running a fresh installation of Snow Leopard. When the installation has finished the computer will restart into the Setup Assistant. Continue with the OS X installation and follow the directions. After formatting has finished quit Disk Utility. Click on Options button and select GUID, click on OK, set the format type to MacOS Extended, Journaled. Set the number of partitions to (1) from the drop down menu. After Disk Utility loads select the out-dented disk entry from the side list (mfgr.'s ID and drive size.) Click on the Partition tab in the Disk Utility’s right window. When the menu bar appears select Disk Utility from the Utilities menu. After the installer loads select your language and click on the Continue button. Release the key when the Apple logo appears and wait for the loading to finish. Immediately upon hearing the chime hold down the C key. Insert Snow Leopard DVD into the optical drive and restart the computer.
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