Technical Details

Operating system: Windows 7 Professional 64 (available through downgrade rights from Windows 8.1 Pro)
(This system is preinstalled with Windows 7 Professional software and also comes with a license and media for Windows 8 Pro software. You may only use one version of the Windows software at a time. Switching between versions will require you to uninstall one version and install the other version. You must back up all data (files, photos, etc.) before uninstalling and installing operating systems to avoid loss of your data.)
Processor family: Intel® Core™ i5 processor
Processor: Intel® Core™ i5-4590 with Intel HD Graphics 4600 (3.3 GHz, 6 MB cache, 4 cores)
Chipset: Intel® Q85 Express
Form factor: Microtower
Management features: Intel Standard Manageability (select models)
Environmental: Low halogen

Memory:

Memory, standard
4 GB 1600 MHz DDR3 SDRAM (1 x 4 GB)
Memory slots
4 DIMM