The iMac "Core i5" 2.9 21.5-Inch Aluminum (Late 2013/Haswell) features a 22 nm "Haswell" Quad Core 2.9 GHz Intel "Core i5" (4570S) processor with four independent processor cores on a single chip, a 6 MB shared level 3 cache, 8 GB of 1600 MHz DDR3 SDRAM (which is not intended to be upgraded after purchase), a 1 TB (5400 RPM) Fusion Drive, and a NVIDIA GeForce GT 750M graphics processor with 1 GB of dedicated GDDR5 memory. It also has a built-in "FaceTime HD" webcam and stereo speakers, but lacks an optical drive. This model has a 21.5" 1920x1080 LED-backlit 16:9 widescreen IPS display with the "cover glass fully laminated to the LCD and anti-reflective coating." The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges. Connectivity includes four USB 3.0 ports, dual Thunderbolt ports, Gigabit Ethernet, 802.11ac Wi-Fi (802.11a/b/g/n compatible), and Bluetooth 4.0. Compared to its predecessor, this model essentially has the same external enclosure, but it has a much more efficient "Fourth Generation" processor and architecture, as well as faster graphics, faster Wi-Fi, and the option of faster storage.
This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer.
2.9 GHz Quad-Core Intel Core i5 Processor (Turbo Boost up to 3.6 GHz) with 6MB L3 cache
1 TB (5400-rpm) Fusion Drive, 8 GB (Two 4 GB) of 1600MHz DDR3 Memory
21.5-inch (Diagonal) LED-backlit Display with IPS Technology; 1920-by-1080 Resolution
NVIDIA GeForce GT 750M Graphics Processor with 1 GB of GDDR5 Memory