2017 Apple iMac 21.5” 4K, Core i5-7400 3.0Ghz, 16GB Ram, 1TB HD, Sierra, Grade A-
2017 Apple iMac 21.5” 4K, Core i5-7400 3.0Ghz, 16GB Ram, 1TB HD, Big Sur, Grade A-, 1 Year Warranty. - Original Apple Keyboard NOT Included, choice of Black Logitech Wireless or White Microsoft Wired
The iMac "Core i5" 3.0 21.5-Inch Aluminum (Retina 4K, Mid-2017/Kaby Lake) features a 14-nm "Kaby Lake" 3.0 GHz Intel "Core i5" processor (7400) with four independent processors "cores" on a single chip, a 6 MB shared level 3 cache, 8 GB of 2400 MHz DDR4 SDRAM that is reportedly onboard -- but actually can be upgraded later -- a 1 TB (5400 RPM) hard drive, and a Radeon Pro 555 graphics processor with 2 GB of dedicated VRAM. It also has a built-in "FaceTime HD" webcam and stereo speakers.
This model has a 21.5" 4096x2304 LED-backlit 16:9 widescreen IPS DCI-P3 "Retina 4K" display (that runs "pixel doubled" to look like 2048x1152). The rear of the case is aluminium 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 3 (USB-C) ports, Gigabit Ethernet, 802.11ac Wi-Fi, and Bluetooth 4.2.
Compared to its predecessor, this model essentially has the same external enclosure, but it has a more advanced processor and architecture as well as dedicated graphics, a brighter display, and Thunderbolt 3 (USB-C) ports.
By default, the "Mid-2017" iMac models shipped with a compact aluminium Apple Magic Keyboard and the multi-touch "Magic Mouse 2". For an additional US$30, you could upgrade from the default keyboard to the "Magic Keyboard with Numeric Keypad" and for an additional US$50, you also could upgrade from the Magic Mouse 2 to the "Magic Trackpad 2," which provides multi-touch and pressure-sensitive "Force Touch" capabilities.
Details: This model is powered by a 14 nm, 64-bit "Seventh Generation" Intel Mobile Core i5 "Kaby Lake" (I5-7400) processor which includes four independent processors "cores" on a single silicon chip. Each core has a dedicated 256k level 2 cache, shares 6 MB of level 3 cache, and has an integrated memory controller (dual channel).
This system also supports "Turbo Boost 2.0" -- which "automatically increases the speed of the active cores" to improve performance when needed (up to 3.5 GHz for this model).
Grade A: "New" or "Pristine as new"
Grade A-: Pristine screen, but may have 1 or 2 small cosmetic marks on the outer case Grade B+ = Hairline marks on the screen, so visible when not in use, shouldn't be visible in use.
Grade B: There is be visible marks on the screen and also when in use.
Grade B-: Same as above but will be more prominent.
Grade C: May have severe cosmetic marks/damage but full functioning
99% of our grade A stock will be Grade A-. We usually grade lower than needed so we are covered and the customer has the correct expectation of the grading.