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Compare Lenovo ThinkPad T420 vs. Lenovo ThinkPad X1 Carbon (6th Generation)

This is a side-by-side comparison of the specs of the ThinkPad T420 vs. the ThinkPad X1 Carbon (6th Generation). Differences are highlighted in yellow.
Item ThinkPad T420 ThinkPad X1 Carbon (6th Generation)
Item image Item image
Screen size 14" [x] 14" [x]
Maximum RAM 16GB [x] 16GB [x]
CPU i3-2310M [x] / i5-2410M [x] / i5-2450M [x] / i7-2620M [x] / i5-2520M [x] / i5-2540M [x] / i7-2640M [x] i5-7300U [x] / i5-8250U [x] / i5-8350U [x] / i7-8550U [x] / i7-8650U [x]
Release year 2011 [x] 2018 [x]
Screen brightness 250nt [x] (HD+ option) / 200nt [x] (HD option) 300nt [x] (300 nit matte option) / 500nt [x] (500 nit glossy option) / 300nt [x] (FHD IPS option)
Battery capacity 57Wh [x] / 94Wh [x] 57Wh [x]
Weight 2.11kg [x] from 1.13kg [x]
Power interface Coax barrel [x] USB-C [x]
Graphics Intel HD Graphics 3000 [x] Intel UHD Graphics 620 [x] / Intel HD Graphics 620 [x]
Resolution width 1366px [x] (HD option) / 1600px [x] (HD+ option) 2560px [x] (300 nit matte option) / 2560px [x] (500 nit glossy option) / 1920px [x] (FHD IPS option)
Resolution height 768px [x] (HD option) / 900px [x] (HD+ option) 1440px [x] (500 nit glossy option) / 1440px [x] (300 nit matte option) / 1080px [x] (FHD IPS option)
RAM interface Dual SODIMM slot [x] Soldered [x]
Screen type TN [x] IPS [x] (FHD IPS option) / IPS [x] (500 nit glossy option) / IPS [x] (300 nit matte option)
Colour Black [x] Black [x] / Silver [x]
Storage format 2.5" 7mm SATA [x] M.2 [x]
Key travel 2.5mm [x] 1.8mm [x]
PWM detected? Unknown [x] No [x]
Screen finish Matte [x] Matte [x] (300 nit matte option) / Glossy [x] (500 nit glossy option) / Matte [x] (FHD IPS option)
Width 34.05cm [x] 32.35cm [x]
Depth 23.3cm [x] 21.71cm [x]
RAM 8GB [x] / 16GB [x]
Height 3.05cm [x] 1.59cm [x]
Removable battery? Yes [x] No [x]
Fingerprint reader? Optional [x] Yes [x]
Trackpoint buttons Yes [x] Yes [x]
ThinkLight? Yes [x] No [x]
Backlit? No [x] Yes [x]
Supports Coreboot? Yes [x] No [x]
Card reader? SD [x] MicroSD [x]
CPU architecture Sandy Bridge [x] Kaby Lake R [x]
Function row style Physical keys [x] Physical keys [x]
NFC? No [x] Optional [x]
Multitouch screen? Optional [x] (FHD IPS option)
Keyboard style 7 row [x] Chiclet (Island keys) [x]
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