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The Latitude E6420 is available in four preconfigured variants, and — as ever with Dell — you can tweak the configuration on the web site. Two of the preconfigured models feature a 2.7GHz Intel Core i7-2620M processor, the other two a 2.5GHz Core i5-2520M. You can opt for the quad-core Core i7-2720QM if you prefer; our review sample sported a rather more lowly Core i3-2310M running at 2.1GHz. The E6420 supports up to 8GB of RAM.
Our review sample ran Windows 7 Professional 32-bit, but you can specify the 64-bit version, or Windows 7 Ultimate (32-bit or 64-bit).
There are two graphics configurations available: Intel's CPU-integrated HD Graphics 3000 or the discrete Nvidia NVS 4200. Storage options include hard drives between 250GB and 500GB, and solid-state drvies up to 256GB.
Ethernet and Wi-Fi are included as standard, and the Latitude E6420 can be configured with Bluetooth 3.0, mobile broadband and GPS.
Further evidence of the E6420's 'business rugged' status is the presence of hinged rubber covers for many of the ports and connectors. This helps protect against the ingress of dust and liquids.
On the right edge, under a rubber cover at the back, there are two USB 2.0 ports and a USB 2.0/eSATA combo port. In front of these is the optical drive and, above it, a toggle for Wi-Fi. Right at the front is an ExpressCard slot.
There's a fourth USB 2.0 port on the left-hand side, behind a rubber cover at the back, along with a VGA connector and a headphone/microphone combo jack. Towards the front is a SmartCard reader.
The housing for the two rubber covers extends round the back corners of the chassis and onto the back edge. The left one provides a single-hinged cover for the Ethernet (RJ-45) port, next to which is an unprotected power jack. On the right the rubber housing provides a single hinged cover for a HDMI port and a cover that's marked as protecting a modem port, although there was no modem on our review unit.
The rubber protectors are screwed into place, and can be removed easily enough if you don't require them. When in situ they don't affect your ability to remove the battery. On the front edge of the chassis is a card reader for SD-compatible media.
Dell does not overburden the Latitude E6420 with software, but does include its own power management utility, which comes with several preconfigured power plans and the ability to build your own. It provides a visual representation of the effects the different power plans have on surface temperature, fan volume, CPU speed and battery life.
Performance
A Windows Experience Index (WEI) of 5.5 (out of 7.9) is probably on the low side for this notebook, given that the processor in our review unit is the slowest of those on offer and bettered by those in the preconfigured options. The indications are, then, that the Dell Latitude E6420 is a decent performer.
The WEI corresponds to the lowest component score, which was for Graphics (desktop performance for Windows Aero); the highest score, 7.6 went to RAM (Memory operations per second). In between was Primary hard disk (Disk data transfer rate) with 5.8, Gaming Graphics (3D business and gaming graphics performance) with6.2 and Processor (calculations per second) with 6.4.
Dell supplied our review sample of the Latitude E6420 with a 6-cell battery, although 4-cell and 9-cell options are also available; a second 3-cell battery can also be fitted in place of the optical drive.
We tested the battery as dell PC764 battery, dell TD175 battery, dell Precision M65 battery, dell DF230 battery, dell Latitude D531 battery, dell Latitude D820 battery, dell Latitude D830 battery, dell MM165 battery, dell YD626 battery, dell 312-0393 batterylife by playing a DVD video continuously from a full battery charge, choosing Dell's basic power plan that delivers an optimal balance between performance and power consumption. Under this plan the Latitude E6420 ran for a reasonable 4 hours and 22 minutes.
Conclusion
The Dell Latitude E6420 has rather ungainly looks, but these are underpinned by a solid chassis design. The screen and keyboard are both good, as is the battery life. With CPU options ranging fromCore i3 to quad-core Core i7, this is a highly configurable notebook. There are no integrated USB 3.0 ports, though — disappointingly, that's only available as a modular bay option.
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