The ProBook 645 is the AMD counterpart of the ProBook 640 (Core i5-4200M, HD Graphics 4600) that we tested. While the models of the 640 product line are powered by Intel processors, AMD APUs are installed in the 645 devices. Our report will reveal whether the ProBook 645 is compelling.
We used the Lenovo ThinkPad L440 (Core i5-4330M, HD Graphics 4600) and Dell Latitude 3440 (Core i5-4200U, GeForce GT 740M) for classifying the laptop.
Since the ProBook 640 and ProBook 645 feature an identical build, we will not go in-depth about casing, connectivity, input devices, or speakers. The corresponding information can be found in the review of the ProBook 640.
HP installs a matte 14-inch screen with a native resolution of 1366×768 pixels in its ProBook. Unfortunately, HP provides a quite dark screen with an average brightness of 170.4 cd/m². The ThinkPad’s screen supplies a better rate (204.4 cd/m², HD). However, neither contender can match the very good result of the Latitude (319.7 cd/m², HD+).
The ProBook is quite suitable for outdoor use owing to its matte surface. However, excessively bright surroundings should be avoided because of the screen’s relatively low brightness.
The screen did not prove to be particularly viewing-angle stable. We would expect more from a 750 Euros (~$1039) laptop. The image soon distorts when the vertical viewing angle is altered. It looks better horizontally, and even several viewers can recognize the content when looking at the same time.
HP offers 14-inch sized business laptops in the ProBook 645 product line. Their computing power is absolutely sufficient for managing most tasks in the office, Internet, and communication field. They also feature classic business features, such as a docking port.
An A6-5350M APU does its job in the ProBook. It is based on Richland architecture. The APU’s CPU part is a dual-core processor that clocks with a base rate of 2.9 GHz. The speed can be boosted up to 3.5 GHz via Turbo. AMD specifies the APU’s TDP with 35 watts.
The CPU’s full performance is available in both AC and battery mode. The processor ran the single-thread tests of the Cinebench benchmarks with 3.5 GHz (both cores), and the multi-thread tests with 3.3 GHz (both cores). The ProBook cannot match the scores of either the Latitude or ThinkPad. Their Intel processors are significantly stronger.
AMD’s Radeon HD 8450G graphics core is used in the ProBook. The GPU supports DirectX 11 and has a base clock of 533 MHz. Its speed can be boosted to 720 MHz via Turbo. The graphics core’s power is on par with Intel’s HD Graphics 4400 GPU. Neither contender can compete with the Latitude. The GeForce graphics core is significantly stronger.
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