HP recommends running the ProBook 640 G2 on Windows 10 Pro operating system, but you can downgrade to Windows 7.
The notebook comes with the usual ports and slots for similar offerings, including USB 3.0 ports and a USB Type-C port. Wi-Fi 802.11ac, Bluetooth 4.2, LTE modem and optional NFC are available for wireless connectivity, depending on model.
According to its maker, the HP ProBook 640 G2 is for “executive-class” collaboration. It features HP Noise Cancellation Software, optional Skype for Business and an HD webcam. Dual integrated stereo speakers and HD Audio with DTS Studio Sound hold promise of respectable sound.
utfitted with a 2.4-GHz Intel 520M processor, 4GB of RAM, and a 7,200-rpm, 500GB hard drive, the 8440p fared well on our tests. Its score of 5,552 on PCMark Vantage was about 1,500 points above the category average.
While it's no SSD, the 7,200-rpm hard drive booted into Windows 7 Professional (32-bit) in a speedy 44 seconds. That's about 15 seconds below average, and 1 second better than the T410. Its file transfer speed of 29.6 MBps was also comfortably above average (23.5 MBps)
HP EliteBook 820 G3 is a Windows 10 Pro laptop with a 12.50-inch display that has a resolution of 1366x768 pixels. it comes with 8GB of RAM. The HP EliteBook 820 G3 packs 256GB of SSD storage.Graphics are powered by Intel Integrated HD Graphics. Connectivity options include Wi-Fi 802.11 b/g/n, Bluetooth and it comes with 2 USB ports (2 x USB 3.0), Multi Card Slot, Lock Slot, VGA Port, Mic In, RJ45 (LAN) ports.