HP Probook 4510 - 15.6" Led Backlit Widescreen Mobility with Optional 512 MB ATI discrete Graphics and Numeric Key board   Quick Specs HP Probook 4510 (Black) - Intel Core2 Duo P8700 2.53Ghz, 3MB / 15.6" Widescreen LED Backlit HD-Bright View / 2GB DDR3 upgradable up to 8 GB / 320GB HDD / DVD +/- RW / Wireless & Bluetooth / Ethernet 10/100/1000 / Touchpad / Chiclet keyboard / 2 MP Camera / 6 cell Li-Ion Batt / Windows 7 Professional / 1 Year Warranty / 2.2 Kg   HP Probook 4520   Quick Specs HP ProBook 4520s Notebook New Caviar ID Intel Core i3-370M Processor (2.4 GHz, 3 MB L3 cache) Mobile Intel HM57 Express Chipset Intel HD Graphics 15.6-inch diagonal LED-backlit HD Bright View (1366 x 768) Webcam Integrated 2 MP RAM 2 GB DDR3 FreeDOS 320 GB 7200 rpm SMART SATA II Hard Drive DVD+/-RW SuperMulti DL LightScribe Drive 6-cell Li-Ion battery Integrated Fingerprint reader Ethernet (10/100/1000 NIC) Wifi Bluetooth HP Standard 1 year warranty   Quick Specs HP ProBook 4520s Notebook New Caviar ID Intel Core i3-370M Processor (2.4 GHz, 3 MB L3 cache) Mobile Intel HM57 Express Chipset 512 MB dedicated video RAM 15.6-inch diagonal LED-backlit HD Bright View (1366 x 768) Webcam Integrated 2 MP RAM 3 GB DDR3 FreeDOS 500 GB 7200 rpm SMART SATA II Hard Drive DVD+/-RW SuperMulti DL LightScribe Drive 6-cell Li-Ion battery Integrated Fingerprint reader Ethernet (10/100/1000 NIC) WiFi Bluetooth HP Standard 1 year warranty   Quick Specs HP ProBook 4520s Notebook New Caviar ID Intel Core i5-450M Processor 2.4 GHz Mobile Intel HM57 Express Chipset Intel HD Graphics 15.6-inch diagonal LED-backlit HD Bright View (1366 x 768) Webcam Integrated 2 MP RAM 3 GB DDR3 Preloaded Win 7 Pro 500 GB 7200 rpm SMART SATA II Hard Drive DVD+/-RW SuperMulti DL LightScribe Drive 6-cell Li-Ion battery Integrated Fingerprint reader Ethernet (10/100/1000 NIC) WiFi Bluetooth HP Standard 1 year warranty     Download PDF   HP Probook 5310 - The World’s Thinnest Full-Performance Notebook Quick Specs HP Probook 5310 - Intel Core 2 Duo Processor SP9300 (2.26 GHz, 6 MB L2 cache, 1066 MHz FSB)/ 13.3-inch diagonal LED-backlit HD anti-glare (1366 × 768 resolution)/ WEBCAM Integrated 2.0 MP/ RAM 4G 1066DDR3 (single DIMM)/ 320 GB 7200 rpm 2.5-inch SMART SATA II Hard Drive/ Mobile Intel Graphics Media Accelerator 4500MHD/ Integrated wireless Intel 802.11a/b/g/n draft & Bluetooth v2.1/ Integrated Ethernet (10/100/1000 NIC)/ New sleek full sized keyboard design/ Touchpad with scroll zone/ 4-cell (41 WHr) high capacity Lithium-Ion/ Preloaded Windows 7 Professional/ 1 year HP Standard warranty/ Weight - Starting from 3.79 lb (1.72 kg)