How to interpret the Processor specs shown on the System screen of a computer, for example 'Intel Core i7-4600u 2.1 GHz x 4'? In particular, how is i7-4600u compared to other variations -
Dell Latitude E5540 15.6" Intel Core i7-4600U 2.10GHz 8GB 240GB Windows 10 Pro | eBay
NeweggBusiness - Lenovo Intel Core i7 4600U (2.10GHz) 8GB DDR3 SDRAM Memory 128 GB SSD Intel HD Graphics 4400 14.1" 1366 x 768 Ultrabook Windows 10 Professional (64-Bit) T440S
HP Laptop 840 G1 Intel Core i7-4600u 2.10GHz 8GB DDR3 Ram 1TB Hard Drive Win 10 Home (Renewed)
Dell Latitude E7440 Intel i7-4600U 2.10GHz 8GB Wi-Fi 250GB Webcam Bluetooth | eBay
HP ELITEBOOK FOLIO 9480M 14" CORE i7-4600U @CPU 2.10GHz 2.7 GHZ 8GB RAM 500GB HD | #1792353668
HP EliteBook Folio 9480m Ultrabook Intel Core i7-4600U 2.1 GHz 14" Windows 7 Professional 64-Bit (available through downgrade rights from Windows 10 Pro 64-Bit) P3E04UT#ABA - Newegg.com