HP Engage Flex Pro Retail System Small Form Factor, Intel® Core™ i5, i5-8500, Intel, 4.1 GHz, 3 GHz, 9 MB HP Engage Flex Pro Retail System Small Form Factor. Processor family: Intel® Core™ i5, Processor model: i5-8500, Processor manufacturer: Intel. Internal memory: 8 GB, Internal memory type: DDR4-SDRAM, Memory clock speed: 2666 MHz. HDD speed: 7200 RPM