Intel® Core™ i5-540M motherboard 598764-001 for HP Elitebook 2540p
HP ProBook 6450b 14.0" Silver Used Laptop - Intel Core i5 540M 1st Gen 2.53 GHz 6GB SODIMM DDR3 SATA 2.5" 120GB HDD DVD-RW Windows 10 Pro 64-Bit - Walmart.com
Intel CP80617004116AD - 2.53Ghz 2.5GT/s 3MB PGA988 Intel Core i5-540M Dual Core CPU Processor - CPU Medics