Hp 840 G1 Ssd Slot
NGFF Series 256GB SSD for Ultrabook/Intel Platform NGFF is an ideal Intel storage solution for ultrabook as it is smaller than mSATA. The NGFF physical dimension is 42mmx22mm, the thickness can be 2.75mm and 3.85mm. You can try to use this item to fit for your machine's different interface.
Hp Elitebook 840 G1 - Ssd M.2 Slot
Processor speed: The clock rate typically refers to the frequency at which a chip like a central processing unit (CPU), one core of a multi-core processor, is running and is used as an indicator of the processors speed. It is measured in clock cycles per second or its equivalent, the SI unit hertz (Hz). The clock rate of the first generation of computers was measured in hertz or kilohertz (kHz), but in the 21st century the speed of modern CPUs is commonly advertised in gigahertz (GHz). This metric is most useful when comparing processors within the same family, holding constant other features that may impact performance.