Tech From Alex

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189 reviews & guides.

Compact USB-C wall charger and cable on a desk
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PPS

PPS is the USB-PD 3.0 trick that lets a phone ask for voltage in 20 mV steps, which is what Samsung Super Fast Charging and similar phone profiles actually use.

Closed laptop side showing two USB-C Thunderbolt ports next to MagSafe
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Thunderbolt

Intel's certified USB-C path: a controller plus a protocol, which is why a USB-C dock is not Thunderbolt.

White USB wall charger and cable on a wooden desk
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GaN

Gallium nitride is the semiconductor that lets a USB-C charger pack laptop watts into a pocket cube instead of a silicon brick.

Desk with a laptop and two external monitors
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DisplayLink

A software-plus-chip path that turns USB into extra monitors, the usual fix when a Mac will not drive two independent displays from a plain USB-C dock.

USB-C charging cable on a desk
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USB-PD

USB Power Delivery is the handshake that lets a USB-C cable carry laptop-class wattage, if the brick, cable, and device all agree.

Internal hard disk drive platters and actuator
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SMR

Shingled magnetic recording packs more data onto a platter by overlapping tracks, then slows to a crawl once the cache fills.

Open computer case with internal storage drives
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CMR

Conventional magnetic recording gives every data track its own lane, which is why NAS and RAID buyers treat CMR as the safe default.