MSI’s Stealth 18 HX is a powerhouse—and its 280 W power adapter runs just as hard. Under a demanding game like Cyberpunk 2077, the compact brick can climb to nearly 70°C, making it one of the hottest gaming laptop chargers we’ve seen. For context, many high-performance adapters top out much cooler: Lenovo’s Legion 7 16 power supply was measured around 48°C and the Alienware 16X about 46°C. Even the 330 W adapter for the Razer Blade 18 lands near 47°C under similar conditions.
Why this power brick gets so hot comes down to design and load. The adapter is notably portable at roughly 16.5 x 7.5 x 2.5 cm, packing a lot of wattage into a small footprint. Pair that with the Stealth 18 HX routinely pulling over 270 W while gaming, and you have a 280 W unit operating close to its limit for extended stretches. That sustained, near-maximum output naturally raises surface temperatures—over 20°C higher than what’s typical for many gaming adapters.
High surface temps aren’t inherently dangerous, but they do call for extra care. At around 70°C, the adapter can feel uncomfortably hot to the touch and may heat up anything pressed against it, including other cables and plastic housings.
Practical tips to stay safe and keep temperatures in check:
– Place the adapter on a hard, flat surface with good airflow; avoid carpets, beds, or couches.
– Don’t cover the brick or tuck it behind furniture where heat can build up.
– Keep other cables and objects away; avoid creating a tangled cluster around the adapter.
– Give it a few minutes to cool before packing it into a bag.
– Coil cables loosely to reduce stress and heat buildup at the connector ends.
– Use only manufacturer-approved adapters and cables; third-party units can be risky.
– If your room runs hot, expect higher adapter temperatures and plan extra ventilation.
Bottom line: the Stealth 18 HX can draw so much power during gaming that its compact 280 W adapter runs near the edge, explaining those unusually high surface temps. Treat the brick like a mini space heater—give it breathing room, keep clutter away, and handle with care after long sessions.
