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The MAINGEAR Ultima 18 is a desktop-replacement gaming laptop with an 18-inch 4K 240Hz G-Sync display, Intel Core Ultra 9 290HX Plus, and Nvidia RTX 5090 Mobile. It targets gamers and creators who want top-tier performance without a desktop. Compared to rivals like the Razer Blade 18 and Alienware m18, it offers a brighter 4K screen and similar high-end specs, but it is heavy and battery life is short. Reviewers praise its build and performance but note the high price and fan noise under load.
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Lowest price we've seen: $4,199.00 on Nov 11 at Maingear. Tracked across 2 stores since Nov 11.
Reviewers and owners praise the Ultima 18's blazing performance and stunning 4K display, but criticize its weight and fan noise. Battery life is a common complaint for a desktop replacement.
The Ultima 18 is an 18-inch laptop made for gaming and heavy creative work. Its 16:10 4K display (3840 x 2400) supports G-Sync, covers 100% of DCI-P3, and has a response time under 7ms and 400 nits of brightness. It runs on an Intel Core Ultra 9 290HX Plus processor with 24 cores that boost to 5.5 GHz, paired with an NVIDIA GeForce RTX 5090 Mobile graphics card with 24GB of GDDR7 and a 175W TGP.
A Boost button doubles the memory and storage. Memory goes from 32GB of DDR5 4800MT/s (2x16GB) to 64GB (2x32GB), and storage goes from 2TB to 4TB. The exterior and palm rest are metal. The keyboard is full-size with per-key RGB backlighting and 1.5mm key travel, and the large touchpad has a low-friction finish.
