In Lenovo's laptop world, Legion is the gaming brand — equipment designed for gaming: powerful processors and graphics cards, efficient cooling, and high-refresh displays. But before Legion arrived, gaming Lenovo machines lived under the IdeaPad Y banner. Here's how that family was born and evolved.

The Beginning: CES 2017 - Legion Y520 and Y720

The Legion brand launched at CES 2017 with two models. Legion Y520 — the accessible version (15.6" Full HD, Intel Core i5/i7 7th gen, GeForce GTX 1050/1050 Ti graphics).

Legion Y720 — the powerhouse (GTX 1060, Dolby Atmos sound, USB-C/Thunderbolt 3, built-in Xbox wireless receiver). The top model was the 17" Legion Y920 with GTX 1070 and mechanical keyboard.

This split — an affordable model alongside a "Pro" version — became Legion's DNA, lasting to this day (Legion 5 vs Legion 5 Pro vs Legion 7). You can find the full parts list for the most popular model in our guide Legion 5 / 5i.

The Y Series Era and Naming Chaos (2017-2019)

• 2018: Y530 and Y730 — Successors to Y520/Y720; Y530 in plastic, Y730 in aluminum with Thunderbolt 3
• Parallel line: Y7000 — Equivalent models mainly for Asian markets
• 2019: Y540 and Y740 — Now with NVIDIA GeForce RTX 20 graphics (RTX 2060/2070/2080 Max-Q); higher-end Y9000 series also present

The problem: customers couldn't tell Y7000 from Y730 or Y740 — different markets, different names, similar hardware. Lenovo took the lesson.

Naming Reset (2020)

In 2020 the letter "Y" disappeared. Simpler, global names emerged:

• Legion 5 (15"/17") — Mainstream tier (up to RTX 3060, Full HD 120/144 Hz display)
• Legion 5 Pro (16") — Higher tier: 16:10 QHD+ display (2560×1600) 165 Hz, graphics up to RTX 3070
• Legion 7 (16") — Flagship: up to RTX 3080, best displays and cooling. Find spare parts in our guide Legion 7 / S7.

Chassis code guide (useful when buying used): e.g., IMH05/ARH05 (2020), ITH6/ARH7 (2021), IRX8/ARX8 (2023), IRX9/ARP9 (2024), IRX10/IAX10 (2025). The middle letter denotes the processor (I = Intel, A = AMD), and H suffix means the stronger variant.

Maturity: ColdFront, AI Engine, TrueStrike (2021-2025)

Legion ColdFront is Lenovo's proprietary cooling that separates CPU and GPU heat into separate pathways. Each version (3.0, 5.0) improved airflow, letting newer Legions run cooler and quieter during gaming.

Displays have come a long way: starting with IPS Full HD 144/165 Hz, progressing through mini-LED arrays and 240 Hz refresh (2023), to OLED panels in the newest flagships.

TrueStrike Keyboard (since 2023) — designed for gaming: larger travel (~1.5 mm) with soft landing and RGB Spectrum backlighting. Not a mechanical keyboard, but it types and responds far more confidently than typical chiclet switches.

Legion AI Engine (since 2023) — a dedicated chip that in real-time analyzes load and temperature, then dynamically splits power between CPU and GPU — no manual tweaking needed.

Processors and graphics have grown generationally: from GeForce GTX 1050/1060, through RTX 20/30, to RTX 40 (with RTX 4090) and the newest RTX 50; AMD Ryzen H/HX (up to 9955HX3D with 3D V-Cache) and Intel Core i9 HX and Core Ultra HX.

Legion Segmentation Today - For Whom and For What

• Legion 5 — Casual gaming and esports (CS2, Valorant), creators who also game. Roughly 4,000-6,000 PLN
• Legion 5 Pro / Legion Pro 5 — Upper tier (in 2024 Lenovo renamed "Legion 5 Pro" to "Legion Pro 5"): 16:10 QHD+ 165 Hz display. Roughly 6,000-10,000 PLN
• Legion 7 / Legion Pro 7 — Flagship for serious gamers and 4K creators (up to RTX 4090/5090). Roughly 12,000-20,000+ PLN
• Legion Slim 5 / Slim 7 — Lighter, thinner versions for mobile gamers
• Legion Go — Gaming handheld (Windows console, AMD Ryzen Z processors)

How does Legion differ from Lenovo's other offerings? It's gaming/performance hardware — unlike business ThinkPads and budget consumer IdeaPads.

The Secondhand Market and Servicing

Businesses buy Legions (especially Legion 5 Pro Gen 6/7) for creator and esports teams, then return them after 3-4 years of lease. They hit the secondhand market at a fraction of new prices — and that's a great opportunity if you know what to refresh.

In a used Legion, wear typically hits: keyboard, ColdFront fans (louder, dusty), battery, sometimes display or hinges. These components can be replaced — Legions are serviceable, and fans or keyboards often swap without disassembling the entire machine.

We stock the most parts for the most-popular models (Y530, Y540, Y7000, Legion 5 Pro). The complete parts set for these "workhorses" is here: Lenovo Legion Y530 / Y540 / Y7000 spare parts.

Not sure which part fits your model? Send us the serial number (S/N) or the old part's FRU — we'll match it exactly. Note: fans and keyboards vary between generations, so FRU number is the surest match.