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Lenovo Legion Pro 7 (16ARX8H) — RAM, SSD and Charger Compatibility
The Legion Pro 7 16ARX8H is Lenovo’s Gen 8 AMD flagship — a 16-inch machine built around the 16-core Ryzen 9 7945HX with an RTX 4080 or 4090 Laptop GPU. Memory and storage are both user-accessible, which is not a given at this tier.
| Component | Specification |
|---|---|
| Processor | AMD Ryzen 9 7945HX — 16 cores / 32 threads, 2.5GHz base, 5.4GHz boost |
| RAM | DDR5-5200 SO-DIMM × 2 — not soldered |
| Max RAM | 32GB (Lenovo’s tested maximum) |
| Storage | 2 × M.2 2280, PCIe 4.0 x4 — no 2.5in bay, no card reader |
| Charger | 330W slim-tip GaN (USB-C port accepts up to 140W PD) |
| GPU | NVIDIA RTX 4080 Laptop (12GB GDDR6) or RTX 4090 Laptop (16GB GDDR6), both 175W TGP |
| Ports | 4 × USB-A 3.2 Gen 1, 2 × USB-C 3.2 Gen 2 (one with 140W PD), HDMI 2.1, RJ45, 3.5mm |
| Display | 16in WQXGA 2560 × 1600 IPS, 240Hz, 500 nits, 100% sRGB |
| Weight | Under 2.8 kg (6.17 lb) |
Memory
Two DDR5 SO-DIMM slots, nothing soldered. Note the speed: the modules Lenovo fits are physically DDR5-5600 parts but the Ryzen 9 7945HX runs them at DDR5-5200, so paying for faster memory buys nothing here.
Lenovo’s tested ceiling is 32GB. Larger modules may work, but 32GB is what Lenovo validates and what we are willing to state.
Storage
Two M.2 2280 slots at PCIe 4.0 x4, both user-accessible, up to 1TB each in Lenovo’s own configurations. There is no 2.5-inch bay and no SD card reader on this model.
Power and charging
The Legion Pro 7 ships with a 330W slim-tip GaN adapter — Lenovo’s rectangular slim-tip connector, not a round barrel. There is also a 140W USB-C Power Delivery input on one of the Type-C ports, using Lenovo’s own standard.
The 140W USB-C route is genuinely useful for travel, but it will not sustain a 7945HX and a 175W GPU together. Use the 330W adapter for gaming.
Before you buy a part
Distinguish the Pro 7 from the Legion Slim 7 and the Intel-based 16IRX8H before buying parts. The Slim 7 uses soldered LPDDR5x in several configurations, so memory that fits the Pro 7 will not fit it.
Frequently Asked Questions
Can I upgrade the RAM in the Legion Pro 7 16ARX8H?
Yes — two DDR5 SO-DIMM slots, nothing soldered. Lenovo’s tested maximum is 32GB, and the memory runs at DDR5-5200 regardless of the module rating.
How much VRAM does the RTX 4090 have in this laptop?
16GB of GDDR6. The 24GB figure belongs to the desktop RTX 4090 — no laptop RTX 4090 has 24GB.
Can I charge it over USB-C?
Yes, at up to 140W using Lenovo’s Power Delivery implementation, but that is a travel option. Gaming needs the 330W slim-tip adapter.
Is there a Legion 7 Gen 8?
No. Lenovo dropped the plain “Legion 7” name after Gen 7. The Gen 8 machines are the Legion Pro 7 / Pro 7i and the Legion Slim 7 / 7i.
Correction note: this page previously covered a “Lenovo Legion 7 Gen 8”. Lenovo retired the plain “Legion 7” name after Gen 7; the Gen 8 flagship is the Legion Pro 7, and the Ryzen 9 7945HX and RTX 4090 configuration described on the old page matches the 16ARX8H exactly. It has been rewritten to cover the Lenovo Legion Pro 7 (16ARX8H), which is the product readers looking for that name are most likely to want. Specifications here are taken from the manufacturer’s own documentation.
