AMD has launched the Radeon RX 7900M, its RDNA 3 flagship for gaming laptops, and the first in years. Based on the RDNA 3 graphics architecture, the 7900M will power Alienware’s m18 gaming laptops. Like its desktop brethren, it leverages a chiplet design with a Navi 31 GPU at its heart.
The Radeon RX 7900M features 4,608 shaders across 72 Compute Units alongside 16GB of GDDR6 memory. It uses a 256-bit bus, backed by 64MB of Infinity or L3 Cache.
| GPU | uArc | Compute Units | Shader Count | GPU Boost | Memory Capacity | Infinity Cache | Memory Bus | TGP |
|---|---|---|---|---|---|---|---|---|
| Radeon RX 7900M | RDNA 3 | 72 | 4608 | 2090 MHz | 16 GB GDDR6 | 64MB | 256-bit | 180W |
The graphics core has a “Game Clock” of 1,825MHz and a peak boost clock of 2,090MHz. It has a TGP of 180W. These specifications place the Radeon RX 7900M next to the Navi 31-based RX 7900 XT (desktop) which features 5,376 cores (84 CUs) and 20GB of GDDR6 memory.
Being a notebook GPU with a slimmer bus and lower power budget, it should perform closer to the RX 7800 XT even though the latter leverages the smaller Navi 32 GPU.
AMD’s official gaming benchmarks of the Radeon RX 7900M claim an average lead of 7% over the NVIDIA RTX 4080 mobile. This figure includes rasterization and ray-tracing titles. In the former, the 7900M maintains a 15% lead over the RTX 4080 with an average of 104 FPS.
In games like Cyberpunk 2077, Borderlands 3, and Far Cry 6, it beats the GeForce card by as much as 38%. Additionally, as is the case with the Radeon desktop family, it offers 33% (or 4GB) more memory than the RTX 4080.
Coming to the Alienware m18, an AMD Advantage laptop, you’ll be able to choose between the Ryzen 7 7745HX (8C/16T), Ryzen 9 7845HX (12C/24T), and the 7945HX (16C/32T). On the GPU side, you can choose between the GeForce RTX 4060, 4070, 4080, 4090, or the Radeon RX 7600M XT/7900M. You can opt for a 1080p or 1440p display with refresh rates of up to 480Hz and 165Hz, respectively.
Memory options vary from 16GB (DDR5-4800, Dual Channel) to 64GB with two SODIMMs. For storage, you can opt for a single, dual, or triple-drive SSD configuration. These include NVMe and M.2 drives, ranging from 512GB to 8.5TB.
The Alienware m18 with a Radeon RX 7900M start at $2,799.99, $50 less than its GeForce RTX 4080 mobile counterpart.
