China has once again produced unusual RTX 4080M graphics cards — unofficial desktop models built around the mobile GeForce RTX 4080 GPU. This is not an NVIDIA product, but a classic Frankenstein card: a laptop GPU is mounted on a custom PCIe board for a regular PC. These cards have no official warranty or standard NVIDIA driver support, so buying one is very much an experiment at your own risk.
The reviewer tested a unit bought for 2,000 yuan, or about $300. Similar cards now reportedly cost 2,700–2,800 yuan, or around $400. In that range, the RTX 4080M competes in China with the new Radeon RX 9070 GRE and GeForce RTX 5060 Ti, although the RX 9070 GRE is noticeably more expensive at roughly 3,600–4,000 yuan.
The test system included an Intel Core Ultra 7 270K Plus, a Maxsun Z890-A motherboard and 32 GB of DDR5-8200 memory. In 3DMark Time Spy, the modified RTX 4080M scored 18,600 points, while another user with a similar card reported about 19,500 points. Power draw is the interesting part: during testing, the card consumed roughly 100 W, even though the mobile RTX 4080 can have a limit of up to 175 W. The reason may be a custom BIOS, power limits or driver quirks.
Gaming performance was mixed. In PUBG at 1440p with ultra settings, the RTX 4080M delivered more than 340 FPS versus about 240 FPS for the RX 9070 GRE. In Delta Force at 4K Ultra, it also slightly beat the Radeon, at around 100 FPS versus 90 FPS. But other games favored AMD: in Forza Horizon 5 at 1440p Low, the mobile RTX 4080 on a desktop board managed 214 FPS, while the RX 9070 GRE reached 297 FPS, and in Cyberpunk 2077 at 4K High the gap was 49 FPS versus 76 FPS.
Across the tested games, the RTX 4080M was about 6% slower than the RX 9070 GRE, while still being 22–30% cheaper. In heavier AAA titles, where the Radeon performs better, the modified NVIDIA card falls behind by around 17%. With its low power use and aggressive price, the card looks curious, but the lack of official support and warranty makes it more of an enthusiast toy than a mainstream purchase.