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Notebookcheck - Can the Radeon RX 7900M in the Alienware M18 beat the NVIDIA RTX 4080? Can you buy it? (www.youtube.com)

submitted 9 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 9 months ago (3 children)

The battery life is quite horrendous. Bizarre not to offer usb c charging

Just web browsing lasted 85 minutes

The same model with an i9 13950hx and 4090 did 260 minutes.

https://www.notebookcheck.net/AMD-Radeon-RX-7900M-performance-debut-Alienware-m18-R1-laptop-review.771237.0.html

[–] [email protected] 1 points 9 months ago

The culprit is the 7945hx, due to it being chiplet, the iodie is basically a separate processor that can't be turned off.

[–] [email protected] 1 points 9 months ago (1 children)

USB-C probably can't provide the necessary wattage.

As for the battery life, I have no idea. I have a Lenovo Legion all-AMD and it's been quite good. The successor to mine apparently can last up to 9 hours for non-gaming workloads. It sounds to me like Dell messed something up here in a big way.

[–] [email protected] 1 points 9 months ago

USB-C can deliver up to 240w… that should be enough to power any laptop.

[–] [email protected] 1 points 9 months ago (1 children)

Eh its the CPU. It's well known by now the 7945HX is a desktop class chip. It doesn't have any mobile specific optimizations.

Am quite confident something like 7940HS combined with the same 7900M will have much better battery life.

Other RDNA3 based laptops that has 7040HS class CPU paired with them have class leading battery life.

[–] [email protected] 1 points 9 months ago

Other rdna3 laptops top out at the small monolithic navi 33 die though.