RTX 5090 and M4 MacBook Air: Can It Game?
What if you could strap a full desktop GPU to your MacBook Air? Turns out, you can.
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As much as I hate to admit it, step one in most of my projects now is to ask AI about it. Maybe it’ll tell me something I don’t know.
Fortunately, borderline-impractical is kind of my thing.
Ok, so the plan is to plug a big PC gaming GPU, an NVIDIA RTX 5090, into my M4 MacBook Air. To do that, we plug it into a Thunderbolt dock which adapts PCIe to Thunderbolt, and we plug that into a USB-C port.
Thunderbolt tunnels PCIe over a USB-C cable, so from the computer’s perspective a Thunderbolt device really is a PCIe device, not a USB one. You get 4 PCIe lanes at up to 40Gbps on Thunderbolt 4, with a small performance penalty for the tunneling. USB4 includes the same PCIe tunneling as an optional feature, so some non-Thunderbolt USB4 ports can do this too. You can use this to plug a GPU into a laptop with a compatible port.