If you are asking whether your laptop has a MUX switch, you are really asking whether its discrete GPU can drive the built-in screen directly. Without one it cannot. The frames go through the integrated graphics first, and you lose performance you already paid for.
Of the 179 laptops we list, 117 have no discrete GPU at all, so the question does not apply to them. 42 state how they route it. The remaining 20 say nothing, which on a gaming machine is not a good sign.
What a MUX switch actually does
Three arrangements exist, and the names are worse than the concept.
Optimus. The discrete GPU renders, then copies the finished frame across to the integrated GPU, which owns the laptop display. That copy costs you frames and adds a little latency. It is good for battery, because the discrete GPU can idle completely when nothing needs it.
MUX switch. A physical multiplexer lets the discrete GPU take the display directly. You get the frames back. You normally reboot to change mode, and the dGPU stays awake, so battery life drops.
Advanced Optimus. A MUX that switches on its own without a reboot, and keeps G-Sync working. It is the version you want, and it is the one that costs the manufacturer most.
How many laptops have a MUX switch?
Counting only the machines that state it:
Narrow it to the machines where it matters, gaming laptops and mobile workstations with a discrete GPU, and 33 state a mode. 25 of those have a MUX or Advanced Optimus. 8 are plain Optimus.
The eight that still ship without one
They are not old stock. Three are 2025 models.
- Lenovo Legion 5 Gen 10 15AHP10, RTX 5060, 2025
- Acer Nitro V 15 ANV15-52, RTX 5050, 2025
- Lenovo LOQ 15IRH8, RTX 4060 and RTX 4050 versions
- Dell G15 5530, RTX 4060
- HP Victus 15-fb, RTX 3050
- ASUS TUF Gaming A15 FA506, RTX 3060
- ASUS ROG Strix Scar 15 G532LWS, RTX 2070 Super
The pattern is the budget line. Victus sits under Omen, LOQ sits under Legion, Nitro V sits under Predator, G15 sits under Alienware. The MUX is one of the things cut to hit the price.
Two Acer Nitro V models, same GPU, different answer
This is the clearest example in our data of why the model number matters more than the spec sheet.
Lenovo does the same thing inside one generation. The Legion Pro 7i Gen 10 with an RTX 5080 has Advanced Optimus. The Legion 5 Gen 10 with an RTX 5060, same year, is Optimus only.
Which brands fit them
Among the gaming and workstation machines we list that state a mode, ASUS has the most MUX implementations at five, all in ROG and TUF. Lenovo has the most Advanced Optimus at five, all Legion. HP's three are all ZBook or Omen, not Victus.
Workstations are better served than you might expect. Four of the MUX machines are mobile workstations, the HP ZBook Fury 16 G11 and ZBook Power 16 G11, the Dell Precision 5690 and the ThinkPad P16 Gen 2, where driving an external colour-critical display from the dGPU is the point.
One outlier worth naming: the Framework Laptop 16 has a MUX and a removable graphics module, which is the only machine in our list where the discrete GPU itself is a user-replaceable part.
How to check before you buy
Read the model number, not the GPU. The GPU tells you nothing about routing. Two laptops with the same RTX 5050 differ, as above.
Treat silence as a no. 20 of the laptops we list with a discrete GPU do not state a mode. Manufacturers advertise a MUX when they have one, because it is a selling point against the model below.
Check whether it is Advanced. Plain MUX means rebooting to switch, which in practice means most people pick one mode and leave it. If you want battery life on the move and frames when docked, Advanced Optimus is the one that does both without a restart.
If you already own the laptop, look in the vendor control panel: Armoury Crate on ASUS, Lenovo Vantage, Omen Gaming Hub, NitroSense. A GPU mode or display mode setting that offers "Discrete" or "Ultimate" means a MUX is present. If the only option is automatic, it is Optimus.
You can filter our laptop catalogue by graphics switching along with panel type, memory slots and weight. If you are still choosing a machine, the laptop buying guide covers the rest of the decision, and the laptop GPU tier list ranks the mobile parts themselves.
Related reading: Best Laptops for Game Development, five buying tiers measured against Epic's published Unreal Engine spec.
Per-game buying guides, each tiered against the publisher's own published requirements: Counter-Strike 2, Rust, Helldivers 2 and Monster Hunter Wilds.