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eGPUs do work, but they come with some notable limitations
External graphics processing units (eGPUs) offer a practical way to boost gaming performance on laptops without purchasing an entirely new machine, particularly amid high RAM pricing. Whilst the technology is improving—with Razer reviving its eGPU line and Framework developing new options—these solutions come with significant limitations including reduced performance over wireless connections and substantial additional costs.
eGPUs typically operate 7 to 32 percent slower than desktop graphics cards due to Thunderbolt's bandwidth constraints, with the performance gap widening when using high-end GPUs. A Thunderbolt 4 port provides only 40 Gbps of bandwidth with 32 Gbps allocated to PCIe data—roughly an eighth of a desktop slot's capacity. When accounting for the cost of an eGPU enclosure (£250-350), power supply, additional dock hardware (£390+), and the graphics card itself, the total expense often rivals or exceeds purchasing a dedicated budget gaming PC. Apple Silicon Macs cannot use eGPUs for gaming at all, though Framework's alternative OCuLink connection offers higher bandwidth (128 Gbps) with the tradeoff of reduced convenience.
In short
- eGPUs boost laptop gaming but run 7-32% slower than desktop GPUs due to bandwidth limits
- Complete setups cost hundreds of pounds; often cheaper to buy a budget gaming PC instead
- Apple Silicon Macs cannot use eGPUs for gaming; OCuLink offers better performance but less convenience
Steelman: both sides, in good faith
The strongest fair case each way — we don't pick a winner.
The case for
eGPUs can extend a laptop’s useful life and add gaming performance without replacing the whole machine, which may be attractive when RAM and new computers are expensive. For people who value portability and already own a compatible laptop, accepting some performance loss and extra setup can still be worthwhile, while newer options such as OCuLink may improve performance.
The case against
The performance gains come with meaningful compromises: Thunderbolt limits bandwidth, the shortfall can grow with higher-end graphics cards, and wireless connections reduce performance further. Once the enclosure, power supply, dock hardware and graphics card are included, the cost can match or exceed a budget gaming PC; compatibility limits, including the lack of eGPU gaming support on Apple Silicon Macs, narrow the appeal further.
Explained simply
A laptop’s built-in graphics chip handles games and other demanding visual tasks, but it may struggle with newer titles. An external graphics processing unit, or eGPU, is a separate graphics card in a case that connects to a laptop, usually through a Thunderbolt port.
The main players are laptop makers such as Razer and Framework, which offer or are developing ways to connect these units, and the people choosing between upgrading a laptop and buying a gaming computer. The connection carries less data than the slot used by a graphics card inside a desktop, so an eGPU can be slower than the same card in a desktop.
An eGPU also requires a case and may need extra power or dock equipment, adding to the cost of the card itself. Some connections can offer more bandwidth but are less convenient, and Apple Silicon Macs do not support eGPUs for gaming.
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