Fusion Workstation Guide: What Computer Do You Need for Autodesk Fusion?

Fusion runs on a wider range of hardware than any other Autodesk design product. Autodesk's own minimum specification is written for low-power laptops, and for learning CAD or slicing a model for a 3D printer that is enough. It stops being enough when an assembly runs into the hundreds of components, a parametric timeline grows long, a toolpath takes twenty minutes to generate, or a simulation or render holds the processor at full load for an hour. The gap between a machine that copes with professional Fusion work and one that does not comes down to a few decisions about cores, clock speed, memory and graphics, and those decisions are cheap to get right at purchase and expensive to fix later. This guide is written by Modena Technologies, Africa's only Autodesk Platinum Partner and an Autodesk Authorised Training Centre, and by Modena Computers, which builds and stress-tests workstations in Cape Town. We support Fusion users, train them and specify their hardware every working day.

The guide covers what Autodesk officially requires, how Fusion actually uses each component, the thresholds we work to when we specify a machine, and which Modena Computers configuration suits which kind of Fusion user, from product design and 3D printing through CAM and simulation. We have deliberately avoided naming processor and graphics card models so that the principles stay useful as components change. The exact parts in each configuration are on the Apollo and Vulcan product pages.

What Autodesk officially requires

Fusion is updated continuously rather than in yearly releases, so Autodesk publishes one current set of requirements with a minimum and a recommended column. Autodesk is unusually direct about what each column means. The minimum is for "legacy hardware or newer ultraportable, low-power devices" and "may struggle to navigate hundred-component assemblies, long chains of parametric design history, or mission-critical toolpaths". The recommended column is "a minimum hardware performance baseline for professionals". These are the current Windows figures.

	Minimum	Recommended
Processor	2 performance cores, 4 threads, 3GHz or higher turbo clock	8 or more performance cores, 16 or more threads, 3GHz or higher base clock
Memory	8GB	32GB or more
Graphics	1GB, integrated or dedicated, DirectX 11	8GB or more dedicated graphics memory, DirectX 11
Display	1366 x 768 at 100% scaling	3840 x 2160 (4K) at 200% scaling with high-resolution canvas graphics
Storage	8.5GB on a hard drive	15GB or more on a solid-state drive for installation and cached data
Internet	5Mbps download, 1Mbps upload	25Mbps or more download, 5Mbps upload
Operating system	64-bit Windows 11	Same

Autodesk adds a note on graphics that deserves a plain reading. For professional use it recommends certified graphics hardware, meaning professional-series cards whose drivers have been tested with Fusion, and it describes current consumer cards as "generally compatible" but not validated. We come back to what that means in practice in the graphics section.

How Fusion uses a computer

Autodesk summarises it in two sentences: toolpath generation and simulation are multi-threaded and benefit from more cores, while the user interface and many modelling operations benefit from higher single-threaded clock speed. That split is the key to specifying a Fusion workstation. Sketching, constraining, extruding, filleting and recomputing a parametric timeline run largely on one core at a time, so the speed of that core sets how responsive Fusion feels all day. Generating a 3D adaptive clearing toolpath, running a static stress or thermal study locally, and rendering in the Render workspace spread across every core you have, so core count sets how long you wait.

Rendering is worth singling out because it surprises people. Fusion's local and in-canvas rendering is CPU ray tracing. Autodesk's own support note confirms that a local render drives the processor to 100% while the graphics card sits idle. The graphics card in a Fusion workstation drives the viewport, the canvas effects and the display resolution; it does not shorten render times. If you render a lot and would rather not tie up your machine, Fusion also offers cloud rendering, and the same is true of simulation and generative design, which can run on Autodesk's servers for cloud credits. That is why a reliable internet connection appears in Autodesk's requirements and why the local processor matters most to people who render, simulate or generate toolpaths on their own machine.

Memory and graphics drivers show up in Autodesk's performance troubleshooting more than anything else. The documented causes of slow Fusion files are long timelines, assemblies of roughly a thousand components or more, complex imported geometry and outdated graphics drivers. Fusion also caches your cloud data locally, so the drive it caches to affects how quickly designs open and save.

Processor: clock speed for modelling, cores for everything that waits

Autodesk's recommended processor has 8 or more performance cores at a base clock of 3GHz or higher. Both halves matter. The base clock is what the processor guarantees under sustained load, and it is what you feel during a long timeline recompute or a toolpath calculation; the turbo figure on the box is what it reaches briefly when cool and lightly loaded. For sketching and modelling, which run on one core, sustained single-core speed is what makes Fusion feel quick.

Clock speed is not comparable across processor generations. A newer processor completes more work per cycle than an older one at the same frequency, so compare processors on current single-core benchmarks rather than on GHz alone. For the same reason, be wary of high-core-count workstation and server processors unless you spend most of your day in simulation or rendering: they usually run at lower clock speeds, so they are slower in the modelling work that fills most of a Fusion user's day, and cost far more.

Where more cores earn their place is clear. If you generate toolpaths every day, run simulations locally, render locally rather than in the cloud, or convert large meshes, each additional core shortens the wait. Autodesk's "performance cores" wording is deliberate: current desktop processors mix full-speed performance cores with smaller efficiency cores, and it is the performance cores that do Fusion's heavy work. We configure and test for this on every build. Fusion also needs at least four threads to run stably, which rules out the very low-end processors in budget laptops.

Memory: assemblies, timelines and what else is open

Autodesk's recommendation is 32GB or more, and unlike some Autodesk products it does not publish tiers by assembly size. How much you need depends on the number of components in your assemblies, the length of your parametric timelines, whether you run simulation or CAM alongside design, and how many other applications stay open. A design of a few hundred components with a modest timeline is comfortable in 32GB. Autodesk flags roughly a thousand components as the point where performance problems begin to appear, and memory is part of the reason.

The thresholds we use are these. 32GB is the floor; it matches Autodesk's recommended column and covers product design, 3-axis CAM and 3D printing workflows with a browser, email and a slicer open alongside. 64GB is for assemblies approaching or passing a thousand components, long parametric timelines, local simulation, or CAM on complex parts while other applications run. 96GB or more is for very large assemblies, mesh and scan data, and heavy local simulation. If you are unsure, open your largest design with your usual applications running and check the memory figure in Windows Task Manager; above 70% of what you have, you need more.

Memory in matched pairs running in dual channel is how every configuration we sell is built, and all Modena Computers workstations can be upgraded to 192GB later.

Graphics: 8GB and a current driver, and what "certified" means

Autodesk's recommended graphics card has 8GB or more of dedicated memory with DirectX 11 support, and its recommended display is a 4K monitor at 200% scaling with high-resolution canvas graphics turned on. The card's job in Fusion is the viewport: smooth orbiting and zooming of large assemblies, the canvas effects in the Quality graphics preset, and driving a 4K display. Autodesk's performance articles treat an outdated driver, or a laptop quietly running Fusion on its integrated graphics instead of the dedicated card, as two of the most common causes of poor performance.

Our thresholds: 8GB of graphics memory is the floor for any new Fusion workstation, 12GB or more keeps a 4K display with the Quality preset smooth on large assemblies, and 16GB is for people who also run GPU-accelerated visualisation tools alongside Fusion. Every configuration in our range starts at 8GB. Remember that Fusion's own rendering runs on the processor, so more graphics memory does not shorten render times.

On certified cards: Autodesk lists professional-series graphics cards as certified for professional Fusion use, meaning their drivers have been tested by the card vendor or Autodesk, and describes consumer cards as generally compatible but not validated. In practice, a current consumer card with 8GB or more meets the recommended specification, is what the large majority of professional Fusion users run, and performs the same or better for the money. The difference is validation and a certified driver stream, not speed. We build with consumer cards by default because they are better value for Fusion, and we fit a professional-series card where a client's IT policy or another application requires one. What matters either way is a current, stable driver, which is part of our build process.

Storage: NVMe for the installation and the cache

Fusion itself is small, at about 8.5GB, but Autodesk recommends 15GB or more on a solid-state drive for installation and cached data, and the cache is the point. Fusion stores your designs in the cloud and keeps a local copy of what you are working on; opening, saving and switching between designs all go through that cache, and so do the files you export for machining or printing.

An NVMe drive is the only sensible choice for the operating system, Fusion and its cache. Read and write speeds of around 2,000MB/s are a reasonable floor. On capacity, 1TB serves most design and 3D printing users. Choose 2TB if you machine from large stock simulations, work with scan or mesh data, keep large libraries of exported files, or run other large applications alongside Fusion.

Cooling and sustained performance

Of all the Autodesk products we specify for, Fusion is the one where cooling matters most, because its heaviest work holds every core at full load for the longest. A local render, a simulation study or a complex toolpath can keep the processor at 100% for an hour. If the cooler and case cannot carry that heat away, the processor drops its clock speed to protect itself and the job takes longer; to the user it looks like Fusion being slow, when the cause is thermal. Autodesk's own troubleshooting even lists an eco or power-saving Windows power mode as a cause of poor Fusion performance, which is the same effect by another route.

A substantial air cooler with good case airflow will hold a non-overclocked processor at its rated speed indefinitely, and that is how we build Apollo. Processors tuned above their standard settings need a large liquid cooler to sustain the gain, which is why Vulcan uses a 360mm radiator and holds its speed through an hour-long render rather than only in short bursts. A power supply rated well above the system's actual draw runs cooler, quieter and longer. Every Modena Computers workstation runs under sustained full load before it leaves Cape Town, so throttling, instability and noisy fans are found on our bench rather than at your desk.

Why a gaming PC is not a Fusion workstation

Fusion's low minimum specification makes a gaming PC look like an easy answer, and for a hobbyist modelling small parts it can be. A gaming PC is built to one brief: frame rate at a given price. That brief puts the budget into the graphics card, which is the component Fusion leans on least, and takes it from the processor, memory and cooling, which are the components Fusion leans on most. The typical result is 16GB of memory, often in a single stick, a processor chosen for gaming rather than for sustained all-core performance, a compact case with the airflow of a compact case, and a power supply sized to the exact components in it. The graphics card is frequently an entry-level model with 4GB to 6GB of memory, below Autodesk's recommended 8GB.

None of those compromises shows on a spec sheet. They show later as a machine that needs a memory upgrade once assemblies grow, throttles halfway through a toolpath or render, and runs its fans flat out while a simulation solves. A well-specified gaming PC can run Fusion, but it was not specified for Fusion, and when a driver update produces the yellow "graphics driver or hardware may be limiting performance" banner, the support line has not heard of it. A workstation built for Fusion starts from the work you do, is tested under the loads you will put on it, and comes with a warranty and support from people who use the software.

Which Modena Computers workstation for which Fusion user

We build two models in three configurations each. Apollo uses a standard processor with a high-performance air cooler; Vulcan uses a tuned processor with a 360mm liquid cooler, more cores and faster storage. Both carry a four-year warranty and lifetime hardware support, both are built to order in Cape Town, and both are delivered anywhere in South Africa.

Because Fusion rewards cores for CAM, simulation and local rendering, Vulcan earns its place for more Fusion users than it does for most Autodesk software. Designers and 3D printing users who rarely wait on a toolpath or a render are well served by Apollo.

Configuration	Memory	Graphics memory	Suits
Apollo Standard	32GB	8GB	Product design, parametric modelling, small to medium assemblies, 3D printing workflows, 3-axis CAM on simple parts
Apollo Pro	48GB	8GB	Larger assemblies and longer timelines, CAM with stock simulation, several applications open alongside Fusion
Apollo Max	64GB	12GB	Assemblies around a thousand components, occasional local simulation, a 4K display with the Quality graphics preset
Vulcan Standard	32GB	8GB	Designers and machinists who generate toolpaths or render locally every day and want the fastest sustained clock speed with more cores
Vulcan Pro	64GB	12GB	Heavy CAM including multi-axis toolpaths, regular local simulation and rendering, large assemblies at 4K
Vulcan Max	96GB	16GB	Very large assemblies, heavy local simulation and rendering, mesh and scan data, several heavy applications at once

If your work goes beyond this, for example large-scale simulation or rendering farms, we build custom specifications up to 192GB of memory and 32GB of graphics memory. Tell us what you work on and we will specify the machine for it.

See all configurations and current prices Request a custom spec

Frequently asked questions

Is a gaming PC good enough for Fusion?

For a hobbyist modelling small parts, usually yes. For professional work it is the wrong shape: gaming PCs put the budget into the graphics card, which Fusion uses least, and skimp on memory, sustained processor performance and cooling, which Fusion uses most. If you buy one for Fusion, insist on 32GB of memory, a processor with 8 or more performance cores, an 8GB graphics card and a cooler that can hold full load for an hour.

How much RAM does Fusion need?

Autodesk recommends 32GB or more. We specify 32GB as a floor, 64GB for assemblies approaching a thousand components, long timelines or local simulation, and 96GB or more for very large assemblies, mesh and scan data and heavy simulation.

Does Fusion use the graphics card?

For the viewport, yes: orbiting, zooming, canvas effects and a 4K display all depend on it, and Autodesk recommends 8GB or more. For rendering, no: Fusion's local rendering is CPU ray tracing and the graphics card sits idle, so a bigger card does not shorten render times. More processor cores or cloud rendering do.

Does Fusion use multiple cores?

Yes, more than most Autodesk software. Autodesk says toolpath generation and simulation are multi-threaded, and local rendering uses every core. Sketching, modelling and the user interface still depend on single-core clock speed, which is why Autodesk recommends 8 or more performance cores at 3GHz or higher rather than either on its own.

Do I need a certified or professional graphics card for Fusion?

Autodesk lists professional-series cards as certified for professional use. A current consumer card with 8GB or more meets the recommended specification and is what most professional Fusion users run; the difference is driver validation, not speed. We build with consumer cards by default and fit a professional card where a client's policy or another application requires it.

Is Intel or AMD better for Fusion?

Either. Autodesk supports both. What matters is sustained single-core speed for modelling, 8 or more performance cores for toolpaths, simulation and rendering, and cooling that holds the speed under load. We build on whichever platform delivers that best at the time, and the current components are listed on each product page.

Should I buy a laptop or a desktop for Fusion?

Fusion is the Autodesk product that runs best on a laptop, and for design and 3D printing on the move a well-specified laptop with a dedicated graphics card and 32GB is workable. For CAM, simulation or local rendering, choose a desktop: laptop processors run at lower sustained speeds in a thinner thermal envelope, and the same budget buys considerably more cores, memory and cooling in a desktop.

Can I upgrade a Modena Computers workstation later?

Yes. Memory can be increased to 192GB, the graphics card and storage can be replaced, and the four-year warranty and lifetime hardware support continue. Most clients start at the configuration they need today and add memory when their assemblies grow.

Next step

Browse the Modena Computers workstations to see the current configurations and prices, or contact us with the kind of designs you produce, whether you machine, simulate or render, and anything you run alongside Fusion, and we will tell you which configuration fits, or build one that does.