Best PC for 3D rendering: the specs that really matter
Short answer
For 3D rendering, the part that matters most is the graphics card: an NVIDIA RTX with at least 12 GB of video memory for Blender Cycles, Redshift or Octane. Then come 32 GB of RAM, a recent processor with 8 cores or more, and an NVMe SSD. A CPU engine such as Corona reverses the priority: the number of processor cores decides the render time.
Reference point: a high-end card at around €2,000 is worth about 690 hours of rendering on a TURNA machine at €2.90/h. Below that volume, renting costs less than buying; above it, the card pays for itself.
A configuration for 3D rendering is not chosen the way you choose a gaming PC. The graphics card remains the central part, but its memory matters as much as its speed, and the right balance depends on the render engine you use. This guide starts from Blender, the most common case, and points out what changes for other engines.
Which graphics card for 3D rendering?
With a GPU engine (Cycles, Redshift, Octane, V-Ray GPU), the graphics card does most of the work. Three criteria, in this order:
- Compatibility. NVIDIA cards are supported by every GPU engine, and RTX models accelerate ray tracing with OptiX. AMD (HIP) and Intel Arc (oneAPI) cards work with Cycles, but several commercial engines were designed for NVIDIA first: check before you buy.
- Video memory (VRAM). The whole scene, geometry and textures, has to fit on the card. A scene that overflows renders much more slowly, or stops with an out-of-memory error.
- Computing power. With the same amount of memory, a recent generation renders faster. The table below gives an order of magnitude.
Blender render speed score by card
| Card | Score | Speed relative to an RTX 4090 |
|---|---|---|
| RTX 4090 | 152 | 100% |
| RTX 3080 | 68 | 45% |
| Mac M1/M2 Max | 45 | 30% |
| RTX 3060 | 40 | 26% |
| RTX 2060 | 30 | 20% |
| GTX 1060 / 1660 | 12 | 8% |
These scores are the ones used by the render time calculator, aligned with the public Blender Open Data results with OptiX. They give an order of magnitude: the real gap depends on the scene. A card at 40% of the speed of an RTX 4090 takes about two and a half times as long on the same frame. The top of the Blender Open Data ranking and the times measured on our machines are on the Blender benchmark page (in French).
How much VRAM do you need?
- 8 GB: learning, single objects, simple scenes in Full HD.
- 12 to 16 GB: most professional projects, interiors, products, short animations.
- 24 to 32 GB: very detailed scenes, dense vegetation, 8K textures, large simulations.
Two consumer cards currently have 24 GB or more: the RTX 4090 (24 GB) and the RTX 5090 (32 GB). In Blender, with Cycles, the header of the render window shows the memory used: do a test render to see where your scene stands before you buy.
The processor and RAM
With a GPU engine, the processor prepares the scene before the card renders it: loading textures, building acceleration structures, modifiers, simulations. A recent model with 8 to 16 cores is enough; beyond that, the gain on the render itself is small. With a CPU engine (Corona, V-Ray CPU, Arnold CPU), it is the other way round: render time drops almost in proportion to the number of cores.
For RAM, count on 32 GB to work comfortably and 64 GB for large scenes and simulations. Add an NVMe SSD: cache files and textures load much faster than from a conventional hard drive.
Laptop or Mac for 3D rendering?
A laptop is fine for learning, modelling and rendering still images. For animations, two limits weigh in: heat, which lowers clock speeds on long renders, and the graphics card, which has the same name as its desktop equivalent but draws less power, renders more slowly and often has less video memory. An "RTX 4090 Laptop" does not perform like a desktop RTX 4090.
On a Mac with Apple silicon, Cycles renders on the GPU through Metal, and unified memory lets it load large scenes. In raw rendering speed, a Max chip is still far behind a high-end RTX card, as the table above shows. The guide Blender on Mac covers installation, enabling Metal and what to expect from each model.
Should you buy or rent computing power?
The calculation is simple. Take the price of the card you are considering and divide it by the price of one hour of rented rendering: you get the number of render hours from which buying pays off, leaving aside electricity and resale value. With a card at around €2,000 and an hour of rendering at €2.90, the threshold is about 690 hours of rendering.
If you render every day, you will go past that threshold and the card pays for itself. If heavy renders come in bursts (an animation before a delivery, a competition, a series of images for a client), renting when you need it avoids tying up your budget, and lets you split an animation across several machines at once. The GPU rental for 3D rendering page (in French) details the tiers. The article buying a 3D PC or renting a render farm (in French) goes through this calculation item by item. To estimate how long a specific project will take, the render time calculator compares your machine with a render split across several machines.
Frequently asked questions
Which graphics card should you get for 3D rendering?
An NVIDIA RTX card remains the safest choice: every GPU engine supports it, and both Cycles and V-Ray use its ray tracing cores through OptiX. Aim for at least 12 GB of video memory to work comfortably, and 16 GB or more for heavy scenes.
What is the best NVIDIA card for 3D rendering?
Among consumer cards, the RTX 5090 with its 32 GB of video memory is the most powerful, followed by the RTX 4090 with 24 GB. On a tighter budget, a recent RTX card with 12 to 16 GB of video memory covers most projects. Beyond speed, video memory is what decides whether a large scene fits.
How much VRAM do you need for 3D rendering?
8 GB is enough for learning and for simple scenes. 12 to 16 GB suits most professional projects. Beyond that, for very detailed interiors, forests or large simulations, 24 to 32 GB keeps the scene from overflowing the card.
Does the CPU matter for GPU rendering?
Less than the graphics card, but it is not neutral: it prepares the scene before rendering, loads the textures and runs the simulations. For a CPU engine such as Corona, on the other hand, the number of cores directly decides the render time.
Is a laptop good enough for 3D rendering?
For learning and for still images, yes. For animations, it heats up and slows down on long renders, and a laptop graphics card is much less powerful than the desktop card with the same name, often with less video memory.
Should you buy a PC or rent computing power for rendering?
If you render every day, a good graphics card pays for itself. If heavy renders come in bursts, before a delivery, renting machines when you need them often costs less than tying up money in a high-end card.
Rendering the animation on TURNA
When a scene is already well optimised and the frame count is what takes the time, the remaining lever is rendering several frames at once. TURNA does this for Blender: an add-on (Blender 4.0 to 5.2, Cycles and Eevee) sends the scene in one click, and the frames are split across 1, 2, 4 or 8 GPUs in parallel, RTX 5090 first and RTX 4090 when none is free. The add-on shows the estimated cost before anything starts. Prices start at €2.90 per hour, billed on the time actually used, with a 30-second minimum, and new accounts get €25 of free credit. A single still image is still rendered by one machine, so the gain is on animations. Tiers and worked examples are on the Blender render farm page.
TURNA machines use NVIDIA cards: RTX 5090 first, RTX 4090 otherwise. To choose a render engine before choosing the hardware, see the guide 3D rendering software (in French).
