GeForce RTX 4090 Max-Q vs Radeon RX 7990 XTX
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | RDNA 3.0 (2022−2024) | Ada Lovelace (2022−2024) |
| GPU code name | Navi 31 | AD103 |
| Market segment | Desktop | Laptop |
| Release date | 2023 (1 year ago) | 3 January 2023 (1 year ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 6144 | 9728 |
| Core clock speed | 2500 MHz | 930 MHz |
| Boost clock speed | 3599 MHz | 1455 MHz |
| Number of transistors | 57,700 million | 45,900 million |
| Manufacturing process technology | 5 nm | 4 nm |
| Power consumption (TDP) | 405 Watt | 80 Watt |
| Texture fill rate | 1,382 | 442.3 |
| Floating-point processing power | 88.45 TFLOPS | 28.31 TFLOPS |
| ROPs | 192 | 112 |
| TMUs | 384 | 304 |
| Tensor Cores | no data | 304 |
| Ray Tracing Cores | 96 | 76 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| Length | 287 mm | no data |
| Width | 3-slot | no data |
| Supplementary power connectors | 3x 8-pin | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR6 | GDDR6 |
| Maximum RAM amount | 24 GB | 16 GB |
| Memory bus width | 384 Bit | 256 Bit |
| Memory clock speed | 3000 MHz | 1750 MHz |
| Memory bandwidth | 1.15 TB/s | 448.0 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x HDMI 2.1a, 2x DisplayPort 2.1, 1x USB Type-C | Portable Device Dependent |
| HDMI | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 12 Ultimate (12_2) |
| Shader Model | 6.7 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.2 | 3.0 |
| Vulkan | 1.3 | 1.3 |
| CUDA | - | 8.9 |
Pros & cons summary
| Maximum RAM amount | 24 GB | 16 GB |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 405 Watt | 80 Watt |
RX 7990 XTX has a 50% higher maximum VRAM amount.
RTX 4090 Max-Q, on the other hand, has a 25% more advanced lithography process, and 406.3% lower power consumption.
We couldn't decide between Radeon RX 7990 XTX and GeForce RTX 4090 Max-Q. We've got no test results to judge.
Be aware that Radeon RX 7990 XTX is a desktop card while GeForce RTX 4090 Max-Q is a notebook one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
