GeForce RTX 4090 D vs Radeon HD 6990
Aggregate performance score
We've compared Radeon HD 6990 and GeForce RTX 4090 D, covering specs and all relevant benchmarks.
RTX 4090 D outperforms HD 6990 by a whopping 852% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 531 | 15 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.64 | 14.08 |
| Power efficiency | 1.43 | 12.03 |
| Architecture | TeraScale 3 (2010−2013) | Ada Lovelace (2022−2024) |
| GPU code name | Antilles | AD102 |
| Market segment | Desktop | Desktop |
| Release date | 8 March 2011 (13 years ago) | 28 December 2023 (1 year ago) |
| Launch price (MSRP) | $699 | $1,599 |
Cost-effectiveness evaluation
The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.
RTX 4090 D has 2100% better value for money than HD 6990.
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 | 1536 ×2 | 14592 |
| Core clock speed | 830 MHz | 2280 MHz |
| Boost clock speed | no data | 2520 MHz |
| Number of transistors | 2,640 million | 76,300 million |
| Manufacturing process technology | 40 nm | 5 nm |
| Power consumption (TDP) | 375 Watt | 425 Watt |
| Texture fill rate | 79.68 ×2 | 1,149 |
| Floating-point processing power | 2.55 TFLOPS ×2 | 73.54 TFLOPS |
| ROPs | 32 ×2 | 176 |
| TMUs | 96 ×2 | 456 |
| Tensor Cores | no data | 456 |
| Ray Tracing Cores | no data | 114 |
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 2.0 x16 | PCIe 4.0 x16 |
| Length | 295 mm | 304 mm |
| Width | 2-slot | 3-slot |
| Supplementary power connectors | 2x 8-pin | 1x 16-pin |
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 | GDDR5 | GDDR6X |
| Maximum RAM amount | 2 GB ×2 | 24 GB |
| Memory bus width | 256 Bit ×2 | 384 Bit |
| Memory clock speed | 1250 MHz | 1313 MHz |
| Memory bandwidth | 160.0 GB/s ×2 | 1,008 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 DVI, 4x mini-DisplayPort | 1x HDMI 2.1, 3x DisplayPort 1.4a |
| HDMI | - | + |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12 Ultimate (12_2) |
| Shader Model | 5.0 | 6.7 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | N/A | 1.3 |
| CUDA | - | 8.9 |
| DLSS | - | + |
Synthetic benchmark performance
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 7.82 | 74.45 |
| Recency | 8 March 2011 | 28 December 2023 |
| Maximum RAM amount | 2 GB | 24 GB |
| Chip lithography | 40 nm | 5 nm |
| Power consumption (TDP) | 375 Watt | 425 Watt |
HD 6990 has 13.3% lower power consumption.
RTX 4090 D, on the other hand, has a 852% higher aggregate performance score, an age advantage of 12 years, a 1100% higher maximum VRAM amount, and a 700% more advanced lithography process.
The GeForce RTX 4090 D is our recommended choice as it beats the Radeon HD 6990 in performance tests.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
