Radeon RX 7900 XTX vs HD 6990
Aggregated performance score
RX 7900 XTX outperforms HD 6990 by a whopping 927% based on our aggregated benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 488 | 7 |
| Place by popularity | not in top-100 | 54 |
| Cost-effectiveness evaluation | 1.58 | 27.70 |
| Architecture | TeraScale 3 (2010−2013) | RDNA 3 |
| GPU code name | Antilles | Navi 31 XTX |
| Market segment | Desktop | Desktop |
| Release date | 8 March 2011 (13 years ago) | 3 November 2022 (1 year ago) |
| Launch price (MSRP) | $699 | $999 |
| Current price | $144 (0.2x MSRP) | $859 (0.9x MSRP) |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
RX 7900 XTX has 1653% better value for money than HD 6990.
Detailed specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 1536 | 6144 |
| Core clock speed | 830 MHz | no data |
| Boost clock speed | no data | 2270 MHz |
| Number of transistors | 2,640 million | 57,700 million |
| Manufacturing process technology | 40 nm | 5 nm |
| Power consumption (TDP) | 375 Watt | 355 Watt |
| Texture fill rate | 79.68 | 959.6 |
| Floating-point performance | 2x 2,549.8 gflops | no data |
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 | 287 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 2x 8-pin | 2x 8-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 | GDDR6 |
| Maximum RAM amount | 2 GB | 24 GB |
| Memory bus width | 256 Bit | 384 Bit |
| Memory clock speed | 5000 MHz | 20000 MHz |
| Memory bandwidth | 160.0 GB/s | 960.0 GB/s |
| Shared memory | no data | - |
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 2.1a, 2x DisplayPort 2.1, 1x USB Type-C |
| HDMI | no data | + |
API compatibility
List of supported graphics 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 | 2.1 |
| Vulkan | N/A | 1.3 |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
RX 7900 XTX outperforms HD 6990 by 927% based on our aggregated benchmark results.
Passmark
This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. 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.
Benchmark coverage: 25%
RX 7900 XTX outperforms HD 6990 by 928% in Passmark.
3DMark Fire Strike Graphics
Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.
Benchmark coverage: 14%
RX 7900 XTX outperforms HD 6990 by 1009% in 3DMark Fire Strike Graphics.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Average FPS across all PC games
Here are the average frames per second in a large set of popular games across different resolutions:
| Full HD | 24−27
−950%
| 252
+950%
|
| 1440p | 16−18
−1006%
| 177
+1006%
|
| 4K | 10−12
−1050%
| 115
+1050%
|
Pros & cons summary
| Performance score | 7.79 | 80.01 |
| Recency | 8 March 2011 | 3 November 2022 |
| Cost | $699 | $999 |
| Maximum RAM amount | 2 GB | 24 GB |
| Chip lithography | 40 nm | 5 nm |
| Power consumption (TDP) | 375 Watt | 355 Watt |
The Radeon RX 7900 XTX is our recommended choice as it beats the Radeon HD 6990 in performance tests.
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.
