Radeon RX 6900 XT vs HD 6990
Aggregate performance score
We've compared Radeon HD 6990 and Radeon RX 6900 XT, covering specs and all relevant benchmarks.
RX 6900 XT outperforms HD 6990 by a whopping 787% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 524 | 23 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.63 | 29.52 |
| Power efficiency | 1.44 | 16.00 |
| Architecture | TeraScale 3 (2010−2013) | RDNA 2.0 (2020−2024) |
| GPU code name | Antilles | Navi 21 |
| Market segment | Desktop | Desktop |
| Release date | 8 March 2011 (13 years ago) | 28 October 2020 (4 years ago) |
| Launch price (MSRP) | $699 | $999 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
RX 6900 XT has 4586% 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 | 5120 |
| Core clock speed | 830 MHz | 1825 MHz |
| Boost clock speed | no data | 2250 MHz |
| Number of transistors | 2,640 million | 26,800 million |
| Manufacturing process technology | 40 nm | 7 nm |
| Power consumption (TDP) | 375 Watt | 300 Watt |
| Texture fill rate | 79.68 | 720.0 |
| Floating-point processing power | 2.55 TFLOPS | 23.04 TFLOPS |
| ROPs | 32 | 128 |
| TMUs | 96 | 320 |
| Ray Tracing Cores | no data | 80 |
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 | 267 mm |
| Width | 2-slot | 3-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 | 16 GB |
| Memory bus width | 256 Bit | 256 Bit |
| Memory clock speed | 1250 MHz | 2000 MHz |
| Memory bandwidth | 160.0 GB/s | 512.0 GB/s |
| Shared memory | - | - |
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, 2x DisplayPort, 1x USB Type-C |
| HDMI | - | + |
API 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 | 6.5 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | N/A | 1.2 |
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. 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.
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.
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.
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 | 21−24
−795%
| 188
+795%
|
| 1440p | 14−16
−829%
| 130
+829%
|
| 4K | 9−10
−800%
| 81
+800%
|
Cost per frame, $
| 1080p | 33.29
−526%
| 5.31
+526%
|
| 1440p | 49.93
−550%
| 7.68
+550%
|
| 4K | 77.67
−530%
| 12.33
+530%
|
- RX 6900 XT has 526% lower cost per frame in 1080p
- RX 6900 XT has 550% lower cost per frame in 1440p
- RX 6900 XT has 530% lower cost per frame in 4K
FPS performance in popular games
Full HD
Low Preset
| Counter-Strike 2 | 160−170
+0%
|
160−170
+0%
|
| Cyberpunk 2077 | 160−170
+0%
|
160−170
+0%
|
| Elden Ring | 260−270
+0%
|
260−270
+0%
|
Full HD
Medium Preset
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Counter-Strike 2 | 160−170
+0%
|
160−170
+0%
|
| Cyberpunk 2077 | 76
+0%
|
76
+0%
|
| Forza Horizon 4 | 350−400
+0%
|
350−400
+0%
|
| Metro Exodus | 126
+0%
|
126
+0%
|
| Red Dead Redemption 2 | 120−130
+0%
|
120−130
+0%
|
| Valorant | 480
+0%
|
480
+0%
|
Full HD
High Preset
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Counter-Strike 2 | 160−170
+0%
|
160−170
+0%
|
| Cyberpunk 2077 | 64
+0%
|
64
+0%
|
| Dota 2 | 160−170
+0%
|
160−170
+0%
|
| Elden Ring | 260−270
+0%
|
260−270
+0%
|
| Far Cry 5 | 130−140
+0%
|
130−140
+0%
|
| Fortnite | 270−280
+0%
|
270−280
+0%
|
| Forza Horizon 4 | 350−400
+0%
|
350−400
+0%
|
| Grand Theft Auto V | 160−170
+0%
|
160−170
+0%
|
| Metro Exodus | 123
+0%
|
123
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 210−220
+0%
|
210−220
+0%
|
| Red Dead Redemption 2 | 124
+0%
|
124
+0%
|
| The Witcher 3: Wild Hunt | 170−180
+0%
|
170−180
+0%
|
| Valorant | 300−350
+0%
|
300−350
+0%
|
| World of Tanks | 270−280
+0%
|
270−280
+0%
|
Full HD
Ultra Preset
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Counter-Strike 2 | 160−170
+0%
|
160−170
+0%
|
| Cyberpunk 2077 | 53
+0%
|
53
+0%
|
| Dota 2 | 160−170
+0%
|
160−170
+0%
|
| Far Cry 5 | 130−140
+0%
|
130−140
+0%
|
| Forza Horizon 4 | 350−400
+0%
|
350−400
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 210−220
+0%
|
210−220
+0%
|
| Valorant | 411
+0%
|
411
+0%
|
1440p
High Preset
| Dota 2 | 130−140
+0%
|
130−140
+0%
|
| Elden Ring | 180−190
+0%
|
180−190
+0%
|
| Grand Theft Auto V | 130−140
+0%
|
130−140
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 170−180
+0%
|
170−180
+0%
|
| Red Dead Redemption 2 | 82
+0%
|
82
+0%
|
| World of Tanks | 450−500
+0%
|
450−500
+0%
|
1440p
Ultra Preset
| Battlefield 5 | 85−90
+0%
|
85−90
+0%
|
| Counter-Strike 2 | 90−95
+0%
|
90−95
+0%
|
| Cyberpunk 2077 | 36
+0%
|
36
+0%
|
| Far Cry 5 | 160−170
+0%
|
160−170
+0%
|
| Forza Horizon 4 | 250−260
+0%
|
250−260
+0%
|
| Metro Exodus | 117
+0%
|
117
+0%
|
| The Witcher 3: Wild Hunt | 150−160
+0%
|
150−160
+0%
|
| Valorant | 328
+0%
|
328
+0%
|
4K
High Preset
| Counter-Strike 2 | 85−90
+0%
|
85−90
+0%
|
| Dota 2 | 150−160
+0%
|
150−160
+0%
|
| Elden Ring | 95−100
+0%
|
95−100
+0%
|
| Grand Theft Auto V | 150−160
+0%
|
150−160
+0%
|
| Metro Exodus | 67
+0%
|
67
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 200−210
+0%
|
200−210
+0%
|
| Red Dead Redemption 2 | 55
+0%
|
55
+0%
|
| The Witcher 3: Wild Hunt | 150−160
+0%
|
150−160
+0%
|
4K
Ultra Preset
| Battlefield 5 | 90−95
+0%
|
90−95
+0%
|
| Counter-Strike 2 | 85−90
+0%
|
85−90
+0%
|
| Cyberpunk 2077 | 17
+0%
|
17
+0%
|
| Dota 2 | 150−160
+0%
|
150−160
+0%
|
| Far Cry 5 | 100−110
+0%
|
100−110
+0%
|
| Fortnite | 95−100
+0%
|
95−100
+0%
|
| Forza Horizon 4 | 130−140
+0%
|
130−140
+0%
|
| Valorant | 185
+0%
|
185
+0%
|
This is how HD 6990 and RX 6900 XT compete in popular games:
- RX 6900 XT is 795% faster in 1080p
- RX 6900 XT is 829% faster in 1440p
- RX 6900 XT is 800% faster in 4K
All in all, in popular games:
- there's a draw in 63 tests (100%)
Pros & cons summary
| Performance score | 7.84 | 69.55 |
| Recency | 8 March 2011 | 28 October 2020 |
| Maximum RAM amount | 2 GB | 16 GB |
| Chip lithography | 40 nm | 7 nm |
| Power consumption (TDP) | 375 Watt | 300 Watt |
RX 6900 XT has a 787.1% higher aggregate performance score, an age advantage of 9 years, a 700% higher maximum VRAM amount, a 471.4% more advanced lithography process, and 25% lower power consumption.
The Radeon RX 6900 XT 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.
Other comparisons
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