Radeon 660M vs HD 6990
Aggregate performance score
We've compared Radeon HD 6990 and Radeon 660M, covering specs and all relevant benchmarks.
660M outperforms HD 6990 by a whopping 109% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 517 | 326 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.60 | no data |
| Power efficiency | 1.44 | 28.20 |
| Architecture | TeraScale 3 (2010−2013) | RDNA 2.0 (2020−2024) |
| GPU code name | Antilles | Rembrandt+ |
| Market segment | Desktop | Desktop |
| Release date | 8 March 2011 (13 years ago) | 3 January 2023 (1 year ago) |
| Launch price (MSRP) | $699 | no data |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
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 | 384 |
| Core clock speed | 830 MHz | 1500 MHz |
| Boost clock speed | no data | 1900 MHz |
| Number of transistors | 2,640 million | 13,100 million |
| Manufacturing process technology | 40 nm | 6 nm |
| Power consumption (TDP) | 375 Watt | 40 Watt |
| Texture fill rate | 79.68 | 45.60 |
| Floating-point processing power | 2.55 TFLOPS | 1.459 TFLOPS |
| ROPs | 32 | 16 |
| TMUs | 96 | 24 |
| Ray Tracing Cores | no data | 6 |
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 x8 |
| Length | 295 mm | no data |
| Width | 2-slot | IGP |
| Supplementary power connectors | 2x 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 | GDDR5 | System Shared |
| Maximum RAM amount | 2 GB | System Shared |
| Memory bus width | 256 Bit | System Shared |
| Memory clock speed | 1250 MHz | System Shared |
| Memory bandwidth | 160.0 GB/s | no data |
| 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 | Portable Device Dependent |
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 | 6.7 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | N/A | 1.3 |
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 | 10−12
−150%
| 25
+150%
|
Cost per frame, $
| 1080p | 69.90 | no data |
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 24
+0%
|
24
+0%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 21−24
+0%
|
21−24
+0%
|
| Assassin's Creed Valhalla | 26
+0%
|
26
+0%
|
| Battlefield 5 | 30−33
+0%
|
30−33
+0%
|
| Call of Duty: Modern Warfare | 20−22
+0%
|
20−22
+0%
|
| Cyberpunk 2077 | 20
+0%
|
20
+0%
|
| Far Cry 5 | 21−24
+0%
|
21−24
+0%
|
| Far Cry New Dawn | 27−30
+0%
|
27−30
+0%
|
| Forza Horizon 4 | 65−70
+0%
|
65−70
+0%
|
| Hitman 3 | 21
+0%
|
21
+0%
|
| Horizon Zero Dawn | 50−55
+0%
|
50−55
+0%
|
| Metro Exodus | 30−35
+0%
|
30−35
+0%
|
| Red Dead Redemption 2 | 27−30
+0%
|
27−30
+0%
|
| Shadow of the Tomb Raider | 30−35
+0%
|
30−35
+0%
|
| Watch Dogs: Legion | 60−65
+0%
|
60−65
+0%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 21−24
+0%
|
21−24
+0%
|
| Assassin's Creed Valhalla | 19
+0%
|
19
+0%
|
| Battlefield 5 | 30−33
+0%
|
30−33
+0%
|
| Call of Duty: Modern Warfare | 20−22
+0%
|
20−22
+0%
|
| Cyberpunk 2077 | 14
+0%
|
14
+0%
|
| Far Cry 5 | 21−24
+0%
|
21−24
+0%
|
| Far Cry New Dawn | 27−30
+0%
|
27−30
+0%
|
| Forza Horizon 4 | 65−70
+0%
|
65−70
+0%
|
| Hitman 3 | 21
+0%
|
21
+0%
|
| Horizon Zero Dawn | 50−55
+0%
|
50−55
+0%
|
| Metro Exodus | 30−35
+0%
|
30−35
+0%
|
| Red Dead Redemption 2 | 27−30
+0%
|
27−30
+0%
|
| Shadow of the Tomb Raider | 33
+0%
|
33
+0%
|
| The Witcher 3: Wild Hunt | 24−27
+0%
|
24−27
+0%
|
| Watch Dogs: Legion | 60−65
+0%
|
60−65
+0%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 21−24
+0%
|
21−24
+0%
|
| Assassin's Creed Valhalla | 14−16
+0%
|
14−16
+0%
|
| Call of Duty: Modern Warfare | 20−22
+0%
|
20−22
+0%
|
| Cyberpunk 2077 | 14−16
+0%
|
14−16
+0%
|
| Far Cry 5 | 21−24
+0%
|
21−24
+0%
|
| Forza Horizon 4 | 65−70
+0%
|
65−70
+0%
|
| Hitman 3 | 18−20
+0%
|
18−20
+0%
|
| Horizon Zero Dawn | 22
+0%
|
22
+0%
|
| Shadow of the Tomb Raider | 27
+0%
|
27
+0%
|
| The Witcher 3: Wild Hunt | 15
+0%
|
15
+0%
|
| Watch Dogs: Legion | 60−65
+0%
|
60−65
+0%
|
Full HD
Epic Preset
| Red Dead Redemption 2 | 27−30
+0%
|
27−30
+0%
|
1440p
High Preset
| Battlefield 5 | 18−20
+0%
|
18−20
+0%
|
| Far Cry New Dawn | 14−16
+0%
|
14−16
+0%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 10−11
+0%
|
10−11
+0%
|
| Assassin's Creed Valhalla | 6−7
+0%
|
6−7
+0%
|
| Call of Duty: Modern Warfare | 10−11
+0%
|
10−11
+0%
|
| Cyberpunk 2077 | 5−6
+0%
|
5−6
+0%
|
| Far Cry 5 | 10−12
+0%
|
10−12
+0%
|
| Forza Horizon 4 | 40−45
+0%
|
40−45
+0%
|
| Hitman 3 | 12−14
+0%
|
12−14
+0%
|
| Horizon Zero Dawn | 20−22
+0%
|
20−22
+0%
|
| Metro Exodus | 14−16
+0%
|
14−16
+0%
|
| Shadow of the Tomb Raider | 12−14
+0%
|
12−14
+0%
|
| The Witcher 3: Wild Hunt | 9−10
+0%
|
9−10
+0%
|
| Watch Dogs: Legion | 60−65
+0%
|
60−65
+0%
|
1440p
Epic Preset
| Red Dead Redemption 2 | 16−18
+0%
|
16−18
+0%
|
4K
High Preset
| Battlefield 5 | 9−10
+0%
|
9−10
+0%
|
| Far Cry New Dawn | 7−8
+0%
|
7−8
+0%
|
| Hitman 3 | 6−7
+0%
|
6−7
+0%
|
| Horizon Zero Dawn | 40−45
+0%
|
40−45
+0%
|
| Metro Exodus | 8−9
+0%
|
8−9
+0%
|
| The Witcher 3: Wild Hunt | 7−8
+0%
|
7−8
+0%
|
4K
Ultra Preset
| Assassin's Creed Odyssey | 6−7
+0%
|
6−7
+0%
|
| Assassin's Creed Valhalla | 4−5
+0%
|
4−5
+0%
|
| Call of Duty: Modern Warfare | 4−5
+0%
|
4−5
+0%
|
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Far Cry 5 | 5−6
+0%
|
5−6
+0%
|
| Forza Horizon 4 | 12−14
+0%
|
12−14
+0%
|
| Shadow of the Tomb Raider | 6−7
+0%
|
6−7
+0%
|
| Watch Dogs: Legion | 3−4
+0%
|
3−4
+0%
|
4K
Epic Preset
| Red Dead Redemption 2 | 9−10
+0%
|
9−10
+0%
|
This is how HD 6990 and Radeon 660M compete in popular games:
- Radeon 660M is 150% faster in 1080p
All in all, in popular games:
- there's a draw in 72 tests (100%)
Pros & cons summary
| Performance score | 7.81 | 16.29 |
| Recency | 8 March 2011 | 3 January 2023 |
| Chip lithography | 40 nm | 6 nm |
| Power consumption (TDP) | 375 Watt | 40 Watt |
Radeon 660M has a 108.6% higher aggregate performance score, an age advantage of 11 years, a 566.7% more advanced lithography process, and 837.5% lower power consumption.
The Radeon 660M 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.
