GeForce GTX 660M Mac Edition vs Radeon RX 6900 XT
Aggregated performance score
Radeon RX 6900 XT outperforms GeForce GTX 660M Mac Edition by a whopping 4350% based on our aggregated benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 18 | 923 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 21.32 | 0.04 |
| Architecture | Navi / RDNA2 (2020−2022) | Kepler (2012−2018) |
| GPU code name | Navi 21 | GK107 |
| Market segment | Desktop | Desktop |
| Release date | 8 December 2020 (3 years ago) | 1 April 2013 (11 years ago) |
| Launch price (MSRP) | $999 | no data |
| Current price | $957 (1x MSRP) | $149 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
RX 6900 XT has 53200% better value for money than GTX 660M Mac Edition.
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 | 5120 | 384 |
| Core clock speed | 1825 MHz | 950 MHz |
| Boost clock speed | 2250 MHz | no data |
| Number of transistors | 26,800 million | 1,270 million |
| Manufacturing process technology | 7 nm | 28 nm |
| Power consumption (TDP) | 300 Watt | 50 Watt |
| Texture fill rate | 720.0 | 30.40 |
| Floating-point performance | no data | 729.6 gflops |
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 | MXM-B (3.0) |
| Length | 267 mm | no data |
| Width | 3-slot | MXM Module |
| 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 | GDDR6 | GDDR5 |
| Maximum RAM amount | 16 GB | 512 MB |
| Memory bus width | 256 Bit | 128 Bit |
| Memory clock speed | 16000 MHz | 5000 MHz |
| Memory bandwidth | 512.0 GB/s | 80 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 HDMI, 2x DisplayPort, 1x USB Type-C | No outputs |
| HDMI | + | no data |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 12 (11_0) |
| Shader Model | 6.5 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | 1.1.126 |
| CUDA | no data | 3.0 |
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 | 193
+4725%
| 4−5
−4725%
|
| 1440p | 134
+4367%
| 3−4
−4367%
|
| 4K | 83
+8200%
| 1−2
−8200%
|
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 130−140
+4433%
|
3−4
−4433%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 117
+5750%
|
2−3
−5750%
|
| Assassin's Creed Valhalla | 169
+5533%
|
3−4
−5533%
|
| Battlefield 5 | 195
+4775%
|
4−5
−4775%
|
| Call of Duty: Modern Warfare | 170−180
+5667%
|
3−4
−5667%
|
| Cyberpunk 2077 | 130−140
+4433%
|
3−4
−4433%
|
| Far Cry 5 | 150−160
+5167%
|
3−4
−5167%
|
| Far Cry New Dawn | 126
+6200%
|
2−3
−6200%
|
| Forza Horizon 4 | 283
+4617%
|
6−7
−4617%
|
| Hitman 3 | 283
+4617%
|
6−7
−4617%
|
| Horizon Zero Dawn | 205
+5025%
|
4−5
−5025%
|
| Red Dead Redemption 2 | 196
+4800%
|
4−5
−4800%
|
| Shadow of the Tomb Raider | 222
+5450%
|
4−5
−5450%
|
| Watch Dogs: Legion | 190
+4650%
|
4−5
−4650%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 106
+5200%
|
2−3
−5200%
|
| Assassin's Creed Valhalla | 142
+4633%
|
3−4
−4633%
|
| Battlefield 5 | 196
+4800%
|
4−5
−4800%
|
| Call of Duty: Modern Warfare | 170−180
+5667%
|
3−4
−5667%
|
| Cyberpunk 2077 | 130−140
+4433%
|
3−4
−4433%
|
| Far Cry 5 | 150−160
+5167%
|
3−4
−5167%
|
| Far Cry New Dawn | 123
+6050%
|
2−3
−6050%
|
| Forza Horizon 4 | 279
+4550%
|
6−7
−4550%
|
| Hitman 3 | 276
+4500%
|
6−7
−4500%
|
| Horizon Zero Dawn | 174
+5700%
|
3−4
−5700%
|
| Metro Exodus | 164
+5367%
|
3−4
−5367%
|
| Red Dead Redemption 2 | 124
+6100%
|
2−3
−6100%
|
| Shadow of the Tomb Raider | 207
+5075%
|
4−5
−5075%
|
| The Witcher 3: Wild Hunt | 323
+4514%
|
7−8
−4514%
|
| Watch Dogs: Legion | 170
+5567%
|
3−4
−5567%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 98
+4800%
|
2−3
−4800%
|
| Assassin's Creed Valhalla | 137
+4467%
|
3−4
−4467%
|
| Battlefield 5 | 197
+4825%
|
4−5
−4825%
|
| Cyberpunk 2077 | 130−140
+4433%
|
3−4
−4433%
|
| Far Cry 5 | 150−160
+5167%
|
3−4
−5167%
|
| Far Cry New Dawn | 118
+5800%
|
2−3
−5800%
|
| Forza Horizon 4 | 248
+4860%
|
5−6
−4860%
|
| The Witcher 3: Wild Hunt | 164
+5367%
|
3−4
−5367%
|
| Watch Dogs: Legion | 121
+5950%
|
2−3
−5950%
|
1440p
High Preset
| Call of Duty: Modern Warfare | 120−130
+6200%
|
2−3
−6200%
|
| Hitman 3 | 213
+5225%
|
4−5
−5225%
|
| Horizon Zero Dawn | 136
+4433%
|
3−4
−4433%
|
| Metro Exodus | 102
+5000%
|
2−3
−5000%
|
| Red Dead Redemption 2 | 82
+8100%
|
1−2
−8100%
|
| Shadow of the Tomb Raider | 159
+5200%
|
3−4
−5200%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 99
+4850%
|
2−3
−4850%
|
| Assassin's Creed Valhalla | 109
+5350%
|
2−3
−5350%
|
| Battlefield 5 | 196
+4800%
|
4−5
−4800%
|
| Cyberpunk 2077 | 70−75
+7300%
|
1−2
−7300%
|
| Far Cry 5 | 130−140
+4367%
|
3−4
−4367%
|
| Far Cry New Dawn | 117
+5750%
|
2−3
−5750%
|
| Forza Horizon 4 | 231
+4520%
|
5−6
−4520%
|
| The Witcher 3: Wild Hunt | 120−130
+6300%
|
2−3
−6300%
|
| Watch Dogs: Legion | 91
+4450%
|
2−3
−4450%
|
4K
High Preset
| Call of Duty: Modern Warfare | 75−80
+7700%
|
1−2
−7700%
|
| Hitman 3 | 128
+6300%
|
2−3
−6300%
|
| Horizon Zero Dawn | 38 | 0−1 |
| Metro Exodus | 67
+6600%
|
1−2
−6600%
|
| Red Dead Redemption 2 | 55
+5400%
|
1−2
−5400%
|
| Shadow of the Tomb Raider | 85
+8400%
|
1−2
−8400%
|
| The Witcher 3: Wild Hunt | 122
+6000%
|
2−3
−6000%
|
4K
Ultra Preset
| Assassin's Creed Odyssey | 68
+6700%
|
1−2
−6700%
|
| Assassin's Creed Valhalla | 66
+6500%
|
1−2
−6500%
|
| Battlefield 5 | 134
+4367%
|
3−4
−4367%
|
| Cyberpunk 2077 | 35−40 | 0−1 |
| Far Cry 5 | 80−85
+8100%
|
1−2
−8100%
|
| Far Cry New Dawn | 101
+4950%
|
2−3
−4950%
|
| Forza Horizon 4 | 162
+5300%
|
3−4
−5300%
|
| Watch Dogs: Legion | 54
+5300%
|
1−2
−5300%
|
This is how RX 6900 XT and GTX 660M Mac Edition compete in popular games:
- RX 6900 XT is 4725% faster in 1080p
- RX 6900 XT is 4367% faster in 1440p
- RX 6900 XT is 8200% faster in 4K
Pros & cons summary
| Performance score | 69.42 | 1.56 |
| Recency | 8 December 2020 | 1 April 2013 |
| Maximum RAM amount | 16 GB | 512 MB |
| Chip lithography | 7 nm | 28 nm |
| Power consumption (TDP) | 300 Watt | 50 Watt |
The Radeon RX 6900 XT is our recommended choice as it beats the GeForce GTX 660M Mac Edition 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.
