GeForce GT 645M vs GTX 660
Aggregate performance score
We've compared GeForce GTX 660 with GeForce GT 645M, including specs and performance data.
GTX 660 outperforms GT 645M by a whopping 329% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 437 | 838 |
| Place by popularity | 58 | not in top-100 |
| Cost-effectiveness evaluation | 3.28 | no data |
| Power efficiency | 5.16 | 5.27 |
| Architecture | Kepler (2012−2018) | Kepler (2012−2018) |
| GPU code name | GK106 | GK107 |
| Market segment | Desktop | Laptop |
| Release date | 6 September 2012 (12 years ago) | 1 October 2012 (12 years ago) |
| Launch price (MSRP) | $229 | 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 | 960 | 384 |
| Core clock speed | 980 MHz | Up to 710 MHz |
| Boost clock speed | 1033 MHz | no data |
| Number of transistors | 2,540 million | 1,270 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 140 Watt | 32 Watt |
| Texture fill rate | 82.56 | 22.69 |
| Floating-point processing power | 1.981 TFLOPS | 0.5445 TFLOPS |
| ROPs | 24 | 16 |
| TMUs | 80 | 32 |
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).
| Laptop size | no data | medium sized |
| Bus support | PCI Express 3.0 | PCI Express 2.0, PCI Express 3.0 |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Length | 241 mm | no data |
| Height | 4.376" (11.1 cm) | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | 1x 6-pin | no data |
| SLI options | + | - |
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 | DDR3\GDDR5 |
| Maximum RAM amount | 2 GB | 2 GB |
| Memory bus width | 192-bit GDDR5 | 128bit |
| Memory clock speed | 6.0 GB/s | 900 MHz |
| Memory bandwidth | 144.2 GB/s | Up to 64.0 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 | One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort | No outputs |
| Multi monitor support | 4 displays | no data |
| HDMI | + | + |
| HDCP | + | + |
| Maximum VGA resolution | 2048x1536 | Up to 2048x1536 |
| Audio input for HDMI | Internal | no data |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| 3D Blu-Ray | + | + |
| 3D Gaming | + | - |
| 3D Vision | + | - |
| Optimus | - | + |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 API |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.3 | 4.5 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | 1.1.126 |
| CUDA | + | + |
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.
GeekBench 5 OpenCL
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.
Octane Render OctaneBench
This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.
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:
| 900p | 120−130
+300%
| 30
−300%
|
| Full HD | 47
+104%
| 23
−104%
|
Cost per frame, $
| 1080p | 4.87 | no data |
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 5−6
+0%
|
5−6
+0%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 8−9
+0%
|
8−9
+0%
|
| Battlefield 5 | 3−4
+0%
|
3−4
+0%
|
| Call of Duty: Modern Warfare | 6−7
+0%
|
6−7
+0%
|
| Cyberpunk 2077 | 5−6
+0%
|
5−6
+0%
|
| Far Cry 5 | 4−5
+0%
|
4−5
+0%
|
| Far Cry New Dawn | 6−7
+0%
|
6−7
+0%
|
| Forza Horizon 4 | 10−12
+0%
|
10−12
+0%
|
| Hitman 3 | 7−8
+0%
|
7−8
+0%
|
| Horizon Zero Dawn | 20−22
+0%
|
20−22
+0%
|
| Metro Exodus | 1−2
+0%
|
1−2
+0%
|
| Red Dead Redemption 2 | 5−6
+0%
|
5−6
+0%
|
| Shadow of the Tomb Raider | 10−12
+0%
|
10−12
+0%
|
| Watch Dogs: Legion | 35−40
+0%
|
35−40
+0%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 8−9
+0%
|
8−9
+0%
|
| Battlefield 5 | 3−4
+0%
|
3−4
+0%
|
| Call of Duty: Modern Warfare | 6−7
+0%
|
6−7
+0%
|
| Cyberpunk 2077 | 5−6
+0%
|
5−6
+0%
|
| Far Cry 5 | 4−5
+0%
|
4−5
+0%
|
| Far Cry New Dawn | 6−7
+0%
|
6−7
+0%
|
| Forza Horizon 4 | 10−12
+0%
|
10−12
+0%
|
| Hitman 3 | 7−8
+0%
|
7−8
+0%
|
| Horizon Zero Dawn | 20−22
+0%
|
20−22
+0%
|
| Metro Exodus | 1−2
+0%
|
1−2
+0%
|
| Red Dead Redemption 2 | 5−6
+0%
|
5−6
+0%
|
| Shadow of the Tomb Raider | 10−12
+0%
|
10−12
+0%
|
| The Witcher 3: Wild Hunt | 12−14
+0%
|
12−14
+0%
|
| Watch Dogs: Legion | 35−40
+0%
|
35−40
+0%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 8−9
+0%
|
8−9
+0%
|
| Call of Duty: Modern Warfare | 6−7
+0%
|
6−7
+0%
|
| Cyberpunk 2077 | 5−6
+0%
|
5−6
+0%
|
| Far Cry 5 | 4−5
+0%
|
4−5
+0%
|
| Forza Horizon 4 | 10−12
+0%
|
10−12
+0%
|
| Hitman 3 | 7−8
+0%
|
7−8
+0%
|
| Horizon Zero Dawn | 20−22
+0%
|
20−22
+0%
|
| Shadow of the Tomb Raider | 10−12
+0%
|
10−12
+0%
|
| The Witcher 3: Wild Hunt | 12−14
+0%
|
12−14
+0%
|
| Watch Dogs: Legion | 35−40
+0%
|
35−40
+0%
|
Full HD
Epic Preset
| Red Dead Redemption 2 | 5−6
+0%
|
5−6
+0%
|
1440p
High Preset
| Battlefield 5 | 4−5
+0%
|
4−5
+0%
|
| Far Cry New Dawn | 4−5
+0%
|
4−5
+0%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 2−3
+0%
|
2−3
+0%
|
| Call of Duty: Modern Warfare | 1−2
+0%
|
1−2
+0%
|
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Far Cry 5 | 3−4
+0%
|
3−4
+0%
|
| Hitman 3 | 7−8
+0%
|
7−8
+0%
|
| Horizon Zero Dawn | 6−7
+0%
|
6−7
+0%
|
| The Witcher 3: Wild Hunt | 2−3
+0%
|
2−3
+0%
|
| Watch Dogs: Legion | 14−16
+0%
|
14−16
+0%
|
1440p
Epic Preset
| Red Dead Redemption 2 | 5−6
+0%
|
5−6
+0%
|
4K
High Preset
| Battlefield 5 | 0−1 | 0−1 |
| Far Cry New Dawn | 1−2
+0%
|
1−2
+0%
|
4K
Ultra Preset
| Assassin's Creed Odyssey | 2−3
+0%
|
2−3
+0%
|
| Assassin's Creed Valhalla | 1−2
+0%
|
1−2
+0%
|
| Call of Duty: Modern Warfare | 1−2
+0%
|
1−2
+0%
|
| Far Cry 5 | 1−2
+0%
|
1−2
+0%
|
| Watch Dogs: Legion | 0−1 | 0−1 |
4K
Epic Preset
| Red Dead Redemption 2 | 3−4
+0%
|
3−4
+0%
|
This is how GTX 660 and GT 645M compete in popular games:
- GTX 660 is 300% faster in 900p
- GTX 660 is 104% faster in 1080p
All in all, in popular games:
- there's a draw in 56 tests (100%)
Pros & cons summary
| Performance score | 10.37 | 2.42 |
| Power consumption (TDP) | 140 Watt | 32 Watt |
GTX 660 has a 328.5% higher aggregate performance score.
GT 645M, on the other hand, has 337.5% lower power consumption.
The GeForce GTX 660 is our recommended choice as it beats the GeForce GT 645M in performance tests.
Be aware that GeForce GTX 660 is a desktop card while GeForce GT 645M is a notebook one.
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.
