GeForce GT 645M vs Radeon HD 7660D
Aggregate performance score
We've compared Radeon HD 7660D with GeForce GT 645M, including specs and performance data.
GT 645M outperforms HD 7660D by an impressive 86% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 1000 | 812 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.06 | no data |
| Architecture | Terascale 3 (2010−2013) | Kepler (2012−2018) |
| GPU code name | Trinity | N13P-GS |
| Market segment | Desktop | Laptop |
| Release date | 26 September 2012 (11 years ago) | 22 March 2012 (12 years ago) |
| Launch price (MSRP) | $122 | no data |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
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 | 384 | 384 |
| Core clock speed | 633 MHz | 710 MHz |
| Boost clock speed | 800 MHz | no data |
| Number of transistors | 1,303 million | 1,270 million |
| Manufacturing process technology | 32 nm | 28 nm |
| Power consumption (TDP) | 100 Watt | 32 Watt |
| Texture fill rate | 19.20 | 22.69 |
| Floating-point performance | no data | 544.5 gflops |
Form factor & compatibility
Information on Radeon HD 7660D and GeForce GT 645M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.
| Laptop size | no data | medium sized |
| Interface | IGP | PCIe 3.0 x16 |
| Width | IGP | no data |
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 | no data | DDR3 |
| Maximum RAM amount | System Shared | 2 GB |
| Memory bus width | no data | 128 Bit |
| Memory clock speed | no data | 1800 MHz |
| Memory bandwidth | no data | 28.8 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 | No outputs | No outputs |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| Optimus | no data | + |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12 (11_0) |
| Shader Model | 5.0 | 5.1 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | - | + |
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.
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.
3DMark Vantage Performance
3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.
3DMark 11 Performance GPU
3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.
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.
3DMark Cloud Gate GPU
Cloud Gate is an outdated DirectX 11 feature level 10 benchmark that was used for home PCs and basic notebooks. It displays a few scenes of some weird space teleportation device launching spaceships into unknown, using fixed resolution of 1280x720. Just like Ice Storm benchmark, it has been discontinued in January 2020 and replaced by 3DMark Night Raid.
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 | 16−18
−87.5%
| 30
+87.5%
|
| Full HD | 20
−35%
| 27
+35%
|
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 4−5
−25%
|
5−6
+25%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 6−7
−33.3%
|
8−9
+33.3%
|
| Call of Duty: Modern Warfare | 4−5
−50%
|
6−7
+50%
|
| Cyberpunk 2077 | 4−5
−25%
|
5−6
+25%
|
| Far Cry 5 | 1−2
−300%
|
4−5
+300%
|
| Far Cry New Dawn | 3−4
−100%
|
6−7
+100%
|
| Forza Horizon 4 | 2−3
−450%
|
10−12
+450%
|
| Hitman 3 | 6−7
−16.7%
|
7−8
+16.7%
|
| Horizon Zero Dawn | 14−16
−42.9%
|
20−22
+42.9%
|
| Red Dead Redemption 2 | 2−3
−150%
|
5−6
+150%
|
| Shadow of the Tomb Raider | 8−9
−37.5%
|
10−12
+37.5%
|
| Watch Dogs: Legion | 30−35
−12.1%
|
35−40
+12.1%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 6−7
−33.3%
|
8−9
+33.3%
|
| Call of Duty: Modern Warfare | 4−5
−50%
|
6−7
+50%
|
| Cyberpunk 2077 | 4−5
−25%
|
5−6
+25%
|
| Far Cry 5 | 1−2
−300%
|
4−5
+300%
|
| Far Cry New Dawn | 3−4
−100%
|
6−7
+100%
|
| Forza Horizon 4 | 2−3
−450%
|
10−12
+450%
|
| Hitman 3 | 6−7
−16.7%
|
7−8
+16.7%
|
| Horizon Zero Dawn | 14−16
−42.9%
|
20−22
+42.9%
|
| Red Dead Redemption 2 | 2−3
−150%
|
5−6
+150%
|
| Shadow of the Tomb Raider | 8−9
−37.5%
|
10−12
+37.5%
|
| The Witcher 3: Wild Hunt | 10−12
−18.2%
|
12−14
+18.2%
|
| Watch Dogs: Legion | 30−35
−12.1%
|
35−40
+12.1%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 6−7
−33.3%
|
8−9
+33.3%
|
| Call of Duty: Modern Warfare | 4−5
−50%
|
6−7
+50%
|
| Cyberpunk 2077 | 4−5
−25%
|
5−6
+25%
|
| Far Cry 5 | 1−2
−300%
|
4−5
+300%
|
| Forza Horizon 4 | 2−3
−450%
|
10−12
+450%
|
| Hitman 3 | 6−7
−16.7%
|
7−8
+16.7%
|
| Horizon Zero Dawn | 14−16
−42.9%
|
20−22
+42.9%
|
| Shadow of the Tomb Raider | 8−9
−37.5%
|
10−12
+37.5%
|
| The Witcher 3: Wild Hunt | 10−12
−18.2%
|
12−14
+18.2%
|
| Watch Dogs: Legion | 30−35
−12.1%
|
35−40
+12.1%
|
Full HD
Epic Preset
| Red Dead Redemption 2 | 2−3
−150%
|
5−6
+150%
|
1440p
High Preset
| Battlefield 5 | 1−2
−300%
|
4−5
+300%
|
| Far Cry New Dawn | 2−3
−100%
|
4−5
+100%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 1−2
−100%
|
2−3
+100%
|
| Call of Duty: Modern Warfare | 0−1 | 1−2 |
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Far Cry 5 | 1−2
−200%
|
3−4
+200%
|
| Hitman 3 | 7−8
+0%
|
7−8
+0%
|
| Horizon Zero Dawn | 4−5
−50%
|
6−7
+50%
|
| The Witcher 3: Wild Hunt | 0−1 | 2−3 |
| Watch Dogs: Legion | 6−7
−133%
|
14−16
+133%
|
1440p
Epic Preset
| Red Dead Redemption 2 | 4−5
−25%
|
5−6
+25%
|
4K
High Preset
| Far Cry New Dawn | 0−1 | 1−2 |
4K
Ultra Preset
| Assassin's Creed Odyssey | 1−2
−100%
|
2−3
+100%
|
| Assassin's Creed Valhalla | 1−2
+0%
|
1−2
+0%
|
| Call of Duty: Modern Warfare | 0−1 | 1−2 |
| Far Cry 5 | 0−1 | 1−2 |
4K
Epic Preset
| Red Dead Redemption 2 | 3−4
+0%
|
3−4
+0%
|
Full HD
Medium Preset
| Battlefield 5 | 3−4
+0%
|
3−4
+0%
|
| Metro Exodus | 1−2
+0%
|
1−2
+0%
|
Full HD
High Preset
| Battlefield 5 | 3−4
+0%
|
3−4
+0%
|
| Metro Exodus | 1−2
+0%
|
1−2
+0%
|
4K
High Preset
| Battlefield 5 | 0−1 | 0−1 |
4K
Ultra Preset
| Watch Dogs: Legion | 0−1 | 0−1 |
This is how HD 7660D and GT 645M compete in popular games:
- GT 645M is 88% faster in 900p
- GT 645M is 35% faster in 1080p
Here's the range of performance differences observed across popular games:
- in Forza Horizon 4, with 1080p resolution and the Medium Preset, the GT 645M is 450% faster.
All in all, in popular games:
- GT 645M is ahead in 43 tests (84%)
- there's a draw in 8 tests (16%)
Pros & cons summary
| Performance score | 1.30 | 2.42 |
| Recency | 26 September 2012 | 22 March 2012 |
| Chip lithography | 32 nm | 28 nm |
| Power consumption (TDP) | 100 Watt | 32 Watt |
HD 7660D has an age advantage of 6 months.
GT 645M, on the other hand, has a 86.2% higher aggregate performance score, a 14.3% more advanced lithography process, and 212.5% lower power consumption.
The GeForce GT 645M is our recommended choice as it beats the Radeon HD 7660D in performance tests.
Be aware that Radeon HD 7660D 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.
