ATI Mobility HD 3870 vs AMD HD 6755G2

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Combined performance score

HD 6755G2
1.42
+6%

HD 6755G2 outperforms Mobility HD 3870 by 6% in our combined benchmark results.

General info

GPU architecture, market segment, value for money and other general parameters compared.

Place in performance ranking950975
Place by popularitynot in top-100not in top-100
ArchitectureTerascale 2 (2009−2015)RV6xx (2007−2010)
GPU code nameno dataM88-XT
Market segmentLaptopLaptop
Release date14 June 2011 (12 years old)1 March 2008 (16 years old)

Technical specs

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 cores880320
Core clock speedno data660 MHz
Number of transistorsno data666 million
Manufacturing process technology40 nm55 nm
Power consumption (TDP)no data55 Watt
Texture fill rateno data10.56
Floating-point performanceno data422.4 gflops

Size and compatibility

Information on Radeon HD 6755G2 and Mobility Radeon HD 3870 compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. 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 sizemedium sizedlarge
Interfaceno dataPCIe 2.0 x16

Memory

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 typeno dataGDDR3
Maximum RAM amountno data512 MB
Memory bus widthno data256 Bit
Memory clock speedno data850 MHz
Memory bandwidthno data54.4 GB/s
Shared memory--

Video outputs and ports

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 Connectorsno dataNo outputs

API support

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX1110.1 (10_1)
Shader Modelno data4.1
OpenGLno data3.3
OpenCLno dataN/A
Vulkanno dataN/A

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.

HD 6755G2 1.42
+6%
ATI Mobility HD 3870 1.34

HD 6755G2 outperforms Mobility HD 3870 by 6% in our combined benchmark results.


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.

Benchmark coverage: 17%

HD 6755G2 2855
ATI Mobility HD 3870 3458
+21.1%

Mobility HD 3870 outperforms HD 6755G2 by 21% in 3DMark Vantage Performance.

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:

900p20
+11.1%
18−20
−11.1%
Full HD14
+16.7%
12−14
−16.7%

Performance in popular games

Full HD
Low Preset

Cyberpunk 2077 4−5
+0%
4−5
+0%

Full HD
Medium Preset

Assassin's Creed Odyssey 0−1 0−1
Battlefield 5 0−1 0−1
Call of Duty: Modern Warfare 10−11
+11.1%
9−10
−11.1%
Cyberpunk 2077 4−5
+0%
4−5
+0%
Forza Horizon 4 1−2
+0%
1−2
+0%
Hitman 3 2−3
+100%
1−2
−100%
Horizon Zero Dawn 1−2
+0%
1−2
+0%
Red Dead Redemption 2 4−5
+0%
4−5
+0%
Shadow of the Tomb Raider 7−8
+0%
7−8
+0%

Full HD
High Preset

Assassin's Creed Odyssey 0−1 0−1
Battlefield 5 0−1 0−1
Call of Duty: Modern Warfare 10−11
+11.1%
9−10
−11.1%
Cyberpunk 2077 4−5
+0%
4−5
+0%
Forza Horizon 4 1−2
+0%
1−2
+0%
Hitman 3 2−3
+100%
1−2
−100%
Horizon Zero Dawn 1−2
+0%
1−2
+0%
Metro Exodus 2−3
+0%
2−3
+0%
Red Dead Redemption 2 4−5
+0%
4−5
+0%
Shadow of the Tomb Raider 7−8
+0%
7−8
+0%
The Witcher 3: Wild Hunt 4−5
+0%
4−5
+0%

Full HD
Ultra Preset

Assassin's Creed Odyssey 0−1 0−1
Battlefield 5 0−1 0−1
Cyberpunk 2077 4−5
+0%
4−5
+0%
Forza Horizon 4 1−2
+0%
1−2
+0%
The Witcher 3: Wild Hunt 4−5
+0%
4−5
+0%

1440p
High Preset

Call of Duty: Modern Warfare 3−4
+0%
3−4
+0%
Hitman 3 4−5
+0%
4−5
+0%
Horizon Zero Dawn 9−10
+0%
9−10
+0%
Red Dead Redemption 2 0−1 0−1
Shadow of the Tomb Raider 5−6
+0%
5−6
+0%

1440p
Ultra Preset

Cyberpunk 2077 1−2
+0%
1−2
+0%
Far Cry 5 2−3
+0%
2−3
+0%
The Witcher 3: Wild Hunt 2−3
+0%
2−3
+0%

4K
High Preset

Call of Duty: Modern Warfare 2−3
+0%
2−3
+0%
Hitman 3 2−3
+100%
1−2
−100%
Horizon Zero Dawn 8−9
+0%
8−9
+0%
Red Dead Redemption 2 0−1 0−1

4K
Ultra Preset

Assassin's Creed Odyssey 0−1 0−1
Assassin's Creed Valhalla 0−1 0−1
Far Cry 5 3−4
+0%
3−4
+0%
Far Cry New Dawn 5−6
+0%
5−6
+0%

This is how HD 6755G2 and ATI Mobility HD 3870 compete in popular games:

900p resolution:

  • HD 6755G2 is 11.1% faster than ATI Mobility HD 3870

1080p resolution:

  • HD 6755G2 is 16.7% faster than ATI Mobility HD 3870

Here's the range of performance differences observed across popular games:

  • in Hitman 3, with 1080p resolution and the Medium Preset, the HD 6755G2 is 100% faster than the ATI Mobility HD 3870.

All in all, in popular games:

  • HD 6755G2 is ahead in 5 tests (16%)
  • there's a draw in 27 tests (84%)

Advantages and disadvantages


Performance score 1.42 1.34
Recency 14 June 2011 1 March 2008
Chip lithography 40 nm 55 nm

We couldn't decide between Radeon HD 6755G2 and Mobility Radeon HD 3870. The differences in performance seem too small.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

User ratings

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.


AMD Radeon HD 6755G2
Radeon HD 6755G2
ATI Mobility Radeon HD 3870
Mobility Radeon HD 3870

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2.5 2 votes

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2.3 3 votes

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Questions and comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.