ATI Mobility Radeon HD 3870 X2 vs HD 7870M
Aggregate performance score
We've compared Radeon HD 7870M and Mobility Radeon HD 3870 X2, covering specs and all relevant benchmarks.
HD 7870M outperforms ATI Mobility HD 3870 X2 by an impressive 73% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 715 | 870 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 5.92 | 1.40 |
| Architecture | GCN 1.0 (2011−2020) | TeraScale (2005−2013) |
| GPU code name | Heathrow | M88 |
| Market segment | Laptop | Laptop |
| Release date | 24 April 2012 (12 years ago) | 1 September 2008 (16 years ago) |
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 | 640 | 320 ×2 |
| Core clock speed | 800 MHz | 660 MHz |
| Number of transistors | 1,500 million | 666 million |
| Manufacturing process technology | 28 nm | 55 nm |
| Power consumption (TDP) | 45 Watt | 110 Watt |
| Texture fill rate | 32.00 | 10.56 ×2 |
| Floating-point processing power | 1.024 TFLOPS | 0.4224 TFLOPS ×2 |
| ROPs | 16 | 16 ×2 |
| TMUs | 40 | 16 ×2 |
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 | large | large |
| Interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
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 | GDDR3 |
| Maximum RAM amount | 2 GB | 512 MB ×2 |
| Memory bus width | 128 Bit | 256 Bit ×2 |
| Memory clock speed | 1000 MHz | 850 MHz |
| Memory bandwidth | 64 GB/s | 54.4 GB/s ×2 |
| 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 |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_1) | 10.1 (10_1) |
| Shader Model | 5.1 | 4.1 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | N/A |
| Vulkan | 1.2.131 | N/A |
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.
- 3DMark Vantage Performance
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.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
FPS performance in popular games
- Full HD
Low Preset - Full HD
Medium Preset - Full HD
High Preset - Full HD
Ultra Preset - Full HD
Epic Preset - 1440p
High Preset - 1440p
Ultra Preset - 1440p
Epic Preset - 4K
High Preset - 4K
Ultra Preset - 4K
Epic Preset
| Atomic Heart | 9−10
+50%
|
6−7
−50%
|
| Counter-Strike 2 | 12−14
+333%
|
3−4
−333%
|
| Cyberpunk 2077 | 8−9
+60%
|
5−6
−60%
|
| Atomic Heart | 9−10
+50%
|
6−7
−50%
|
| Battlefield 5 | 14−16
+133%
|
6−7
−133%
|
| Counter-Strike 2 | 12−14
+333%
|
3−4
−333%
|
| Cyberpunk 2077 | 8−9
+60%
|
5−6
−60%
|
| Far Cry 5 | 9−10
+200%
|
3−4
−200%
|
| Fortnite | 20−22
+100%
|
10−11
−100%
|
| Forza Horizon 4 | 16−18
+54.5%
|
10−12
−54.5%
|
| Forza Horizon 5 | 8−9
+300%
|
2−3
−300%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+45.5%
|
10−12
−45.5%
|
| Valorant | 50−55
+30%
|
40−45
−30%
|
| Atomic Heart | 9−10
+50%
|
6−7
−50%
|
| Battlefield 5 | 14−16
+133%
|
6−7
−133%
|
| Counter-Strike 2 | 12−14
+333%
|
3−4
−333%
|
| Counter-Strike: Global Offensive | 65−70
+57.1%
|
40−45
−57.1%
|
| Cyberpunk 2077 | 8−9
+60%
|
5−6
−60%
|
| Dota 2 | 30−35
+43.5%
|
21−24
−43.5%
|
| Far Cry 5 | 9−10
+200%
|
3−4
−200%
|
| Fortnite | 20−22
+100%
|
10−11
−100%
|
| Forza Horizon 4 | 16−18
+54.5%
|
10−12
−54.5%
|
| Forza Horizon 5 | 8−9
+300%
|
2−3
−300%
|
| Grand Theft Auto V | 10−12
+120%
|
5−6
−120%
|
| Metro Exodus | 7−8
+133%
|
3−4
−133%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+45.5%
|
10−12
−45.5%
|
| The Witcher 3: Wild Hunt | 10−12
+57.1%
|
7−8
−57.1%
|
| Valorant | 50−55
+30%
|
40−45
−30%
|
| Battlefield 5 | 14−16
+133%
|
6−7
−133%
|
| Cyberpunk 2077 | 8−9
+60%
|
5−6
−60%
|
| Dota 2 | 30−35
+43.5%
|
21−24
−43.5%
|
| Far Cry 5 | 9−10
+200%
|
3−4
−200%
|
| Forza Horizon 4 | 16−18
+54.5%
|
10−12
−54.5%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+45.5%
|
10−12
−45.5%
|
| The Witcher 3: Wild Hunt | 10−12
+57.1%
|
7−8
−57.1%
|
| Valorant | 50−55
+30%
|
40−45
−30%
|
| Fortnite | 20−22
+100%
|
10−11
−100%
|
| Counter-Strike 2 | 5−6
+150%
|
2−3
−150%
|
| Counter-Strike: Global Offensive | 27−30
+80%
|
14−16
−80%
|
| Grand Theft Auto V | 3−4
+200%
|
1−2
−200%
|
| Metro Exodus | 2−3
+100%
|
1−2
−100%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 27−30
+52.6%
|
18−20
−52.6%
|
| Valorant | 35−40
+124%
|
16−18
−124%
|
| Cyberpunk 2077 | 3−4
+200%
|
1−2
−200%
|
| Far Cry 5 | 6−7
+100%
|
3−4
−100%
|
| Forza Horizon 4 | 9−10
+80%
|
5−6
−80%
|
| The Witcher 3: Wild Hunt | 6−7
+100%
|
3−4
−100%
|
| Fortnite | 7−8
+75%
|
4−5
−75%
|
| Atomic Heart | 3−4
+200%
|
1−2
−200%
|
| Grand Theft Auto V | 16−18
+6.7%
|
14−16
−6.7%
|
| Valorant | 18−20
+63.6%
|
10−12
−63.6%
|
| Cyberpunk 2077 | 1−2 | 0−1 |
| Dota 2 | 10−12
+120%
|
5−6
−120%
|
| Far Cry 5 | 4−5
+100%
|
2−3
−100%
|
| Forza Horizon 4 | 4−5
+300%
|
1−2
−300%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 4−5
+33.3%
|
3−4
−33.3%
|
| Fortnite | 4−5
+33.3%
|
3−4
−33.3%
|
Here's the range of performance differences observed across popular games:
- in Counter-Strike 2, with 1080p resolution and the Low Preset, the HD 7870M is 333% faster.
All in all, in popular games:
- Without exception, HD 7870M surpassed ATI Mobility HD 3870 X2 in all 55 of our tests.
Pros & cons summary
| Performance score | 3.37 | 1.95 |
| Recency | 24 April 2012 | 1 September 2008 |
| Maximum RAM amount | 2 GB | 512 MB |
| Chip lithography | 28 nm | 55 nm |
| Power consumption (TDP) | 45 Watt | 110 Watt |
HD 7870M has a 72.8% higher aggregate performance score, an age advantage of 3 years, a 300% higher maximum VRAM amount, a 96.4% more advanced lithography process, and 144.4% lower power consumption.
The Radeon HD 7870M is our recommended choice as it beats the Mobility Radeon HD 3870 X2 in performance tests.
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