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AMD Radeon HD 7870M
- Graphics Processor
- Heathrow
- Cores
- 640
- TMUs
- 40
- ROPs
- 16
- Memory Size
- 2 GB
- Memory Type
- GDDR5
- Bus Width
- 128 bit
GPU
Recommended Gaming Resolutions:
- 1366x768
- 1600x900
- 1920x1080
The Radeon HD 7870M was a mobile graphics chip by AMD, launched on April 24th, 2012. Built on the 28 nm process, and based on the Heathrow graphics processor, in its Heathrow XT variant, the chip supports DirectX 12. Even though it supports DirectX 12, the feature level is only 11_1, which can be problematic with newer DirectX 12 titles. The Heathrow graphics processor is an average sized chip with a die area of 123 mm² and 1,500 million transistors. It features 640 shading units, 40 texture mapping units, and 16 ROPs. AMD has paired 2,048 MB GDDR5 memory with the Radeon HD 7870M, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 800 MHz, memory is running at 1000 MHz (4 Gbps effective).
Its power draw is rated at 45 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Rather it is intended for use in laptop/notebooks and will use the output of the host mobile device. Radeon HD 7870M is connected to the rest of the system using a PCI-Express 3.0 x16 interface.
Its power draw is rated at 45 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Rather it is intended for use in laptop/notebooks and will use the output of the host mobile device. Radeon HD 7870M is connected to the rest of the system using a PCI-Express 3.0 x16 interface.
Graphics Processor
Mobile Graphics
- Release Date
- Apr 24th, 2012
- Generation
-
London
(HD 7800M)
- Predecessor
- Vancouver
- Successor
- Solar System
- Production
- End-of-life
- Bus Interface
- PCIe 3.0 x16
Relative Performance
Based on TPU review data: "Performance Summary" at 1920x1080, 4K for 2080 Ti and faster.
Performance estimated based on architecture, shader count and clocks.
Clock Speeds
- GPU Clock
- 800 MHz
- Memory Clock
-
1000 MHz
4 Gbps effective
Memory
- Memory Size
- 2 GB
- Memory Type
- GDDR5
- Memory Bus
- 128 bit
- Bandwidth
- 64.00 GB/s
Render Config
- Shading Units
- 640
- TMUs
- 40
- ROPs
- 16
- Compute Units
- 10
- L1 Cache
- 16 KB (per CU)
- L2 Cache
- 256 KB
Theoretical Performance
- Pixel Rate
- 12.80 GPixel/s
- Texture Rate
- 32.00 GTexel/s
- FP32 (float)
- 1,024 GFLOPS
- FP64 (double)
- 64.00 GFLOPS (1:16)
Board Design
- TDP
- 45 W
- Outputs
- Portable Device Dependent
Graphics Features
- DirectX
- 12 (11_1)
- OpenGL
- 4.6
- OpenCL
- 2.1 (1.2)
- Vulkan
- 1.2.170
- Shader Model
- 6.5 (5.1)
Heathrow GPU Notes
| Generation: Southern Islands Desktop Variant: Cape Verde Mobile Variant: Chelsea / Venus / Tropo Graphics/Compute: GFX6 (gfx601) Display Core Engine: 6.0 Unified Video Decoder: 4.0 Video Compression Engine: 1.0 CLRX: GCN 1.0 |
Jan 30th, 2025 00:01 EST
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