ATI Mobility Radeon HD 3870 X2
- Graphics Processor
- M88 x2
- Cores
- 320 x2
- TMUs
- 16 x2
- ROPs
- 16 x2
- Memory Size
- 512 MB x2
- Memory Type
- GDDR3
- Bus Width
- 256 bit x2
Recommended Gaming Resolutions:
- 640x480
- 1280x720
- 1366x768
- 1600x900
- 1920x1080
- 2560x1440
- 3840x2160
The Mobility Radeon HD 3870 X2 was a graphics card by ATI, launched in September 2008. Built on the 55 nm process, and based on the M88 graphics processor, the card supports DirectX 10.1. The M88 graphics processor is an average sized chip with a die area of 192 mm² and 666 million transistors. Mobility Radeon HD 3870 X2 combines two graphics processors to increase performance. It features 320 shading units, 16 texture mapping units and 16 ROPs per GPU. ATI has placed 1,024 MB GDDR3 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 512 MB). The GPU is operating at a frequency of 660 MHz, memory is running at 850 MHz.
Its power draw is rated at 110 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Mobility Radeon HD 3870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface.
Its power draw is rated at 110 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Mobility Radeon HD 3870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface.
Graphics Processor
Mobile Graphics
- Release Date
- Sep 1st, 2008
- Generation
-
M8x
(Mobility HD 3800)
- Production
- End-of-life
- Bus Interface
- PCIe 2.0 x16
- Reviews
- 2 in our database
Relative Performance
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.
Clock Speeds
- GPU Clock
- 660 MHz
- Memory Clock
-
850 MHz
1700 MHz effective
Memory
- Memory Size
- 512 MB
- Memory Type
- GDDR3
- Memory Bus
- 256 bit
- Bandwidth
- 54.40 GB/s
Render Config
- Shading Units
- 320
- TMUs
- 16
- ROPs
- 16
- Compute Units
- 4
- L2 Cache
- 256 KB
Theoretical Performance
- Pixel Rate
- 10.56 GPixel/s
- Texture Rate
- 10.56 GTexel/s
- FP32 (float) performance
- 422.4 GFLOPS
- FP64 (double) performance
- 84.48 GFLOPS (1:5)
Board Design
- TDP
- 110 W
- Outputs
- No outputs
Graphics Features
- DirectX
- 10.1 (10_1)
- OpenGL
- 3.3
- OpenCL
- N/A
- Vulkan
- N/A
- Shader Model
- 4.1
M88 GPU Notes
| Chip Variant: RV670 Codename: Boom Graphics/Compute: GFX3 Display Core Engine: 2.0 Unified Video Decoder: 1.0 |