ATI Mobility Radeon HD 3870: GPU Specs & Benchmarks

The Mobility Radeon HD 3870 is a graphics card by ATI, built on the 55 nm process and based on the M88 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.

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Graphics Processor (GPU)

GPU Name
M88
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
666 million
Die Size
192 mm²

Graphics Card

Release Date
Jun 4th, 2008
Family
M8x
(Mobility HD 3800)
Production
End-of-life
Predecessor
M7x
Bus Interface
PCIe 2.0 x16

Memory

Memory Size
512 MB
Memory Type
GDDR3
Memory Bus
256 bit
Bandwidth
54.40 GB/s

Performance

Pixel fillrate
10.56 GPixel/s
Texture fillrate
10.56 GTexel/s
FP32 (float) performance
422.4 GFLOPS
FP64 (double) performance
84.48 GFLOPS (1:5)

Clock Speeds

Memory Clock
850 MHz
1700 Mbps effective
GPU Clock
660 MHz

Render Config

Shading Units
320
TMUs
16
ROPs
16
Compute Units
4
L2 Cache
256 KB

Board Design

Thermal design power (TDP)
55 W
Display Connectors
No outputs

API support

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
N/A
Vulkan
N/A
Shader Model
4.1
Mobility Radeon HD 3870
ATI Mobility Radeon HD 3870: GPU Specs & Benchmarks