ATI Mobility Radeon HD 3870 vs NVIDIA GeForce 8400M GT

VS

ATI Mobility Radeon HD 3870

NVIDIA GeForce 8400M GT

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 512MB VRAM GeForce 8400M GT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Released 1 years and 1 months late

Larger VRAM bandwidth (54.40GB/s vs 19.20GB/s)

304 additional rendering cores

NVIDIA GeForce 8400M GT 's Advantages

Lower TDP (14W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870 +1355%

0.422 TFLOPS

GeForce 8400M GT

0.029 TFLOPS

Mobility Radeon HD 3870

VS

GeForce 8400M GT

Graphics Card

Jun 2008

Release Date

May 2007

M8x

Generation

GeForce 8M

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

850 MHz

Memory Clock

600 MHz

Memory

512MB

Memory Size

512MB

GDDR3

Memory Type

GDDR3

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

19.20GB/s

Render Config

4

Compute Units

-

SM Count

2

320

Shading Units

16

TMUs

8

16

ROPs

4

-

256 KB

L2 Cache

32 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

1.800 GPixel/s

10.56 GTexel/s

Texture Rate

3.600 GTexel/s

-

422.4 GFLOPS

FP32 (float)

28.80 GFLOPS

84.48 GFLOPS

FP64 (double)

-

Board Design

55W

TDP

14W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

G86

-

GPU Variant

G86-603-A2

TeraScale

Architecture

Tesla

TSMC

Foundry

TSMC

55 nm

Process Size

80 nm

0.666 billion

Transistors

0.21 billion

192 mm²

Die Size

127 mm²

Graphics Features

10.1 (10_1)

DirectX

11.1 (10_0)

3.3

OpenGL

3.3

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

1.1

4.1

Shader Model

4.0

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