ATI Mobility Radeon HD 3870 vs NVIDIA GeForce GT 420M

VS

ATI Mobility Radeon HD 3870

NVIDIA GeForce GT 420M

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 512MB VRAM GeForce GT 420M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Larger VRAM bandwidth (54.40GB/s vs 25.60GB/s)

224 additional rendering cores

NVIDIA GeForce GT 420M 's Advantages

Released 2 years and 3 months late

Lower TDP (23W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870 +119%

0.422 TFLOPS

GeForce GT 420M

0.192 TFLOPS

Mobility Radeon HD 3870

VS

GeForce GT 420M

Graphics Card

Jun 2008

Release Date

Sep 2010

M8x

Generation

GeForce 400M

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

512MB

GDDR3

Memory Type

DDR3

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

25.60GB/s

Render Config

4

Compute Units

-

SM Count

2

320

Shading Units

96

16

TMUs

16

ROPs

4

-

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

2.000 GPixel/s

10.56 GTexel/s

Texture Rate

8.000 GTexel/s

-

422.4 GFLOPS

FP32 (float)

192.0 GFLOPS

84.48 GFLOPS

FP64 (double)

16.00 GFLOPS

Board Design

55W

TDP

23W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

GF108

-

GPU Variant

N11P-GE-A1

TeraScale

Architecture

Fermi

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

0.585 billion

192 mm²

Die Size

116 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

4.1

Shader Model

5.1

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