ATI Mobility Radeon HD 4860 vs ATI Mobility Radeon HD 3870

VS

ATI Mobility Radeon HD 4860

ATI Mobility Radeon HD 3870

We compared two Mobile platform GPUs: 1024MB VRAM Mobility Radeon HD 4860 and 512MB VRAM Mobility Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 4860 's Advantages

Released 9 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (64.00GB/s vs 54.40GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 4860 +97%

0.832 TFLOPS

Mobility Radeon HD 3870

0.422 TFLOPS

Mobility Radeon HD 4860

VS

Mobility Radeon HD 3870

Graphics Card

Mar 2009

Release Date

Jun 2008

M9x

Generation

M8x

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

850 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

256bit

64.00GB/s

Bandwidth

54.40GB/s

Render Config

8

Compute Units

4

-

640

Shading Units

320

32

TMUs

16

ROPs

16

-

16 KB (per CU)

L1 Cache

-

128 KB

L2 Cache

256 KB

-

Theoretical Performance

10.40 GPixel/s

Pixel Rate

10.56 GPixel/s

20.80 GTexel/s

Texture Rate

10.56 GTexel/s

-

832.0 GFLOPS

FP32 (float)

422.4 GFLOPS

166.4 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

Unknown

TDP

55W

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

M97

GPU Name

M88

M97 M2 XT (216-0731000)

GPU Variant

-

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.826 billion

Transistors

0.666 billion

137 mm²

Die Size

192 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

1.1

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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