ATI Mobility Radeon HD 3850 X2 vs ATI Mobility Radeon HD 4870

VS

ATI Mobility Radeon HD 3850 X2

ATI Mobility Radeon HD 4870

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3850 X2 and 512MB VRAM Mobility Radeon HD 4870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 4870 's Advantages

Released 7 months late

Larger VRAM bandwidth (56.83GB/s vs 48.00GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3850 X2

0.371 TFLOPS

Mobility Radeon HD 4870 +137%

0.88 TFLOPS

Mobility Radeon HD 3850 X2

VS

Mobility Radeon HD 4870

Graphics Card

Jun 2008

Release Date

Jan 2009

M8x

Generation

M9x

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

750 MHz

Memory Clock

888 MHz

Memory

512MB

Memory Size

512MB

GDDR3

Memory Type

GDDR3

256bit

Memory Bus

256bit

48.00GB/s

Bandwidth

56.83GB/s

Render Config

4

Compute Units

10

-

320

Shading Units

800

16

TMUs

40

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

9.280 GPixel/s

Pixel Rate

8.800 GPixel/s

9.280 GTexel/s

Texture Rate

22.00 GTexel/s

-

371.2 GFLOPS

FP32 (float)

880.0 GFLOPS

74.24 GFLOPS

FP64 (double)

176.0 GFLOPS

Board Design

70W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

-

Power Connectors

None

Graphics Processor

M88

GPU Name

M98

-

GPU Variant

M98 XT L2 (216-0732023)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.666 billion

Transistors

0.956 billion

192 mm²

Die Size

256 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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