ATI Mobility Radeon HD 4850 X2 vs ATI Mobility Radeon HD 3850

VS

ATI Mobility Radeon HD 4850 X2

ATI Mobility Radeon HD 3850

We compared two Mobile platform GPUs: 1024MB VRAM Mobility Radeon HD 4850 X2 and 512MB VRAM Mobility Radeon HD 3850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 4850 X2 's Advantages

Released 7 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (89.60GB/s vs 48.00GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 4850 X2 +115%

0.8 TFLOPS

Mobility Radeon HD 3850

0.371 TFLOPS

Mobility Radeon HD 4850 X2

VS

Mobility Radeon HD 3850

Graphics Card

Jan 2009

Release Date

Jun 2008

M9x

Generation

M8x

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

700 MHz

Memory Clock

750 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

89.60GB/s

Bandwidth

48.00GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

16

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

256 KB

-

Theoretical Performance

8.000 GPixel/s

Pixel Rate

9.280 GPixel/s

20.00 GTexel/s

Texture Rate

9.280 GTexel/s

-

800.0 GFLOPS

FP32 (float)

371.2 GFLOPS

160.0 GFLOPS

FP64 (double)

74.24 GFLOPS

Board Design

Unknown

TDP

35W

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

M98

GPU Name

M88

M98 L2 (216-0732019)

GPU Variant

-

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.956 billion

Transistors

0.666 billion

256 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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