ATI Mobility Radeon HD 3850 X2 vs ATI Mobility Radeon HD 4650

VS

ATI Mobility Radeon HD 3850 X2

ATI Mobility Radeon HD 4650

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3850 X2 and 512MB VRAM Mobility Radeon HD 4650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3850 X2 's Advantages

Larger VRAM bandwidth (48.00GB/s vs 19.20GB/s)

ATI Mobility Radeon HD 4650 's Advantages

Released 7 months late

Lower TDP (35W vs 70W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3850 X2 +15%

0.371 TFLOPS

Mobility Radeon HD 4650

0.32 TFLOPS

Mobility Radeon HD 3850 X2

VS

Mobility Radeon HD 4650

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

600 MHz

Memory

512MB

Memory Size

512MB

GDDR3

Memory Type

DDR2

256bit

Memory Bus

128bit

48.00GB/s

Bandwidth

19.20GB/s

Render Config

4

Compute Units

4

-

320

Shading Units

320

16

TMUs

32

16

ROPs

8

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

9.280 GPixel/s

Pixel Rate

4.000 GPixel/s

9.280 GTexel/s

Texture Rate

16.00 GTexel/s

-

371.2 GFLOPS

FP32 (float)

320.0 GFLOPS

74.24 GFLOPS

FP64 (double)

-

Board Design

70W

TDP

35W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

M96

-

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.666 billion

Transistors

0.514 billion

192 mm²

Die Size

146 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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