ATI Mobility Radeon HD 3850 X2 vs AMD Radeon HD 6990M Rebrand

VS

ATI Mobility Radeon HD 3850 X2

AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3850 X2 and 1024MB VRAM Radeon HD 6990M Rebrand 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

Lower TDP (70W vs 100W)

AMD Radeon HD 6990M Rebrand 's Advantages

Released 3 years and 1 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (70.40GB/s vs 48.00GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3850 X2

0.371 TFLOPS

Radeon HD 6990M Rebrand +245%

1.28 TFLOPS

Mobility Radeon HD 3850 X2

VS

Radeon HD 6990M Rebrand

Graphics Card

Jun 2008

Release Date

Jul 2011

M8x

Generation

Vancouver

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

750 MHz

Memory Clock

1100 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

128bit

48.00GB/s

Bandwidth

70.40GB/s

Render Config

4

Compute Units

14

-

320

Shading Units

800

16

TMUs

40

16

ROPs

16

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

9.280 GPixel/s

Pixel Rate

12.80 GPixel/s

9.280 GTexel/s

Texture Rate

32.00 GTexel/s

-

371.2 GFLOPS

FP32 (float)

1280 GFLOPS

74.24 GFLOPS

FP64 (double)

-

Board Design

70W

TDP

100W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

Broadway

-

GPU Variant

Broadway XTX

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

1.04 billion

192 mm²

Die Size

166 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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