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

VS

AMD Radeon HD 6990M Rebrand

ATI Mobility Radeon HD 3850 X2

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6990M Rebrand and 512MB VRAM Mobility Radeon HD 3850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

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

ATI Mobility Radeon HD 3850 X2 's Advantages

Lower TDP (70W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M Rebrand +245%

1.28 TFLOPS

Mobility Radeon HD 3850 X2

0.371 TFLOPS

Radeon HD 6990M Rebrand

VS

Mobility Radeon HD 3850 X2

Graphics Card

Jul 2011

Release Date

Jun 2008

Vancouver

Generation

M8x

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1100 MHz

Memory Clock

750 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

256bit

70.40GB/s

Bandwidth

48.00GB/s

Render Config

14

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

16

-

8 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.80 GPixel/s

Pixel Rate

9.280 GPixel/s

32.00 GTexel/s

Texture Rate

9.280 GTexel/s

-

1280 GFLOPS

FP32 (float)

371.2 GFLOPS

-

FP64 (double)

74.24 GFLOPS

Board Design

100W

TDP

70W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Broadway

GPU Name

M88

Broadway XTX

GPU Variant

-

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.04 billion

Transistors

0.666 billion

166 mm²

Die Size

192 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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