AMD Radeon HD 6990M Rebrand vs AMD Radeon HD 7850M

VS

AMD Radeon HD 6990M Rebrand

AMD Radeon HD 7850M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6990M Rebrand and 2GB VRAM Radeon HD 7850M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990M Rebrand 's Advantages

Larger VRAM bandwidth (70.40GB/s vs 64.00GB/s)

160 additional rendering cores

AMD Radeon HD 7850M 's Advantages

Released 9 months late

More VRAM (2GB vs 1024GB)

Lower TDP (40W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M Rebrand +48%

1.28 TFLOPS

Radeon HD 7850M

0.864 TFLOPS

Radeon HD 6990M Rebrand

VS

Radeon HD 7850M

Graphics Card

Jul 2011

Release Date

Apr 2012

Vancouver

Generation

London

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1100 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

70.40GB/s

Bandwidth

64.00GB/s

Render Config

14

Compute Units

10

-

800

Shading Units

640

40

TMUs

40

16

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.80 GPixel/s

Pixel Rate

10.80 GPixel/s

32.00 GTexel/s

Texture Rate

27.00 GTexel/s

-

1280 GFLOPS

FP32 (float)

864.0 GFLOPS

-

FP64 (double)

54.00 GFLOPS

Board Design

100W

TDP

40W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Broadway

GPU Name

Heathrow

Broadway XTX

GPU Variant

Heathrow PRO

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.04 billion

Transistors

1.5 billion

166 mm²

Die Size

123 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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