AMD Radeon HD 6870M vs AMD Radeon HD 7770M

VS

AMD Radeon HD 6870M

AMD Radeon HD 7770M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6870M and 1024MB VRAM Radeon HD 7770M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870M 's Advantages

288 additional rendering cores

AMD Radeon HD 7770M 's Advantages

Released 1 years and 3 months late

Lower TDP (32W vs 50W)

Score

Benchmark

FP32 (float)

Radeon HD 6870M +56%

1.08 TFLOPS

Radeon HD 7770M

0.691 TFLOPS

Radeon HD 6870M

VS

Radeon HD 7770M

Graphics Card

Jan 2011

Release Date

Apr 2012

Vancouver

Generation

London

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

64.00GB/s

Render Config

10

Compute Units

8

-

800

Shading Units

512

40

TMUs

32

16

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

10.80 GPixel/s

Pixel Rate

10.80 GPixel/s

27.00 GTexel/s

Texture Rate

21.60 GTexel/s

-

1080 GFLOPS

FP32 (float)

691.2 GFLOPS

-

FP64 (double)

43.20 GFLOPS

Board Design

50W

TDP

32W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Granville

GPU Name

Chelsea

Granville XT (216-0769024)

GPU Variant

Chelsea XT

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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