AMD Radeon HD 8970M vs AMD Radeon HD 6770M Mac Edition

VS

AMD Radeon HD 8970M

AMD Radeon HD 6770M Mac Edition

We compared two Mobile platform GPUs: 4GB VRAM Radeon HD 8970M and 512MB VRAM Radeon HD 6770M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8970M 's Advantages

Released 2 years and 4 months late

Boost Clock900MHz

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (153.6GB/s vs 57.60GB/s)

800 additional rendering cores

AMD Radeon HD 6770M Mac Edition 's Advantages

Lower TDP (35W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 8970M +231%

2.304 TFLOPS

Radeon HD 6770M Mac Edition

0.696 TFLOPS

Radeon HD 8970M

VS

Radeon HD 6770M Mac Edition

Graphics Card

May 2013

Release Date

Jan 2011

Solar System

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-A (3.0)

Clock Speeds

850 MHz

Base Clock

-

900 MHz

Boost Clock

-

1200 MHz

Memory Clock

900 MHz

Memory

4GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

153.6GB/s

Bandwidth

57.60GB/s

Render Config

20

Compute Units

6

-

1280

Shading Units

480

80

TMUs

24

32

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

5.800 GPixel/s

72.00 GTexel/s

Texture Rate

17.40 GTexel/s

-

2.304 TFLOPS

FP32 (float)

696.0 GFLOPS

144.0 GFLOPS

FP64 (double)

-

Board Design

100W

TDP

35W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Neptune

GPU Name

Whistler

Neptune XT (216-0847000)

GPU Variant

Whistler XT (216-0810001)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

0.716 billion

212 mm²

Die Size

104 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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