AMD Radeon R9 M485X vs AMD Radeon HD 6770M Mac Edition

VS

AMD Radeon R9 M485X

AMD Radeon HD 6770M Mac Edition

We compared two Mobile platform GPUs: 8GB VRAM Radeon R9 M485X 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 R9 M485X 's Advantages

Released 5 years and 4 months late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 57.60GB/s)

1568 additional rendering cores

AMD Radeon HD 6770M Mac Edition 's Advantages

Lower TDP (35W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M485X +325%

2.961 TFLOPS

Radeon HD 6770M Mac Edition

0.696 TFLOPS

Radeon R9 M485X

VS

Radeon HD 6770M Mac Edition

Graphics Card

May 2016

Release Date

Jan 2011

Crystal System

Generation

Vancouver

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-A (3.0)

Clock Speeds

-

1250 MHz

Memory Clock

900 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

160.0GB/s

Bandwidth

57.60GB/s

Render Config

32

Compute Units

6

-

2048

Shading Units

480

128

TMUs

24

32

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

5.800 GPixel/s

92.54 GTexel/s

Texture Rate

17.40 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

696.0 GFLOPS

185.1 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

35W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

Whistler

Amethyst XT

GPU Variant

Whistler XT (216-0810001)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

0.716 billion

366 mm²

Die Size

104 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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