AMD Radeon R9 M390 Mac Edition vs AMD Radeon HD 6770M

VS

AMD Radeon R9 M390 Mac Edition

AMD Radeon HD 6770M

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 1024MB VRAM Radeon HD 6770M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390 Mac Edition 's Advantages

Released 4 years and 4 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (174.7GB/s vs 57.60GB/s)

544 additional rendering cores

AMD Radeon HD 6770M 's Advantages

Lower TDP (35W vs 80W)

Score

Benchmark

FP32 (float)

Radeon R9 M390 Mac Edition +181%

1.962 TFLOPS

Radeon HD 6770M

0.696 TFLOPS

Radeon R9 M390 Mac Edition

VS

Radeon HD 6770M

Graphics Card

May 2015

Release Date

Jan 2011

Crystal System

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-A (3.0)

Clock Speeds

-

1365 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

57.60GB/s

Render Config

16

Compute Units

6

-

1024

Shading Units

480

64

TMUs

24

32

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

30.66 GPixel/s

Pixel Rate

5.800 GPixel/s

61.31 GTexel/s

Texture Rate

17.40 GTexel/s

-

1.962 TFLOPS

FP32 (float)

696.0 GFLOPS

122.6 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

35W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Pitcairn

GPU Name

Whistler

Pitcairn PRO (215-0828062)

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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