AMD Radeon HD 6770M Mac Edition vs AMD Radeon Pro 555X

VS

AMD Radeon HD 6770M Mac Edition

AMD Radeon Pro 555X

We compared two Mobile platform GPUs: 512MB VRAM Radeon HD 6770M Mac Edition and 4GB VRAM Radeon Pro 555X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770M Mac Edition 's Advantages

Lower TDP (35W vs 75W)

AMD Radeon Pro 555X 's Advantages

Released 7 years and 6 months late

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (94.08GB/s vs 57.60GB/s)

288 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6770M Mac Edition

0.696 TFLOPS

Radeon Pro 555X +100%

1.393 TFLOPS

Radeon HD 6770M Mac Edition

VS

Radeon Pro 555X

Graphics Card

Jan 2011

Release Date

Jul 2018

Vancouver

Generation

Radeon Pro Mac

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

900 MHz

Memory Clock

1470 MHz

Memory

512MB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

57.60GB/s

Bandwidth

94.08GB/s

Render Config

6

Compute Units

12

-

480

Shading Units

768

24

TMUs

48

8

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

5.800 GPixel/s

Pixel Rate

14.51 GPixel/s

17.40 GTexel/s

Texture Rate

43.54 GTexel/s

-

FP16 (half)

1393 GFLOPS

696.0 GFLOPS

FP32 (float)

1393 GFLOPS

-

FP64 (double)

87.07 GFLOPS

Board Design

35W

TDP

75W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Whistler

GPU Name

Polaris 21

Whistler XT (216-0810001)

GPU Variant

Polaris 21 PRO

TeraScale 2

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

40 nm

Process Size

14 nm

0.716 billion

Transistors

3 billion

104 mm²

Die Size

123 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.2

-

5.0

Shader Model

6.4

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