AMD Radeon HD 6750M Mac Edition vs AMD Radeon R9 M390X

VS

AMD Radeon HD 6750M Mac Edition

AMD Radeon R9 M390X

We compared two Mobile platform GPUs: 512MB VRAM Radeon HD 6750M Mac Edition and 4GB VRAM Radeon R9 M390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6750M Mac Edition 's Advantages

Lower TDP (35W vs 75W)

AMD Radeon R9 M390X 's Advantages

Released 4 years and 1 months late

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 50.82GB/s)

1568 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6750M Mac Edition

0.574 TFLOPS

Radeon R9 M390X +415%

2.961 TFLOPS

Radeon HD 6750M Mac Edition

VS

Radeon R9 M390X

Graphics Card

Apr 2011

Release Date

May 2015

Vancouver

Generation

Crystal System

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

794 MHz

Memory Clock

1250 MHz

Memory

512MB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

50.82GB/s

Bandwidth

160.0GB/s

Render Config

6

Compute Units

32

-

480

Shading Units

2048

24

TMUs

128

8

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

4.784 GPixel/s

Pixel Rate

23.14 GPixel/s

14.35 GTexel/s

Texture Rate

92.54 GTexel/s

-

FP16 (half)

2.961 TFLOPS

574.1 GFLOPS

FP32 (float)

2.961 TFLOPS

-

FP64 (double)

185.1 GFLOPS

Board Design

35W

TDP

75W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Whistler

GPU Name

Amethyst

Whistler PRO (216-0810005)

GPU Variant

Amethyst XT

TeraScale 2

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.716 billion

Transistors

5 billion

104 mm²

Die Size

366 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.0

N/A

Vulkan

1.2

-

5.0

Shader Model

6.3

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