AMD Radeon R9 M390X vs AMD Radeon HD 6490M Mac Edition

VS

AMD Radeon R9 M390X AMD Radeon HD 6490M Mac Edition

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 256MB VRAM Radeon HD 6490M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390X 's Advantages

Released 4 years late

Larger VRAM bandwidth (160.0GB/s vs 25.41GB/s)

1888 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 M390X +1133%

2.961 TFLOPS

Radeon HD 6490M Mac Edition

0.24 TFLOPS

Radeon R9 M390X

VS

Radeon HD 6490M Mac Edition

Graphics Card

May 2015

Release Date

May 2011

Crystal System

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1250 MHz

Memory Clock

794 MHz

Memory

4GB

Memory Size

256MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

160.0GB/s

Bandwidth

25.41GB/s

Render Config

-

SM Count

-

32

Compute Units

2

2048

Shading Units

160

128

TMUs

8

32

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

128 KB

Theoretical Performance

23.14 GPixel/s

Pixel Rate

3.000 GPixel/s

92.54 GTexel/s

Texture Rate

6.000 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

240.0 GFLOPS

185.1 GFLOPS

FP64 (double)

-

Graphics Processor

Amethyst

GPU Name

Seymour

Amethyst XT

GPU Variant

Seymour XTX M2 (216-0809000)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

0.37 billion

366 mm²

Die Size

67 mm²

Board Design

75W

TDP

Unknown

-

Suggested PSU

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

6.3

Shader Model

5.0

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