AMD Radeon R9 M390 Mac Edition vs AMD Radeon HD 6990M

VS

AMD Radeon R9 M390 Mac Edition

AMD Radeon HD 6990M

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 2GB VRAM Radeon HD 6990M 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 3 years and 10 months late

Larger VRAM bandwidth (174.7GB/s vs 115.2GB/s)

Lower TDP (80W vs 100W)

AMD Radeon HD 6990M 's Advantages

96 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 M390 Mac Edition +22%

1.962 TFLOPS

Radeon HD 6990M

1.602 TFLOPS

Radeon R9 M390 Mac Edition

VS

Radeon HD 6990M

Graphics Card

May 2015

Release Date

Jul 2011

Crystal System

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1365 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

174.7GB/s

Bandwidth

115.2GB/s

Render Config

16

Compute Units

14

-

1024

Shading Units

1120

64

TMUs

56

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

30.66 GPixel/s

Pixel Rate

22.88 GPixel/s

61.31 GTexel/s

Texture Rate

40.04 GTexel/s

-

1.962 TFLOPS

FP32 (float)

1.602 TFLOPS

122.6 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

100W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

Blackcomb

Pitcairn PRO (215-0828062)

GPU Variant

Blackcomb XTX (216-0811030)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

1.7 billion

212 mm²

Die Size

212 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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