AMD Radeon HD 6990M vs AMD Radeon R9 M295X Mac Edition

VS

AMD Radeon HD 6990M

AMD Radeon R9 M295X Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 6990M and 4GB VRAM Radeon R9 M295X Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990M 's Advantages

Lower TDP (100W vs 250W)

AMD Radeon R9 M295X Mac Edition 's Advantages

Released 3 years and 4 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (174.3GB/s vs 115.2GB/s)

928 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6990M

1.602 TFLOPS

Radeon R9 M295X Mac Edition +117%

3.482 TFLOPS

Radeon HD 6990M

VS

Radeon R9 M295X Mac Edition

Graphics Card

Jul 2011

Release Date

Nov 2014

Vancouver

Generation

Crystal System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

900 MHz

Memory Clock

1362 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

174.3GB/s

Render Config

14

Compute Units

32

-

1120

Shading Units

2048

56

TMUs

128

32

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

22.88 GPixel/s

Pixel Rate

27.20 GPixel/s

40.04 GTexel/s

Texture Rate

108.8 GTexel/s

-

FP16 (half)

3.482 TFLOPS

1.602 TFLOPS

FP32 (float)

3.482 TFLOPS

-

FP64 (double)

217.6 GFLOPS

Board Design

100W

TDP

250W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Blackcomb

GPU Name

Amethyst

Blackcomb XTX (216-0811030)

GPU Variant

Amethyst XT

TeraScale 2

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

5 billion

212 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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