AMD Radeon HD 6990M vs AMD Radeon R7 M340

VS

AMD Radeon HD 6990M

AMD Radeon R7 M340

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 6990M and 1024MB VRAM Radeon R7 M340 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990M 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (115.2GB/s vs 16.00GB/s)

736 additional rendering cores

AMD Radeon R7 M340 's Advantages

Released 4 years and 5 months late

Boost Clock715MHz

Score

Benchmark

FP32 (float)

Radeon HD 6990M +191%

1.602 TFLOPS

Radeon R7 M340

0.549 TFLOPS

Radeon HD 6990M

VS

Radeon R7 M340

Graphics Card

Jul 2011

Release Date

Dec 2015

Vancouver

Generation

Gem System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

620 MHz

-

Boost Clock

715 MHz

900 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

115.2GB/s

Bandwidth

16.00GB/s

Render Config

14

Compute Units

6

-

1120

Shading Units

384

56

TMUs

24

32

ROPs

8

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

22.88 GPixel/s

Pixel Rate

5.720 GPixel/s

40.04 GTexel/s

Texture Rate

17.16 GTexel/s

-

1.602 TFLOPS

FP32 (float)

549.1 GFLOPS

-

FP64 (double)

34.32 GFLOPS

Board Design

100W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

None

Graphics Processor

Blackcomb

GPU Name

Opal

Blackcomb XTX (216-0811030)

GPU Variant

Opal PRO

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

0.95 billion

212 mm²

Die Size

77 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

2.1 (1.2)

N/A

Vulkan

1.2.170

-

5.0

Shader Model

6.5 (5.1)

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