AMD Radeon R7 M340 vs AMD Radeon R5 M255

VS

AMD Radeon R7 M340

AMD Radeon R5 M255

We compared two Mobile platform GPUs: 1024MB VRAM Radeon R7 M340 and 2GB VRAM Radeon R5 M255 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R7 M340 's Advantages

Released 1 years and 2 months late

AMD Radeon R5 M255 's Advantages

Boost Clock has increased by 31% (940MHz vs 715MHz)

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (32.00GB/s vs 16.00GB/s)

Score

Benchmark

FP32 (float)

Radeon R7 M340

0.549 TFLOPS

Radeon R5 M255 +31%

0.721 TFLOPS

Radeon R7 M340

VS

Radeon R5 M255

Graphics Card

Dec 2015

Release Date

Oct 2014

Gem System

Generation

Gem System

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

620 MHz

Base Clock

925 MHz

715 MHz

Boost Clock

940 MHz

1000 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

2GB

DDR3

Memory Type

DDR3

64bit

Memory Bus

128bit

16.00GB/s

Bandwidth

32.00GB/s

Render Config

6

Compute Units

6

-

384

Shading Units

384

24

TMUs

24

8

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

5.720 GPixel/s

Pixel Rate

7.520 GPixel/s

17.16 GTexel/s

Texture Rate

22.56 GTexel/s

-

FP16 (half)

721.9 GFLOPS

549.1 GFLOPS

FP32 (float)

721.9 GFLOPS

34.32 GFLOPS

FP64 (double)

45.12 GFLOPS

Board Design

Unknown

TDP

Unknown

-

Portable Device Dependent

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Opal

GPU Name

Topaz

Opal PRO

GPU Variant

Topaz PRO (216-0858030)

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

0.95 billion

Transistors

1.55 billion

77 mm²

Die Size

125 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1 (1.2)

OpenCL

2.1

1.2.170

Vulkan

1.2.170

-

6.5 (5.1)

Shader Model

6.5

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