NVIDIA GeForce 840A vs AMD Radeon R5 A255

VS

NVIDIA GeForce 840A

AMD Radeon R5 A255

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 1024MB VRAM Radeon R5 A255 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Boost Clock has increased by 20% (1124MHz vs 940MHz)

More VRAM (2GB vs 1024GB)

AMD Radeon R5 A255 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 16.02GB/s)

Score

Benchmark

FP32 (float)

GeForce 840A +19%

0.863 TFLOPS

Radeon R5 A255

0.721 TFLOPS

GeForce 840A

VS

Radeon R5 A255

Graphics Card

Mar 2014

Release Date

Jan 2014

GeForce 800A

Generation

All-In-One

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1029 MHz

Base Clock

925 MHz

1124 MHz

Boost Clock

940 MHz

1001 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

64.00GB/s

Render Config

-

Compute Units

6

-

384

Shading Units

384

16

TMUs

24

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

7.520 GPixel/s

17.98 GTexel/s

Texture Rate

22.56 GTexel/s

-

863.2 GFLOPS

FP32 (float)

721.9 GFLOPS

26.98 GFLOPS

FP64 (double)

-

Board Design

33W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

-

Graphics Processor

GM108

GPU Name

Topaz

-

GPU Variant

Topaz PRO (216-0858030)

Maxwell

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

1.55 billion

Unknown

Die Size

125 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.3

Vulkan

1.2.170

5.0

CUDA

-

5.1

Shader Model

6.5

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