AMD Radeon R5 A255 vs NVIDIA GeForce GTX 850A

VS

AMD Radeon R5 A255

NVIDIA GeForce GTX 850A

We compared two Mobile platform GPUs: 1024MB VRAM Radeon R5 A255 and 2GB VRAM GeForce GTX 850A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 A255 's Advantages

Boost Clock has increased by 0% (940MHz vs 936MHz)

Larger VRAM bandwidth (64.00GB/s vs 28.80GB/s)

NVIDIA GeForce GTX 850A 's Advantages

More VRAM (2GB vs 1024GB)

256 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R5 A255

0.721 TFLOPS

GeForce GTX 850A +66%

1.198 TFLOPS

Radeon R5 A255

VS

GeForce GTX 850A

Graphics Card

Jan 2014

Release Date

Mar 2014

All-In-One

Generation

GeForce 800A

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

925 MHz

Base Clock

902 MHz

940 MHz

Boost Clock

936 MHz

1000 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

28.80GB/s

Render Config

6

Compute Units

-

384

Shading Units

640

24

TMUs

40

8

ROPs

16

-

16 KB (per CU)

L1 Cache

64 KB (per SMM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

7.520 GPixel/s

Pixel Rate

14.98 GPixel/s

22.56 GTexel/s

Texture Rate

37.44 GTexel/s

-

721.9 GFLOPS

FP32 (float)

1198 GFLOPS

-

FP64 (double)

37.44 GFLOPS

Board Design

Unknown

TDP

45W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Topaz

GPU Name

GM107

Topaz PRO (216-0858030)

GPU Variant

N15P-GT-A1

GCN 3.0

Architecture

Maxwell

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.55 billion

Transistors

1.87 billion

125 mm²

Die Size

148 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2.170

Vulkan

1.3

-

CUDA

5.0

6.5

Shader Model

5.1

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