AMD Radeon R5 A255 vs NVIDIA GeForce GT 420M

VS

AMD Radeon R5 A255 NVIDIA GeForce GT 420M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon R5 A255 and 512MB VRAM GeForce GT 420M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 A255 's Advantages

Released 3 years and 4 months late

Boost Clock940MHz

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (64.00GB/s vs 25.60GB/s)

288 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R5 A255 +275%

0.721 TFLOPS

GeForce GT 420M

0.192 TFLOPS

Radeon R5 A255

VS

GeForce GT 420M

Graphics Card

Jan 2014

Release Date

Sep 2010

All-In-One

Generation

GeForce 400M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

940 MHz

Boost Clock

-

1000 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

25.60GB/s

Render Config

-

SM Count

2

6

Compute Units

-

384

Shading Units

96

24

TMUs

16

8

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

Theoretical Performance

7.520 GPixel/s

Pixel Rate

2.000 GPixel/s

22.56 GTexel/s

Texture Rate

8.000 GTexel/s

-

FP16 (half)

-

721.9 GFLOPS

FP32 (float)

192.0 GFLOPS

-

FP64 (double)

16.00 GFLOPS

Graphics Processor

Topaz

GPU Name

GF108

Topaz PRO (216-0858030)

GPU Variant

N11P-GE-A1

GCN 3.0

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.55 billion

Transistors

0.585 billion

125 mm²

Die Size

116 mm²

Board Design

Unknown

TDP

23W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.2.170

Vulkan

N/A

-

CUDA

2.1

6.5

Shader Model

5.1

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