AMD Radeon R9 M395X Mac Edition vs NVIDIA GeForce GT 420M

VS

AMD Radeon R9 M395X Mac Edition

NVIDIA GeForce GT 420M

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition 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 R9 M395X Mac Edition 's Advantages

Released 4 years and 8 months late

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (174.7GB/s vs 25.60GB/s)

1952 additional rendering cores

NVIDIA GeForce GT 420M 's Advantages

Lower TDP (23W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M395X Mac Edition +1839%

3.723 TFLOPS

GeForce GT 420M

0.192 TFLOPS

Radeon R9 M395X Mac Edition

VS

GeForce GT 420M

Graphics Card

May 2015

Release Date

Sep 2010

Crystal System

Generation

GeForce 400M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1365 MHz

Memory Clock

800 MHz

Memory

4GB

Memory Size

512MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

25.60GB/s

Render Config

32

Compute Units

-

SM Count

2

2048

Shading Units

96

128

TMUs

16

32

ROPs

4

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

29.09 GPixel/s

Pixel Rate

2.000 GPixel/s

116.4 GTexel/s

Texture Rate

8.000 GTexel/s

3.723 TFLOPS

FP16 (half)

-

3.723 TFLOPS

FP32 (float)

192.0 GFLOPS

232.7 GFLOPS

FP64 (double)

16.00 GFLOPS

Board Design

250W

TDP

23W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

GF108

Amethyst XT

GPU Variant

N11P-GE-A1

GCN 3.0

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

0.585 billion

366 mm²

Die Size

116 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.3

Shader Model

5.1

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