AMD Radeon R9 M395X Mac Edition vs NVIDIA GeForce GT 640M LE

VS

AMD Radeon R9 M395X Mac Edition

NVIDIA GeForce GT 640M LE

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 2GB VRAM GeForce GT 640M LE 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 3 years late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (174.7GB/s vs 50.24GB/s)

1952 additional rendering cores

NVIDIA GeForce GT 640M LE 's Advantages

Lower TDP (32W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M395X Mac Edition +1188%

3.723 TFLOPS

GeForce GT 640M LE

0.289 TFLOPS

Radeon R9 M395X Mac Edition

VS

GeForce GT 640M LE

Graphics Card

May 2015

Release Date

May 2012

Crystal System

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1365 MHz

Memory Clock

785 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

50.24GB/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

3.012 GPixel/s

116.4 GTexel/s

Texture Rate

12.05 GTexel/s

3.723 TFLOPS

FP16 (half)

-

3.723 TFLOPS

FP32 (float)

289.0 GFLOPS

232.7 GFLOPS

FP64 (double)

24.08 GFLOPS

Board Design

250W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

GF108

Amethyst XT

GPU Variant

-

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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