NVIDIA GeForce GT 620M vs AMD Radeon R9 M390X

VS

NVIDIA GeForce GT 620M AMD Radeon R9 M390X

We compared two Mobile platform GPUs: 1024MB VRAM GeForce GT 620M and 4GB VRAM Radeon R9 M390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 620M 's Advantages

Lower TDP (15W vs 75W)

AMD Radeon R9 M390X 's Advantages

Released 2 years and 9 months late

More VRAM (4GB vs 1GB)

Larger VRAM bandwidth (160.0GB/s vs 28.80GB/s)

1952 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 620M

0.253 TFLOPS

Radeon R9 M390X +1070%

2.961 TFLOPS

GeForce GT 620M

VS

Radeon R9 M390X

Graphics Card

Aug 2012

Release Date

May 2015

GeForce 600M

Generation

Crystal System

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

4GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.80GB/s

Bandwidth

160.0GB/s

Render Config

2

SM Count

-

Compute Units

32

96

Shading Units

2048

16

TMUs

128

4

ROPs

32

-

Tensor Cores

-

RT Cores

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

2.640 GPixel/s

Pixel Rate

23.14 GPixel/s

10.56 GTexel/s

Texture Rate

92.54 GTexel/s

-

FP16 (half)

2.961 TFLOPS

253.4 GFLOPS

FP32 (float)

2.961 TFLOPS

21.12 GFLOPS

FP64 (double)

185.1 GFLOPS

Graphics Processor

GF108

GPU Name

Amethyst

N13P-GLP-A1

GPU Variant

Amethyst XT

Fermi

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.585 billion

Transistors

5 billion

116 mm²

Die Size

366 mm²

Board Design

15W

TDP

75W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.1

OpenCL

2.0

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

6.3

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