AMD Radeon RX 640 Mobile vs NVIDIA GeForce 820M

VS

AMD Radeon RX 640 Mobile

NVIDIA GeForce 820M

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 2GB VRAM GeForce 820M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 640 Mobile 's Advantages

Released 4 years and 2 months late

Boost Clock1218MHz

Larger VRAM bandwidth (48.00GB/s vs 28.83GB/s)

256 additional rendering cores

NVIDIA GeForce 820M 's Advantages

Lower TDP (45W vs 50W)

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile +150%

1.559 TFLOPS

GeForce 820M

0.622 TFLOPS

Radeon RX 640 Mobile

VS

GeForce 820M

Graphics Card

May 2019

Release Date

Mar 2015

Mobility Radeon

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1082 MHz

Base Clock

-

1218 MHz

Boost Clock

-

1500 MHz

Memory Clock

901 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

128bit

48.00GB/s

Bandwidth

28.83GB/s

Render Config

10

Compute Units

-

640

Shading Units

384

40

TMUs

32

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

6.480 GPixel/s

48.72 GTexel/s

Texture Rate

25.92 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

622.1 GFLOPS

97.44 GFLOPS

FP64 (double)

25.92 GFLOPS

Board Design

50W

TDP

45W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Polaris 23

GPU Name

GK107

Polaris 23 XT

GPU Variant

-

GCN 4.0

Architecture

Kepler

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

1.27 billion

103 mm²

Die Size

118 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

6.4

Shader Model

5.1

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