AMD Radeon RX 640 Mobile vs NVIDIA GeForce 820A

VS

AMD Radeon RX 640 Mobile

NVIDIA GeForce 820A

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 1024MB VRAM GeForce 820A 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 5 years and 2 months late

Boost Clock1218MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (48.00GB/s vs 14.40GB/s)

544 additional rendering cores

NVIDIA GeForce 820A 's Advantages

Lower TDP (15W vs 50W)

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile +423%

1.559 TFLOPS

GeForce 820A

0.298 TFLOPS

Radeon RX 640 Mobile

VS

GeForce 820A

Graphics Card

May 2019

Release Date

Mar 2014

Mobility Radeon

Generation

GeForce 800A

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1082 MHz

Base Clock

-

1218 MHz

Boost Clock

-

1500 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

64bit

48.00GB/s

Bandwidth

14.40GB/s

Render Config

10

Compute Units

-

SM Count

2

640

Shading Units

96

40

TMUs

16

ROPs

8

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

3.100 GPixel/s

48.72 GTexel/s

Texture Rate

12.40 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

297.6 GFLOPS

97.44 GFLOPS

FP64 (double)

24.80 GFLOPS

Board Design

50W

TDP

15W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Polaris 23

GPU Name

GF117

Polaris 23 XT

GPU Variant

N15V-GM

GCN 4.0

Architecture

Fermi 2.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

0.585 billion

103 mm²

Die Size

116 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.4

Shader Model

5.1

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