NVIDIA GeForce 840M vs AMD Radeon RX 640 Mobile

VS

NVIDIA GeForce 840M

AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 2GB VRAM Radeon RX 640 Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840M 's Advantages

Lower TDP (33W vs 50W)

AMD Radeon RX 640 Mobile 's Advantages

Released 5 years and 2 months late

Boost Clock has increased by 8% (1218MHz vs 1124MHz)

Larger VRAM bandwidth (48.00GB/s vs 16.02GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840M

0.863 TFLOPS

Radeon RX 640 Mobile +80%

1.559 TFLOPS

GeForce 840M

VS

Radeon RX 640 Mobile

Graphics Card

Mar 2014

Release Date

May 2019

GeForce 800M

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1029 MHz

Base Clock

1082 MHz

1124 MHz

Boost Clock

1218 MHz

1001 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

64bit

16.02GB/s

Bandwidth

48.00GB/s

Render Config

-

Compute Units

10

-

384

Shading Units

640

16

TMUs

40

8

ROPs

16

-

64 KB (per SMM)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

19.49 GPixel/s

17.98 GTexel/s

Texture Rate

48.72 GTexel/s

-

FP16 (half)

1.559 TFLOPS

863.2 GFLOPS

FP32 (float)

1.559 TFLOPS

26.98 GFLOPS

FP64 (double)

97.44 GFLOPS

Board Design

33W

TDP

50W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

GM108

GPU Name

Polaris 23

N15S-GT

GPU Variant

Polaris 23 XT

Maxwell

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

Unknown

Transistors

2.2 billion

Unknown

Die Size

103 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.3

Vulkan

1.2

5.0

CUDA

-

5.1

Shader Model

6.4

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