AMD Radeon RX 640 Mobile vs NVIDIA GeForce 840M

VS

AMD Radeon RX 640 Mobile NVIDIA GeForce 840M

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 2GB VRAM GeForce 840M 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 Clock has increased by 8% (1218MHz vs 1124MHz)

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

256 additional rendering cores

NVIDIA GeForce 840M 's Advantages

Lower TDP (33W vs 50W)

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile +80%

1.559 TFLOPS

GeForce 840M

0.863 TFLOPS

Radeon RX 640 Mobile

VS

GeForce 840M

Graphics Card

May 2019

Release Date

Mar 2014

Mobility Radeon

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1082 MHz

Base Clock

1029 MHz

1218 MHz

Boost Clock

1124 MHz

1500 MHz

Memory Clock

1001 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

64bit

48.00GB/s

Bandwidth

16.02GB/s

Render Config

-

SM Count

-

10

Compute Units

-

640

Shading Units

384

40

TMUs

16

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SMM)

512 KB

L2 Cache

1024 KB

Theoretical Performance

19.49 GPixel/s

Pixel Rate

8.992 GPixel/s

48.72 GTexel/s

Texture Rate

17.98 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

863.2 GFLOPS

97.44 GFLOPS

FP64 (double)

26.98 GFLOPS

Graphics Processor

Polaris 23

GPU Name

GM108

Polaris 23 XT

GPU Variant

N15S-GT

GCN 4.0

Architecture

Maxwell

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

Unknown

103 mm²

Die Size

Unknown

Board Design

50W

TDP

33W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2

Vulkan

1.3

-

CUDA

5.0

6.4

Shader Model

5.1

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