AMD Radeon Pro 555X vs NVIDIA GeForce 840M

VS

AMD Radeon Pro 555X

NVIDIA GeForce 840M

We compared two Mobile platform GPUs: 4GB VRAM Radeon Pro 555X and 2GB VRAM GeForce 840M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Pro 555X 's Advantages

Released 4 years and 4 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (94.08GB/s vs 16.02GB/s)

384 additional rendering cores

NVIDIA GeForce 840M 's Advantages

Boost Clock1124MHz

Lower TDP (33W vs 75W)

Score

Benchmark

FP32 (float)

Radeon Pro 555X +61%

1.393 TFLOPS

GeForce 840M

0.863 TFLOPS

Radeon Pro 555X

VS

GeForce 840M

Graphics Card

Jul 2018

Release Date

Mar 2014

Radeon Pro Mac

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1029 MHz

-

Boost Clock

1124 MHz

1470 MHz

Memory Clock

1001 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

64bit

94.08GB/s

Bandwidth

16.02GB/s

Render Config

12

Compute Units

-

768

Shading Units

384

48

TMUs

16

ROPs

8

-

16 KB (per CU)

L1 Cache

64 KB (per SMM)

1024 KB

L2 Cache

1024 KB

-

Theoretical Performance

14.51 GPixel/s

Pixel Rate

8.992 GPixel/s

43.54 GTexel/s

Texture Rate

17.98 GTexel/s

1393 GFLOPS

FP16 (half)

-

1393 GFLOPS

FP32 (float)

863.2 GFLOPS

87.07 GFLOPS

FP64 (double)

26.98 GFLOPS

Board Design

75W

TDP

33W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Polaris 21

GPU Name

GM108

Polaris 21 PRO

GPU Variant

N15S-GT

GCN 4.0

Architecture

Maxwell

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

3 billion

Transistors

Unknown

123 mm²

Die Size

Unknown

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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