AMD Radeon Pro 555X vs NVIDIA GeForce GT 645M

VS

AMD Radeon Pro 555X

NVIDIA GeForce GT 645M

We compared two Mobile platform GPUs: 4GB VRAM Radeon Pro 555X and 2GB VRAM GeForce GT 645M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Pro 555X 's Advantages

Released 5 years and 9 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (94.08GB/s vs 28.80GB/s)

384 additional rendering cores

NVIDIA GeForce GT 645M 's Advantages

Lower TDP (32W vs 75W)

Score

Benchmark

FP32 (float)

Radeon Pro 555X +156%

1.393 TFLOPS

GeForce GT 645M

0.544 TFLOPS

Radeon Pro 555X

VS

GeForce GT 645M

Graphics Card

Jul 2018

Release Date

Oct 2012

Radeon Pro Mac

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1470 MHz

Memory Clock

900 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

94.08GB/s

Bandwidth

28.80GB/s

Render Config

12

Compute Units

-

768

Shading Units

384

48

TMUs

32

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

14.51 GPixel/s

Pixel Rate

5.672 GPixel/s

43.54 GTexel/s

Texture Rate

22.69 GTexel/s

1393 GFLOPS

FP16 (half)

-

1393 GFLOPS

FP32 (float)

544.5 GFLOPS

87.07 GFLOPS

FP64 (double)

22.69 GFLOPS

Board Design

75W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Polaris 21

GPU Name

GK107

Polaris 21 PRO

GPU Variant

N13P-GS

GCN 4.0

Architecture

Kepler

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

3 billion

Transistors

1.27 billion

123 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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