NVIDIA GeForce 945M vs NVIDIA GeForce GT 640M Mac Edition

VS

NVIDIA GeForce 945M

NVIDIA GeForce GT 640M Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM GeForce 945M and 512MB VRAM GeForce GT 640M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 945M 's Advantages

Released 3 years and 2 months late

Boost Clock1189MHz

More VRAM (1024GB vs 512GB)

Lower TDP (23W vs 32W)

NVIDIA GeForce GT 640M Mac Edition 's Advantages

Larger VRAM bandwidth (40.00GB/s vs 16.02GB/s)

Score

Benchmark

FP32 (float)

GeForce 945M +59%

0.913 TFLOPS

GeForce GT 640M Mac Edition

0.572 TFLOPS

GeForce 945M

VS

GeForce GT 640M Mac Edition

Graphics Card

Apr 2016

Release Date

Feb 2013

GeForce 900M

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1006 MHz

Base Clock

-

1189 MHz

Boost Clock

-

1001 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

512MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

64bit

16.02GB/s

Bandwidth

40.00GB/s

Render Config

-

384

Shading Units

384

24

TMUs

32

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

128 KB

-

Theoretical Performance

9.512 GPixel/s

Pixel Rate

5.960 GPixel/s

28.54 GTexel/s

Texture Rate

23.84 GTexel/s

-

913.2 GFLOPS

FP32 (float)

572.2 GFLOPS

28.54 GFLOPS

FP64 (double)

23.84 GFLOPS

Board Design

23W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

GM108

GPU Name

GK107

-

GPU Variant

N13P-GS

Maxwell

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

1.27 billion

Unknown

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

5.0

CUDA

3.0

5.1

Shader Model

5.1

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