NVIDIA GeForce 405M vs NVIDIA GeForce GT 640M

VS

NVIDIA GeForce 405M NVIDIA GeForce GT 640M

We compared two Mobile platform GPUs: 512MB VRAM GeForce 405M and 2GB VRAM GeForce GT 640M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 405M 's Advantages

Lower TDP (14W vs 32W)

NVIDIA GeForce GT 640M 's Advantages

Released 1 years and 2 months late

Larger VRAM bandwidth (28.80GB/s vs 12.80GB/s)

368 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 405M

0.039 TFLOPS

GeForce GT 640M +1130%

0.48 TFLOPS

GeForce 405M

VS

GeForce GT 640M

Graphics Card

Jan 2011

Release Date

Mar 2012

GeForce 400M

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

800 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

DDR3

64bit

Memory Bus

128bit

12.80GB/s

Bandwidth

28.80GB/s

Render Config

2

SM Count

-

Compute Units

-

16

Shading Units

384

8

TMUs

32

4

ROPs

16

-

Tensor Cores

-

RT Cores

-

L1 Cache

16 KB (per SMX)

32 KB

L2 Cache

256 KB

Theoretical Performance

2.424 GPixel/s

Pixel Rate

5.000 GPixel/s

4.848 GTexel/s

Texture Rate

20.00 GTexel/s

-

FP16 (half)

-

38.78 GFLOPS

FP32 (float)

480.0 GFLOPS

-

FP64 (double)

20.00 GFLOPS

Graphics Processor

GT218

GPU Name

GK107

-

GPU Variant

N13P-GS

Tesla 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.26 billion

Transistors

1.27 billion

57 mm²

Die Size

118 mm²

Board Design

14W

TDP

32W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

11.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

1.2

CUDA

3.0

4.1

Shader Model

5.1

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