NVIDIA GeForce GT 640M LE vs NVIDIA GeForce 800M

VS

NVIDIA GeForce GT 640M LE NVIDIA GeForce 800M

We compared two Mobile platform GPUs: 2GB VRAM GeForce GT 640M LE and 1024MB VRAM GeForce 800M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640M LE 's Advantages

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (50.24GB/s vs 14.40GB/s)

48 additional rendering cores

NVIDIA GeForce 800M 's Advantages

Released 1 years and 10 months late

Lower TDP (15W vs 32W)

Score

Benchmark

FP32 (float)

GeForce GT 640M LE +103%

0.289 TFLOPS

GeForce 800M

0.142 TFLOPS

GeForce GT 640M LE

VS

GeForce 800M

Graphics Card

May 2012

Release Date

Mar 2014

GeForce 600M

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

785 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

64bit

50.24GB/s

Bandwidth

14.40GB/s

Render Config

2

SM Count

1

-

Compute Units

-

96

Shading Units

48

16

TMUs

8

4

ROPs

8

-

Tensor Cores

-

RT Cores

-

64 KB (per SM)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

128 KB

Theoretical Performance

3.012 GPixel/s

Pixel Rate

1.476 GPixel/s

12.05 GTexel/s

Texture Rate

5.904 GTexel/s

-

FP16 (half)

-

289.0 GFLOPS

FP32 (float)

141.7 GFLOPS

24.08 GFLOPS

FP64 (double)

11.81 GFLOPS

Graphics Processor

GF108

GPU Name

GF117

-

GPU Variant

N14M-GL

Fermi

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.585 billion

Transistors

0.585 billion

116 mm²

Die Size

116 mm²

Board Design

32W

TDP

15W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

2.1

5.1

Shader Model

5.1

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