NVIDIA GeForce GTX 850M vs NVIDIA GeForce GT 640M LE

VS

NVIDIA GeForce GTX 850M NVIDIA GeForce GT 640M LE

We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 850M and 2GB VRAM GeForce GT 640M LE to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 850M 's Advantages

Released 1 years and 10 months late

544 additional rendering cores

NVIDIA GeForce GT 640M LE 's Advantages

Larger VRAM bandwidth (50.24GB/s vs 32.03GB/s)

Lower TDP (32W vs 45W)

Score

Benchmark

FP32 (float)

GeForce GTX 850M +299%

1.155 TFLOPS

GeForce GT 640M LE

0.289 TFLOPS

GeForce GTX 850M

VS

GeForce GT 640M LE

Graphics Card

Mar 2014

Release Date

May 2012

GeForce 800M

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1001 MHz

Memory Clock

785 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

32.03GB/s

Bandwidth

50.24GB/s

Render Config

-

SM Count

2

-

Compute Units

-

640

Shading Units

96

40

TMUs

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

64 KB (per SMM)

L1 Cache

64 KB (per SM)

2 MB

L2 Cache

256 KB

Theoretical Performance

14.43 GPixel/s

Pixel Rate

3.012 GPixel/s

36.08 GTexel/s

Texture Rate

12.05 GTexel/s

-

FP16 (half)

-

1155 GFLOPS

FP32 (float)

289.0 GFLOPS

36.08 GFLOPS

FP64 (double)

24.08 GFLOPS

Graphics Processor

GM107

GPU Name

GF108

N15P-GT-A1

GPU Variant

-

Maxwell

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.87 billion

Transistors

0.585 billion

148 mm²

Die Size

116 mm²

Board Design

45W

TDP

32W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

1.3

Vulkan

N/A

5.0

CUDA

2.1

5.1

Shader Model

5.1

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