NVIDIA GeForce GTX 850A vs NVIDIA GeForce GTX 660M

VS

NVIDIA GeForce GTX 850A

NVIDIA GeForce GTX 660M

We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 850A and 1024MB VRAM GeForce GTX 660M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 850A 's Advantages

Released 2 years late

More VRAM (2GB vs 1024GB)

256 additional rendering cores

Lower TDP (45W vs 50W)

NVIDIA GeForce GTX 660M 's Advantages

Boost Clock has increased by 1% (950MHz vs 936MHz)

Larger VRAM bandwidth (64.00GB/s vs 28.80GB/s)

Score

Benchmark

FP32 (float)

GeForce GTX 850A +64%

1.198 TFLOPS

GeForce GTX 660M

0.73 TFLOPS

GeForce GTX 850A

VS

GeForce GTX 660M

Graphics Card

Mar 2014

Release Date

Mar 2012

GeForce 800A

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

902 MHz

Base Clock

835 MHz

936 MHz

Boost Clock

950 MHz

900 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.80GB/s

Bandwidth

64.00GB/s

Render Config

-

640

Shading Units

384

40

TMUs

32

16

ROPs

16

-

64 KB (per SMM)

L1 Cache

16 KB (per SMX)

2 MB

L2 Cache

256 KB

-

Theoretical Performance

14.98 GPixel/s

Pixel Rate

7.600 GPixel/s

37.44 GTexel/s

Texture Rate

30.40 GTexel/s

-

1198 GFLOPS

FP32 (float)

729.6 GFLOPS

37.44 GFLOPS

FP64 (double)

30.40 GFLOPS

Board Design

45W

TDP

50W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM107

GPU Name

GK107

N15P-GT-A1

GPU Variant

N13E-GE-A2

Maxwell

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.87 billion

Transistors

1.27 billion

148 mm²

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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