NVIDIA GeForce GTX 850M vs NVIDIA GeForce GTX 660M Mac Edition

VS

NVIDIA GeForce GTX 850M

NVIDIA GeForce GTX 660M Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 850M and 512MB VRAM GeForce GTX 660M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 850M 's Advantages

Released 11 months late

More VRAM (2GB vs 512GB)

256 additional rendering cores

Lower TDP (45W vs 50W)

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Larger VRAM bandwidth (80.00GB/s vs 32.03GB/s)

Score

Benchmark

FP32 (float)

GeForce GTX 850M +58%

1.155 TFLOPS

GeForce GTX 660M Mac Edition

0.73 TFLOPS

GeForce GTX 850M

VS

GeForce GTX 660M Mac Edition

Graphics Card

Mar 2014

Release Date

Apr 2013

GeForce 800M

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1001 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

32.03GB/s

Bandwidth

80.00GB/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

14.43 GPixel/s

Pixel Rate

7.600 GPixel/s

36.08 GTexel/s

Texture Rate

30.40 GTexel/s

-

1155 GFLOPS

FP32 (float)

729.6 GFLOPS

36.08 GFLOPS

FP64 (double)

30.40 GFLOPS

Board Design

45W

TDP

50W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

GM107

GPU Name

GK107

N15P-GT-A1

GPU Variant

-

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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