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

VS

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

We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 850A 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 850A 's Advantages

Released 11 months late

Boost Clock936MHz

256 additional rendering cores

Lower TDP (45W vs 50W)

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Larger VRAM bandwidth (80.00GB/s vs 28.80GB/s)

Score

Benchmark

FP32 (float)

GeForce GTX 850A +64%

1.198 TFLOPS

GeForce GTX 660M Mac Edition

0.73 TFLOPS

GeForce GTX 850A

VS

GeForce GTX 660M Mac Edition

Graphics Card

Mar 2014

Release Date

Apr 2013

GeForce 800A

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

902 MHz

Base Clock

-

936 MHz

Boost Clock

-

900 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.80GB/s

Bandwidth

80.00GB/s

Render Config

-

SM Count

-

Compute Units

-

640

Shading Units

384

40

TMUs

32

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

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

-

FP16 (half)

-

1198 GFLOPS

FP32 (float)

729.6 GFLOPS

37.44 GFLOPS

FP64 (double)

30.40 GFLOPS

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

Board Design

45W

TDP

50W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

None

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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