AMD Radeon HD 6870M vs NVIDIA GeForce GTX 660M Mac Edition

VS

AMD Radeon HD 6870M NVIDIA GeForce GTX 660M Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6870M 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

AMD Radeon HD 6870M 's Advantages

More VRAM (1024GB vs 512GB)

416 additional rendering cores

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Released 2 years and 3 months late

Larger VRAM bandwidth (80.00GB/s vs 64.00GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 6870M +47%

1.08 TFLOPS

GeForce GTX 660M Mac Edition

0.73 TFLOPS

Radeon HD 6870M

VS

GeForce GTX 660M Mac Edition

Graphics Card

Jan 2011

Release Date

Apr 2013

Vancouver

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

-

Boost Clock

-

1000 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

80.00GB/s

Render Config

-

SM Count

-

10

Compute Units

-

800

Shading Units

384

40

TMUs

32

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

Theoretical Performance

10.80 GPixel/s

Pixel Rate

7.600 GPixel/s

27.00 GTexel/s

Texture Rate

30.40 GTexel/s

-

FP16 (half)

-

1080 GFLOPS

FP32 (float)

729.6 GFLOPS

-

FP64 (double)

30.40 GFLOPS

Graphics Processor

Granville

GPU Name

GK107

Granville XT (216-0769024)

GPU Variant

-

TeraScale 2

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.04 billion

Transistors

1.27 billion

166 mm²

Die Size

118 mm²

Board Design

50W

TDP

50W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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