AMD Radeon HD 8670A vs NVIDIA GeForce GTX 660M

VS

AMD Radeon HD 8670A

NVIDIA GeForce GTX 660M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 8670A and 1024MB VRAM GeForce GTX 660M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8670A 's Advantages

Released 11 months late

Lower TDP (45W vs 50W)

NVIDIA GeForce GTX 660M 's Advantages

Boost Clock950MHz

Larger VRAM bandwidth (64.00GB/s vs 16.00GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 8670A

0.461 TFLOPS

GeForce GTX 660M +58%

0.73 TFLOPS

Radeon HD 8670A

VS

GeForce GTX 660M

Graphics Card

Feb 2013

Release Date

Mar 2012

All-In-One

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

835 MHz

-

Boost Clock

950 MHz

1000 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.00GB/s

Bandwidth

64.00GB/s

Render Config

6

Compute Units

-

384

Shading Units

384

24

TMUs

32

8

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

4.800 GPixel/s

Pixel Rate

7.600 GPixel/s

14.40 GTexel/s

Texture Rate

30.40 GTexel/s

-

460.8 GFLOPS

FP32 (float)

729.6 GFLOPS

28.80 GFLOPS

FP64 (double)

30.40 GFLOPS

Board Design

45W

TDP

50W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Mars

GPU Name

GK107

Mars XT

GPU Variant

N13E-GE-A2

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

0.95 billion

Transistors

1.27 billion

77 mm²

Die Size

118 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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