AMD Radeon R5 M255 vs NVIDIA GeForce GTX 660M

VS

AMD Radeon R5 M255

NVIDIA GeForce GTX 660M

We compared two Mobile platform GPUs: 2GB VRAM Radeon R5 M255 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 R5 M255 's Advantages

Released 2 years and 7 months late

More VRAM (2GB vs 1024GB)

NVIDIA GeForce GTX 660M 's Advantages

Boost Clock has increased by 1% (950MHz vs 940MHz)

Larger VRAM bandwidth (64.00GB/s vs 32.00GB/s)

Score

Benchmark

FP32 (float)

Radeon R5 M255

0.721 TFLOPS

GeForce GTX 660M +1%

0.73 TFLOPS

Radeon R5 M255

VS

GeForce GTX 660M

Graphics Card

Oct 2014

Release Date

Mar 2012

Gem System

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

925 MHz

Base Clock

835 MHz

940 MHz

Boost Clock

950 MHz

1000 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

32.00GB/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)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

7.520 GPixel/s

Pixel Rate

7.600 GPixel/s

22.56 GTexel/s

Texture Rate

30.40 GTexel/s

721.9 GFLOPS

FP16 (half)

-

721.9 GFLOPS

FP32 (float)

729.6 GFLOPS

45.12 GFLOPS

FP64 (double)

30.40 GFLOPS

Board Design

Unknown

TDP

50W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Topaz

GPU Name

GK107

Topaz PRO (216-0858030)

GPU Variant

N13E-GE-A2

GCN 3.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.55 billion

Transistors

1.27 billion

125 mm²

Die Size

118 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2.170

Vulkan

1.1

-

CUDA

3.0

6.5

Shader Model

5.1

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