AMD Radeon R5 M255 vs NVIDIA GeForce GT 620M

VS

AMD Radeon R5 M255

NVIDIA GeForce GT 620M

We compared two Mobile platform GPUs: 2GB VRAM Radeon R5 M255 and 1024MB VRAM GeForce GT 620M 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 2 months late

Boost Clock940MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (32.00GB/s vs 28.80GB/s)

288 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R5 M255 +184%

0.721 TFLOPS

GeForce GT 620M

0.253 TFLOPS

Radeon R5 M255

VS

GeForce GT 620M

Graphics Card

Oct 2014

Release Date

Aug 2012

Gem System

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

940 MHz

Boost Clock

-

1000 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

DDR3

128bit

Memory Bus

128bit

32.00GB/s

Bandwidth

28.80GB/s

Render Config

6

Compute Units

-

SM Count

2

384

Shading Units

96

24

TMUs

16

8

ROPs

4

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

7.520 GPixel/s

Pixel Rate

2.640 GPixel/s

22.56 GTexel/s

Texture Rate

10.56 GTexel/s

721.9 GFLOPS

FP16 (half)

-

721.9 GFLOPS

FP32 (float)

253.4 GFLOPS

45.12 GFLOPS

FP64 (double)

21.12 GFLOPS

Board Design

Unknown

TDP

15W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Topaz

GPU Name

GF108

Topaz PRO (216-0858030)

GPU Variant

N13P-GLP-A1

GCN 3.0

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.55 billion

Transistors

0.585 billion

125 mm²

Die Size

116 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.2.170

Vulkan

N/A

-

CUDA

2.1

6.5

Shader Model

5.1

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