AMD Radeon R9 M485X vs NVIDIA GeForce GT 820M

VS

AMD Radeon R9 M485X

NVIDIA GeForce GT 820M

We compared two Mobile platform GPUs: 8GB VRAM Radeon R9 M485X and 1024MB VRAM GeForce GT 820M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M485X 's Advantages

Released 2 years and 6 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (160.0GB/s vs 14.40GB/s)

1952 additional rendering cores

NVIDIA GeForce GT 820M 's Advantages

Lower TDP (15W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M485X +893%

2.961 TFLOPS

GeForce GT 820M

0.298 TFLOPS

Radeon R9 M485X

VS

GeForce GT 820M

Graphics Card

May 2016

Release Date

Nov 2013

Crystal System

Generation

GeForce 800M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

900 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

160.0GB/s

Bandwidth

14.40GB/s

Render Config

32

Compute Units

-

SM Count

2

2048

Shading Units

96

128

TMUs

16

32

ROPs

8

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

3.100 GPixel/s

92.54 GTexel/s

Texture Rate

12.40 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

297.6 GFLOPS

185.1 GFLOPS

FP64 (double)

24.80 GFLOPS

Board Design

250W

TDP

15W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

GF117

Amethyst XT

GPU Variant

N15V-GM

GCN 3.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

0.585 billion

366 mm²

Die Size

116 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.3

Shader Model

5.1

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