AMD Radeon R9 M485X vs NVIDIA GeForce GT 640M Mac Edition

VS

AMD Radeon R9 M485X

NVIDIA GeForce GT 640M Mac Edition

We compared two Mobile platform GPUs: 8GB VRAM Radeon R9 M485X and 512MB VRAM GeForce GT 640M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M485X 's Advantages

Released 3 years and 3 months late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 40.00GB/s)

1664 additional rendering cores

NVIDIA GeForce GT 640M Mac Edition 's Advantages

Lower TDP (32W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M485X +417%

2.961 TFLOPS

GeForce GT 640M Mac Edition

0.572 TFLOPS

Radeon R9 M485X

VS

GeForce GT 640M Mac Edition

Graphics Card

May 2016

Release Date

Feb 2013

Crystal System

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

160.0GB/s

Bandwidth

40.00GB/s

Render Config

32

Compute Units

-

2048

Shading Units

384

128

TMUs

32

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

5.960 GPixel/s

92.54 GTexel/s

Texture Rate

23.84 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

572.2 GFLOPS

185.1 GFLOPS

FP64 (double)

23.84 GFLOPS

Board Design

250W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

GK107

Amethyst XT

GPU Variant

N13P-GS

GCN 3.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

1.27 billion

366 mm²

Die Size

118 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

6.3

Shader Model

5.1

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