NVIDIA GeForce GTX 980MX vs NVIDIA GeForce GT 640M Mac Edition

VS

NVIDIA GeForce GTX 980MX

NVIDIA GeForce GT 640M Mac Edition

We compared two Mobile platform GPUs: 8GB VRAM GeForce GTX 980MX 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

NVIDIA GeForce GTX 980MX 's Advantages

Released 3 years and 4 months late

Boost Clock1178MHz

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 40.00GB/s)

1280 additional rendering cores

NVIDIA GeForce GT 640M Mac Edition 's Advantages

Lower TDP (32W vs 148W)

Score

Benchmark

FP32 (float)

GeForce GTX 980MX +585%

3.92 TFLOPS

GeForce GT 640M Mac Edition

0.572 TFLOPS

GeForce GTX 980MX

VS

GeForce GT 640M Mac Edition

Graphics Card

Jun 2016

Release Date

Feb 2013

GeForce 900M

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1050 MHz

Base Clock

-

1178 MHz

Boost Clock

-

1500 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

40.00GB/s

Render Config

-

1664

Shading Units

384

104

TMUs

32

64

ROPs

8

-

48 KB (per SMM)

L1 Cache

16 KB (per SMX)

2 MB

L2 Cache

128 KB

-

Theoretical Performance

75.39 GPixel/s

Pixel Rate

5.960 GPixel/s

122.5 GTexel/s

Texture Rate

23.84 GTexel/s

-

3.920 TFLOPS

FP32 (float)

572.2 GFLOPS

122.5 GFLOPS

FP64 (double)

23.84 GFLOPS

Board Design

148W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

GM204

GPU Name

GK107

N16E-GXX-A1

GPU Variant

N13P-GS

Maxwell 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5.2 billion

Transistors

1.27 billion

398 mm²

Die Size

118 mm²

Graphics Features

12 (12_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

5.2

CUDA

3.0

6.4

Shader Model

5.1

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