GeForce GT 650M vs GeForce 840M

GeForce GT 650M Memory: 1024Mb DDR3MOBILE Release date: 22 Mar 2012

GeForce 840M Memory: 1024Mb DDR3MOBILE Release date: 12 Mar 2014

Summary

Synthetic performance index

GeForce GT 650M
100%
GeForce 840M
113%

Relative performance

Reasons to consider GeForce GT 650M

Supports PhysX

Supports G-Sync

Supports ShadowPlay (allows game streaming/recording with minimum performance penalty)

Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications

Reasons to consider GeForce 840M

This is a much newer product, it might have better long term support.

Around 13% higher average synthetic performance.

Supports PhysX

Supports G-Sync

Supports ShadowPlay (allows game streaming/recording with minimum performance penalty)

Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications

HWBench recommends GeForce 840M

The GeForce 840M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

Specifications

Core Configuration

	GeForce GT 650M		GeForce 840M
GPU Name	GK107 (N13P-GT-A2)	vs	GM108 (N15S-GT)
Fab Process	28 nm	vs	28 nm
Die Size	118 mmÂ²	vs	0 mmÂ²
Transistors	1,270 million	vs	unknown
Shaders	384	vs	384
Compute Units	2	vs	3
Core clock	850 MHz	vs	1029 MHz
ROPs	16	vs	8
TMUs	32	vs	16

Memory Configuration

	GeForce GT 650M		GeForce 840M
Memory Type	DDR3	vs	DDR3
Bus Width	128 bit	vs	64 bit
Memory Speed	900 MHz 1800 MHz effective	vs	1001 MHz 2002 MHz effective
Memory Size	1024 Mb	vs	1024 Mb

Additional details

	GeForce GT 650M		GeForce 840M
TDP	45 watts	vs	33 watts
Release Date	22 Mar 2012	vs	12 Mar 2014

Raw Performance comparison

Pixel Rate

GeForce GT 650M
6.80 GP/s
GeForce 840M
8.23 GP/s

GigaPixels - higher is better

Texel Rate

GeForce GT 650M
27.20 GT/s
GeForce 840M
16.46 GT/s

GigaTexels - higher is better

Memory bandwidth

GeForce GT 650M
28.80 GB/s
GeForce 840M
16.02 GB/s

GB/s - higher is better

Single precision performance

GeForce GT 650M
652.80 GFLOPs
GeForce 840M
790.30 GFLOPs

GFLOPs - higher is better

Synthetic benchmarks

3DMark 11

GeForce GT 650M
2140
GeForce 840M
2430

Points (higher is better)

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