GeForce GT 640M 

Released March, 2012
  • 625 MHz
  • 2 GB DDR3
6.3 Out of 10

When it comes to building and configuring Core M, Intel likes to refer to their efforts as the “Fanless Challenge,” reflecting the fact that their biggest goal with Core M is to comfortably get the processor in to 10” tablets under 10mm in thickness that are passively cooled.
by Ryan-Smith (Aug, 2014)
This is similar to Ivy Bridge (4%-6%), though at this stage in the game Intel is not talking about expected clockspeeds or the resulting overall performance improvement.
by Ryan-Smith (Aug, 2014)

GPUBoss Review Our evaluation of the GeForce GT 640M among Laptop GPUs under 35W TDP

Gaming

GeForce GT 640M
5.5
Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more

Graphics

GeForce GT 640M
7.8
T-Rex, Manhattan and Cloud Gate Factor

Computing

GeForce GT 640M
6.4
Face Detection, Ocean Surface Simulation and 3 more

Performance per Watt

GeForce GT 640M
5.9
Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Value

GeForce GT 640M
n.d.
Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Noise and Power

GeForce GT 640M
5.2
TDP, Idle Power Consumption, Load Power Consumption and 2 more

6.3

Overall Score

GeForce GT 640M
6.3

Benchmarks Real world tests of the GeForce GT 640M

Bitcoin mining Data courtesy CompuBench

GeForce GT 640M
17.53 mHash/s
GeForce 940M
101.35 mHash/s
GeForce 920M
39.89 mHash/s

Face detection Data courtesy CompuBench

GeForce GT 640M
7.82 mPixels/s
GeForce 940M
25.27 mPixels/s
GeForce 920M
8.35 mPixels/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 640M
1,525.35
GeForce 920M
3,365.32
GeForce 940M
2,003.78

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 640M
3,587.45
GeForce 940M
1,746.08
GeForce 920M
3,710.28

Fire Strike Factor Data courtesy FutureMark

GeForce GT 640M
11.21
GeForce 940M
17.26
GeForce 920M
10.33

Sky Diver Factor Data courtesy FutureMark

GeForce GT 640M
105.54
GeForce 940M
172.58
GeForce 920M
97.86

Thief

GeForce GT 640M
8.35

Battlefield 4

GeForce GT 640M
9.9

In The News From around the web

11
Aug

Intel Broadwell Architecture Preview: A Glimpse into Core M

by Ryan Smith |
www.anandtech.com
When it comes to building and configuring Core M, Intel likes to refer to their efforts as the “Fanless Challenge,” reflecting the fact that their biggest goal with Core M is to comfortably get the processor in to 10” tablets under 10mm in thickness that are passively cooled.
The end result no doubt limited what performance optimizations Intel could integrate into Broadwell’s design, but it also functionally reduces power requirements for any given performance level, furthering Intel’s goals in getting Core performance in a mobile device.
So let’s talk about the GPUs themselves, NVIDIA’s first tier chips would be MXM design which means they would be interchangeable, upgradable and even offer SLI support on some notebook designs.
Next up, we have the entry level models which will feature the onboard design which mean that these GPUs will be permanently soldered to the mainboard hence no upgrading can be possible.
The 760M and 765M both use 768 CUDA cores, but the 765M is clocked almost 200MHz faster.
The RAM and core are connected via a 256-bit interface.
1
Apr

Nvidia announces five new Geforce 700M GPUs

by Slobodan Simic |
www.fudzilla.com
It is not clear how GT 740M ends up clocked higher than the GT 745M but it might have something to do with the maximum Boost.
All five new GPUs will feature Nvidia GPU Boost 2.0, Optimus and Nvidia Geforce Experience technologies.

Specifications Full list of technical specs

gpu

GPU brand Nvidia
GPU name GK107
Market Laptop
Clock speed 625 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 384
Texture mapping units 32
Render output processors 16
Pixel rate 5 GPixel/s
Texture rate 20 GTexel/s
Floating-point performance 480 GFLOPS

memory

Memory clock speed 900 MHz
Effective memory clock speed 1,800 MHz
Memory bus 128 bit
Memory 2,048 MB
Memory type DDR3
Memory bandwidth 28.8 GB/s

noise and power

TDP 32W
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