GeForce GT 640M Mac 

Released February, 2013
  • 745 MHz
  • 512 MB GDDR5
7.1 Out of 10

The range is powered by Kepler from bottom to top and brings great performance to mobile platforms.
by Trace-Hagan (May, 2013)
The RAM and core are connected via a 256-bit interface.
by Trace-Hagan (May, 2013)

Benchmarks Real world tests of the GeForce GT 640M Mac

Bitcoin mining Data courtesy CompuBench

GeForce GT 640M Mac
12.55 mHash/s
GeForce 840M
90.74 mHash/s

Face detection Data courtesy CompuBench

GeForce GT 640M Mac
6.58 mPixels/s
GeForce 840M
22.25 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GT 640M Mac
226.22 frames/s
GeForce 840M
158.81 frames/s

Particle simulation Data courtesy CompuBench

GeForce GT 640M Mac
69.88 mInteraction/s
GeForce 840M
169.15 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GT 640M Mac
0.56 frames/s
GeForce 840M
1.21 frames/s

Video composition Data courtesy CompuBench

GeForce GT 640M Mac
11.95 frames/s
GeForce 840M
21 frames/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 640M Mac
3,356.32
GeForce 840M
3,359.61

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 640M Mac
2,290.86
GeForce 840M
3,718.04

In The News From around the web

24
Sep

Apple iMac 2013 Launches with Haswell Processors and Iris Pro Graphics.

by Syed Muhammad Usman Pirzada |
wccftech.com
Updates include a much faster Haswell Processor, Iris Pro integrated graphics and Nvidia 700 Series Dedicated Graphic Cards.
“The entry-level 21.5-inch iMac features a 2.7 GHz quad-core Intel Core i5 processor and new Iris Pro graphics for unprecedented levels of integrated graphics performance.
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.

Specifications Full list of technical specs

gpu

GPU brand Nvidia
GPU name GK107
Market Laptop
Clock speed 745 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 384
Texture mapping units 32
Render output processors 8
Pixel rate 5.96 GPixel/s
Texture rate 23.84 GTexel/s
Floating-point performance 572.2 GFLOPS

memory

Memory clock speed 1,250 MHz
Effective memory clock speed 5,000 MHz
Memory bus 64 bit
Memory 512 MB
Memory type GDDR5
Memory bandwidth 40 GB/s

noise and power

TDP 32W
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