GeForce 940M vs GeForce GT 640M Mac Edition
We compared two Mobile platform GPUs: 2GB VRAM GeForce 940M 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
GeForce 940M 's Advantages
Released 2 years and 1 months late
Boost Clock1098MHz
More VRAM (2GB vs 512GB)
128 additional rendering cores
GeForce GT 640M Mac Edition 's Advantages
Larger VRAM bandwidth (40.00GB/s vs 14.40GB/s)
Lower TDP (32W vs 75W)
Score
Benchmark
FP32 (float)
GeForce 940M
+96%
1124
GeForce GT 640M Mac Edition
572
Graphics Card
Mar 2015
Release Date
Feb 2013
GeForce 900M
Generation
GeForce 600M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
1020 MHz
Base Clock
-
1098 MHz
Boost Clock
-
900 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
512MB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
64bit
14.40GB/s
Bandwidth
40.00GB/s
Render Config
512
Shading Units
384
32
TMUs
32
16
ROPs
8
64 KB (per SMM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
128 KB
Theoretical Performance
17.57 GPixel/s
Pixel Rate
5.960 GPixel/s
35.14 GTexel/s
Texture Rate
23.84 GTexel/s
1124 GFLOPS
FP32 (float)
572.2 GFLOPS
35.14 GFLOPS
FP64 (double)
23.84 GFLOPS
Board Design
75W
TDP
32W
No outputs
Outputs
No outputs
Graphics Processor
GM107
GPU Name
GK107
N16S-GT1-KB-B
GPU Variant
N13P-GS
Maxwell
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.87 billion
Transistors
1.27 billion
148 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.0
CUDA
3.0
5.1
Shader Model
5.1
