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