NVIDIA GeForce GT 640M Mac Edition vs NVIDIA GeForce 945M
We compared two Mobile platform GPUs: 512MB VRAM GeForce GT 640M Mac Edition and 1024MB VRAM GeForce 945M 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 16.02GB/s)
NVIDIA GeForce 945M 's Advantages
Released 3 years and 2 months late
Boost Clock1189MHz
More VRAM (1024GB vs 512GB)
Lower TDP (23W vs 32W)
Score
Benchmark
FP32 (float)
GeForce GT 640M Mac Edition
0.572 TFLOPS
GeForce 945M
+59%
0.913 TFLOPS
Graphics Card
Feb 2013
Release Date
Apr 2016
GeForce 600M
Generation
GeForce 900M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x8
Clock Speeds
-
Base Clock
1006 MHz
-
Boost Clock
1189 MHz
1250 MHz
Memory Clock
1001 MHz
Memory
512MB
Memory Size
1024MB
GDDR5
Memory Type
DDR3
64bit
Memory Bus
64bit
40.00GB/s
Bandwidth
16.02GB/s
Render Config
-
-
-
-
-
-
384
Shading Units
384
32
TMUs
24
8
ROPs
8
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SMM)
128 KB
L2 Cache
1024 KB
-
-
-
Theoretical Performance
5.960 GPixel/s
Pixel Rate
9.512 GPixel/s
23.84 GTexel/s
Texture Rate
28.54 GTexel/s
-
-
-
572.2 GFLOPS
FP32 (float)
913.2 GFLOPS
23.84 GFLOPS
FP64 (double)
28.54 GFLOPS
Board Design
32W
TDP
23W
-
-
-
No outputs
Outputs
No outputs
-
Power Connectors
None
Graphics Processor
GK107
GPU Name
GM108
N13P-GS
GPU Variant
-
Kepler
Architecture
Maxwell
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
Unknown
118 mm²
Die Size
Unknown
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
