GeForce GT 640M Mac Edition vs GeForce 945A
We compared two Mobile platform GPUs: 512MB VRAM GeForce GT 640M Mac Edition and 1024MB VRAM GeForce 945A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GT 640M Mac Edition 's Advantages
Lower TDP (32W vs 33W)
GeForce 945A 's Advantages
Released 2 years and 1 months late
Boost Clock1189MHz
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (40.10GB/s vs 40.00GB/s)
Score
Benchmark
FP32 (float)
GeForce GT 640M Mac Edition
572
GeForce 945A
+59%
913
Graphics Card
Feb 2013
Release Date
Mar 2015
GeForce 600M
Generation
GeForce 900A
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
1253 MHz
Memory
512MB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
64bit
Memory Bus
64bit
40.00GB/s
Bandwidth
40.10GB/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
33W
No outputs
Outputs
No outputs
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
