GeForce GT 640M Mac Edition vs GeForce GT 645M
We compared two Mobile platform GPUs: 512MB VRAM GeForce GT 640M Mac Edition and 2GB VRAM GeForce GT 645M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GT 640M Mac Edition 's Advantages
Larger VRAM bandwidth (40.00GB/s vs 28.80GB/s)
GeForce GT 645M 's Advantages
More VRAM (2GB vs 512GB)
Score
Benchmark
FP32 (float)
GeForce GT 640M Mac Edition
+5%
572
GeForce GT 645M
544
Graphics Card
Feb 2013
Release Date
Oct 2012
GeForce 600M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1250 MHz
Memory Clock
900 MHz
Memory
512MB
Memory Size
2GB
GDDR5
Memory Type
DDR3
64bit
Memory Bus
128bit
40.00GB/s
Bandwidth
28.80GB/s
Render Config
384
Shading Units
384
32
TMUs
32
8
ROPs
16
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
128 KB
L2 Cache
256 KB
Theoretical Performance
5.960 GPixel/s
Pixel Rate
5.672 GPixel/s
23.84 GTexel/s
Texture Rate
22.69 GTexel/s
572.2 GFLOPS
FP32 (float)
544.5 GFLOPS
23.84 GFLOPS
FP64 (double)
22.69 GFLOPS
Board Design
32W
TDP
32W
No outputs
Outputs
No outputs
Graphics Processor
GK107
GPU Name
GK107
N13P-GS
GPU Variant
N13P-GS
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
1.27 billion
118 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.0
CUDA
3.0
5.1
Shader Model
5.1
