GeForce GT 640M Mac Edition vs GeForce GTX 660M Mac Edition
We compared two Mobile platform GPUs: 512MB VRAM GeForce GT 640M Mac Edition and 512MB VRAM GeForce GTX 660M Mac Edition 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 50W)
GeForce GTX 660M Mac Edition 's Advantages
Larger VRAM bandwidth (80.00GB/s vs 40.00GB/s)
Score
Benchmark
FP32 (float)
GeForce GT 640M Mac Edition
572
GeForce GTX 660M Mac Edition
+27%
730
Graphics Card
Feb 2013
Release Date
Apr 2013
GeForce 600M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
MXM-B (3.0)
Clock Speeds
1250 MHz
Memory Clock
1250 MHz
Memory
512MB
Memory Size
512MB
GDDR5
Memory Type
GDDR5
64bit
Memory Bus
128bit
40.00GB/s
Bandwidth
80.00GB/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
7.600 GPixel/s
23.84 GTexel/s
Texture Rate
30.40 GTexel/s
572.2 GFLOPS
FP32 (float)
729.6 GFLOPS
23.84 GFLOPS
FP64 (double)
30.40 GFLOPS
Board Design
32W
TDP
50W
No outputs
Outputs
No outputs
-
Power Connectors
None
Graphics Processor
GK107
GPU Name
GK107
N13P-GS
GPU Variant
-
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
