GeForce GTX 680MX Mac Edition vs GeForce GT 640M Mac Edition
We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 680MX Mac Edition and 512MB VRAM GeForce GT 640M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GTX 680MX Mac Edition 's Advantages
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (160.0GB/s vs 40.00GB/s)
1152 additional rendering cores
GeForce GT 640M Mac Edition 's Advantages
Lower TDP (32W vs 122W)
Score
Benchmark
FP32 (float)
GeForce GTX 680MX Mac Edition
+286%
2209
GeForce GT 640M Mac Edition
572
Graphics Card
Oct 2012
Release Date
Feb 2013
GeForce 600M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1250 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
512MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
160.0GB/s
Bandwidth
40.00GB/s
Render Config
1536
Shading Units
384
128
TMUs
32
32
ROPs
8
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
128 KB
Theoretical Performance
23.01 GPixel/s
Pixel Rate
5.960 GPixel/s
92.03 GTexel/s
Texture Rate
23.84 GTexel/s
2.209 TFLOPS
FP32 (float)
572.2 GFLOPS
92.03 GFLOPS
FP64 (double)
23.84 GFLOPS
Board Design
122W
TDP
32W
No outputs
Outputs
No outputs
Graphics Processor
GK104
GPU Name
GK107
N13E-GTX2-A2
GPU Variant
N13P-GS
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
1.27 billion
294 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
