NVIDIA GeForce GTX 780M Mac Edition vs NVIDIA GeForce GT 645M
We compared two Mobile platform GPUs: 4GB VRAM GeForce GTX 780M 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
NVIDIA GeForce GTX 780M Mac Edition 's Advantages
Released 1 years and 1 months late
Boost Clock797MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 28.80GB/s)
1152 additional rendering cores
NVIDIA GeForce GT 645M 's Advantages
Lower TDP (32W vs 122W)
Score
Benchmark
FP32 (float)
GeForce GTX 780M Mac Edition
+350%
2.448 TFLOPS
GeForce GT 645M
0.544 TFLOPS
Graphics Card
Nov 2013
Release Date
Oct 2012
GeForce 700M
Generation
GeForce 600M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
771 MHz
Base Clock
-
797 MHz
Boost Clock
-
1250 MHz
Memory Clock
900 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
128bit
160.0GB/s
Bandwidth
28.80GB/s
Render Config
-
-
-
-
-
-
1536
Shading Units
384
128
TMUs
32
32
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
25.50 GPixel/s
Pixel Rate
5.672 GPixel/s
102.0 GTexel/s
Texture Rate
22.69 GTexel/s
-
-
-
2.448 TFLOPS
FP32 (float)
544.5 GFLOPS
102.0 GFLOPS
FP64 (double)
22.69 GFLOPS
Board Design
122W
TDP
32W
-
-
-
No outputs
Outputs
No outputs
-
-
-
Graphics Processor
GK104
GPU Name
GK107
N14E-GTX-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
