GeForce GT 645M vs GeForce GT 640M
We compared two Mobile platform GPUs: 2GB VRAM GeForce GT 645M and 2GB VRAM GeForce GT 640M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GT 645M 's Advantages
Released 7 months late
Score
Benchmark
FP32 (float)
GeForce GT 645M
+13%
544
GeForce GT 640M
480
3DMark Time Spy
GeForce GT 645M
+7%
358
GeForce GT 640M
334
Graphics Card
Oct 2012
Release Date
Mar 2012
GeForce 600M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
900 MHz
Memory Clock
900 MHz
Memory
2GB
Memory Size
2GB
DDR3
Memory Type
DDR3
128bit
Memory Bus
128bit
28.80GB/s
Bandwidth
28.80GB/s
Render Config
384
Shading Units
384
32
TMUs
32
16
ROPs
16
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
256 KB
L2 Cache
256 KB
Theoretical Performance
5.672 GPixel/s
Pixel Rate
5.000 GPixel/s
22.69 GTexel/s
Texture Rate
20.00 GTexel/s
544.5 GFLOPS
FP32 (float)
480.0 GFLOPS
22.69 GFLOPS
FP64 (double)
20.00 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
