Home GPU Comparison NVIDIA GeForce 945M vs NVIDIA GeForce GT 640M

NVIDIA GeForce 945M vs NVIDIA GeForce GT 640M

We compared two Mobile platform GPUs: 1024MB VRAM GeForce 945M and 2GB VRAM GeForce GT 640M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 945M 's Advantages
Released 4 years and 1 months late
Boost Clock1189MHz
Lower TDP (23W vs 32W)
NVIDIA GeForce GT 640M 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (28.80GB/s vs 16.02GB/s)

Score

Benchmark

FP32 (float)
GeForce 945M +90%
0.913 TFLOPS
GeForce GT 640M
0.48 TFLOPS
VS

Graphics Card

Apr 2016
Release Date
Mar 2012
GeForce 900M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 3.0 x16

Clock Speeds

1006 MHz
Base Clock
-
1189 MHz
Boost Clock
-
1001 MHz
Memory Clock
900 MHz

Memory

1024MB
Memory Size
2GB
DDR3
Memory Type
DDR3
64bit
Memory Bus
128bit
16.02GB/s
Bandwidth
28.80GB/s

Render Config

-
-
-
-
-
-
384
Shading Units
384
24
TMUs
32
8
ROPs
16
-
-
-
-
-
-
64 KB (per SMM)
L1 Cache
16 KB (per SMX)
1024 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

9.512 GPixel/s
Pixel Rate
5.000 GPixel/s
28.54 GTexel/s
Texture Rate
20.00 GTexel/s
-
-
-
913.2 GFLOPS
FP32 (float)
480.0 GFLOPS
28.54 GFLOPS
FP64 (double)
20.00 GFLOPS

Board Design

23W
TDP
32W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-

Graphics Processor

GM108
GPU Name
GK107
-
GPU Variant
N13P-GS
Maxwell
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
Unknown
Transistors
1.27 billion
Unknown
Die Size
118 mm²

Graphics Features

12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.0
CUDA
3.0
5.1
Shader Model
5.1

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