GeForce G105M vs GeForce GT 640M
We compared two Mobile platform GPUs: 256MB VRAM GeForce G105M and 2GB VRAM GeForce GT 640M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce G105M 's Advantages
Lower TDP (14W vs 32W)
GeForce GT 640M 's Advantages
Released 2 years and 8 months late
More VRAM (2GB vs 256GB)
Larger VRAM bandwidth (28.80GB/s vs 11.20GB/s)
368 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce G105M
34
GeForce GT 640M
+1311%
480
Graphics Card
Jul 2009
Release Date
Mar 2012
GeForce 100M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
700 MHz
Memory Clock
900 MHz
Memory
256MB
Memory Size
2GB
GDDR3
Memory Type
DDR3
64bit
Memory Bus
128bit
11.20GB/s
Bandwidth
28.80GB/s
Render Config
2
SM Count
-
16
Shading Units
384
8
TMUs
32
4
ROPs
16
-
L1 Cache
16 KB (per SMX)
32 KB
L2 Cache
256 KB
Theoretical Performance
2.000 GPixel/s
Pixel Rate
5.000 GPixel/s
4.000 GTexel/s
Texture Rate
20.00 GTexel/s
34.24 GFLOPS
FP32 (float)
480.0 GFLOPS
-
FP64 (double)
20.00 GFLOPS
Board Design
14W
TDP
32W
No outputs
Outputs
No outputs
Graphics Processor
GT218
GPU Name
GK107
GT218-300-A2
GPU Variant
N13P-GS
Tesla 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
0.26 billion
Transistors
1.27 billion
57 mm²
Die Size
118 mm²
Graphics Features
11.1 (10_1)
DirectX
12 (11_0)
3.3
OpenGL
4.6
1.1
OpenCL
3.0
N/A
Vulkan
1.1
1.2
CUDA
3.0
4.1
Shader Model
5.1
