GeForce RTX 2080 Mobile vs GeForce GT 645M
We compared two Mobile platform GPUs: 8GB VRAM GeForce RTX 2080 Mobile and 2GB VRAM GeForce GT 645M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce RTX 2080 Mobile 's Advantages
Released 6 years and 3 months late
Boost Clock1590MHz
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (448.0GB/s vs 28.80GB/s)
2560 additional rendering cores
GeForce GT 645M 's Advantages
Lower TDP (32W vs 150W)
Score
Benchmark
FP32 (float)
GeForce RTX 2080 Mobile
+1620%
9362
GeForce GT 645M
544
3DMark Time Spy
GeForce RTX 2080 Mobile
+2708%
10054
GeForce GT 645M
358
Graphics Card
Jan 2019
Release Date
Oct 2012
GeForce 20 Mobile
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1380 MHz
Base Clock
-
1590 MHz
Boost Clock
-
1750 MHz
Memory Clock
900 MHz
Memory
8GB
Memory Size
2GB
GDDR6
Memory Type
DDR3
256bit
Memory Bus
128bit
448.0GB/s
Bandwidth
28.80GB/s
Render Config
46
SM Count
-
2944
Shading Units
384
184
TMUs
32
64
ROPs
16
368
Tensor Cores
-
46
RT Cores
-
64 KB (per SM)
L1 Cache
16 KB (per SMX)
4 MB
L2 Cache
256 KB
Theoretical Performance
101.8 GPixel/s
Pixel Rate
5.672 GPixel/s
292.6 GTexel/s
Texture Rate
22.69 GTexel/s
18.72 TFLOPS
FP16 (half)
-
9.362 TFLOPS
FP32 (float)
544.5 GFLOPS
292.6 GFLOPS
FP64 (double)
22.69 GFLOPS
Board Design
150W
TDP
32W
No outputs
Outputs
No outputs
Graphics Processor
TU104
GPU Name
GK107
N18E-G3-A1
GPU Variant
N13P-GS
Turing
Architecture
Kepler
TSMC
Foundry
TSMC
12 nm
Process Size
28 nm
13.6 billion
Transistors
1.27 billion
545 mm²
Die Size
118 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
7.5
CUDA
3.0
6.6
Shader Model
5.1
