GeForce RTX 2080 vs GeForce GT 645 OEM
We compared two Desktop platform GPUs: 8GB VRAM GeForce RTX 2080 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce RTX 2080 's Advantages
Released 6 years and 5 months late
Boost Clock1710MHz
More VRAM (8GB vs 1024GB)
Larger VRAM bandwidth (448.0GB/s vs 91.87GB/s)
2656 additional rendering cores
GeForce GT 645 OEM 's Advantages
Lower TDP (102W vs 215W)
Score
Benchmark
FP32 (float)
GeForce RTX 2080
+1026%
10070
GeForce GT 645 OEM
894
Graphics Card
Sep 2018
Release Date
Apr 2012
GeForce 20
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1515 MHz
Base Clock
-
1710 MHz
Boost Clock
-
1750 MHz
Memory Clock
957 MHz
Memory
8GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
192bit
448.0GB/s
Bandwidth
91.87GB/s
Render Config
46
SM Count
6
2944
Shading Units
288
184
TMUs
48
64
ROPs
24
368
Tensor Cores
-
46
RT Cores
-
64 KB (per SM)
L1 Cache
64 KB (per SM)
4 MB
L2 Cache
384 KB
Theoretical Performance
109.4 GPixel/s
Pixel Rate
9.312 GPixel/s
314.6 GTexel/s
Texture Rate
37.25 GTexel/s
20.14 TFLOPS
FP16 (half)
-
10.07 TFLOPS
FP32 (float)
894.0 GFLOPS
314.6 GFLOPS
FP64 (double)
74.50 GFLOPS
Board Design
215W
TDP
102W
550 W
Suggested PSU
300 W
1x HDMI 2.0
3x DisplayPort 1.4a
1x USB Type-C
Outputs
2x DVI
1x mini-HDMI 1.3a
1x 6-pin + 1x 8-pin
Power Connectors
-
Graphics Processor
TU104
GPU Name
GF114
TU104-400A-A1
GPU Variant
-
Turing
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
12 nm
Process Size
40 nm
13.6 billion
Transistors
1.95 billion
545 mm²
Die Size
332 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.3
Vulkan
N/A
7.5
CUDA
2.1
6.6
Shader Model
5.1
