NVIDIA Tesla K20Xm vs NVIDIA A40 PCIe
GPU · Specs Compare
Graphics Card
Release Date
Nov 2012
Oct 2020
Generation
Tesla
Tesla
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Memory Clock
1300 MHz
1812 MHz
Base Clock
—
1305 MHz
Boost Clock
—
1740 MHz
Memory
Memory Size
6GB
48GB
Memory Type
GDDR5
GDDR6
Memory Bus
384bit
384bit
Bandwidth
249.6GB/s
695.8GB/s
Render Config
Shading Units
2688
10752
TMUs
224
336
ROPs
48
112
L1 Cache
16 KB (per SMX)
128 KB (per SM)
L2 Cache
1536 KB
6 MB
SM Count
—
84
Tensor Cores
—
336
RT Cores
—
84
Theoretical Performance
Pixel Rate
40.99 GPixel/s
194.9 GPixel/s
Texture Rate
164.0 GTexel/s
584.6 GTexel/s
FP32 (float)
3.935 TFLOPS
37.42 TFLOPS
FP64 (double)
1312 GFLOPS
584.6 GFLOPS
FP16 (half)
—
37.42 TFLOPS
Graphics Processor
GPU Name
GK110
GA102
Architecture
Kepler
Ampere
Foundry
TSMC
Samsung
Process Size
28 nm
8 nm
Transistors
7.08 billion
28.3 billion
Die Size
561 mm²
628 mm²
Board Design
TDP
235W
300W
Suggested PSU
550 W
700 W
Outputs
No outputs
3x DisplayPort 1.4a
Power Connectors
—
8-pin EPS
Graphics Features
DirectX
12 (11_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.1
1.3
CUDA
3.5
8.6
Shader Model
5.1
6.6
▲ Specs Compare
Data sourced from official specifications and benchmark tests.