NVIDIA A40 PCIe vs NVIDIA Tesla K20X
GPU · Specs Compare
Graphics Card
Release Date
Oct 2020
Nov 2012
Generation
Tesla
Tesla
Type
Desktop
Professional
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1305 MHz
—
Boost Clock
1740 MHz
—
Memory Clock
1812 MHz
1300 MHz
Memory
Memory Size
48GB
6GB
Memory Type
GDDR6
GDDR5
Memory Bus
384bit
384bit
Bandwidth
695.8GB/s
249.6GB/s
Render Config
SM Count
84
—
Shading Units
10752
2688
TMUs
336
224
ROPs
112
48
Tensor Cores
336
—
RT Cores
84
—
L1 Cache
128 KB (per SM)
16 KB (per SMX)
L2 Cache
6 MB
1536 KB
Theoretical Performance
Pixel Rate
194.9 GPixel/s
40.99 GPixel/s
Texture Rate
584.6 GTexel/s
164.0 GTexel/s
FP16 (half)
37.42 TFLOPS
—
FP32 (float)
37.42 TFLOPS
3.935 TFLOPS
FP64 (double)
584.6 GFLOPS
1312 GFLOPS
Graphics Processor
GPU Name
GA102
GK110
Architecture
Ampere
Kepler
Foundry
Samsung
TSMC
Process Size
8 nm
28 nm
Transistors
28.3 billion
7.08 billion
Die Size
628 mm²
561 mm²
Board Design
TDP
300W
235W
Suggested PSU
700 W
550 W
Outputs
3x DisplayPort 1.4a
No outputs
Power Connectors
8-pin EPS
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_0)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.3
1.1
CUDA
8.6
3.5
Shader Model
6.6
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.