NVIDIA Tesla K20X vs NVIDIA Tesla K40c
GPU Specs Compare
Graphics Card
Release Date
Nov 2012
Oct 2013
Generation
Tesla
Tesla
Type
Professional
Professional
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1300 MHz
1502 MHz
Base Clock
-
745 MHz
Boost Clock
-
876 MHz
Memory
Memory Size
6GB
12GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
384bit
Bandwidth
249.6GB/s
288.4GB/s
Render Config
Shading Units
2688
2880
TMUs
224
240
ROPs
48
48
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
1536 KB
1536 KB
Theoretical Performance
Pixel Rate
40.99 GPixel/s
52.56 GPixel/s
Texture Rate
164.0 GTexel/s
210.2 GTexel/s
FP32 (float)
3.935 TFLOPS
5.046 TFLOPS
FP64 (double)
1312 GFLOPS
1.682 TFLOPS
Graphics Processor
GPU Name
GK110
GK180
Architecture
Kepler
Kepler
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
7.08 billion
7.08 billion
Die Size
561 mm²
561 mm²
GPU Variant
-
GK180-890-A1
Board Design
TDP
235W
245W
Suggested PSU
550 W
550 W
Outputs
No outputs
No outputs
Power Connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.1
1.1
CUDA
3.5
3.5
Shader Model
5.1
5.1