NVIDIA Tesla K20s vs NVIDIA Tesla K20X
We compared two Professional market GPUs: 5GB VRAM Tesla K20s and 6GB VRAM Tesla K20X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA Tesla K20s 's Advantages
Lower TDP (225W vs 235W)
NVIDIA Tesla K20X 's Advantages
More VRAM (6GB vs 5GB)
Larger VRAM bandwidth (249.6GB/s vs 208.0GB/s)
192 additional rendering cores
Score
Benchmark
FP32 (float)
Tesla K20s
2.87 TFLOPS
Tesla K20X
+37%
3.935 TFLOPS
Graphics Card
Feb 2013
Release Date
Nov 2012
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
1300 MHz
Memory Clock
1300 MHz
Memory
5GB
Memory Size
6GB
GDDR5
Memory Type
GDDR5
320bit
Memory Bus
384bit
208.0GB/s
Bandwidth
249.6GB/s
Render Config
-
-
-
-
-
-
2496
Shading Units
2688
208
TMUs
224
40
ROPs
48
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1280 KB
L2 Cache
1536 KB
-
-
-
Theoretical Performance
29.90 GPixel/s
Pixel Rate
40.99 GPixel/s
119.6 GTexel/s
Texture Rate
164.0 GTexel/s
-
-
-
2.870 TFLOPS
FP32 (float)
3.935 TFLOPS
956.8 GFLOPS
FP64 (double)
1312 GFLOPS
Board Design
225W
TDP
235W
550 W
Suggested PSU
550 W
No outputs
Outputs
No outputs
-
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
GK110
GPU Name
GK110
-
-
-
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
7.08 billion
561 mm²
Die Size
561 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.5
5.1
Shader Model
5.1
