NVIDIA Tesla K20c vs NVIDIA Tesla K80
We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 12GB VRAM Tesla K80 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA Tesla K20c 's Advantages
Lower TDP (225W vs 300W)
NVIDIA Tesla K80 's Advantages
Released 2 years late
Boost Clock824MHz
More VRAM (12GB vs 5GB)
Larger VRAM bandwidth (240.6GB/s vs 208.0GB/s)
Score
Benchmark
FP32 (float)
Tesla K20c
3.524 TFLOPS
Tesla K80
+16%
4.113 TFLOPS
OctaneBench
Tesla K20c
55
Tesla K80
+12%
62
Graphics Card
Nov 2012
Release Date
Nov 2014
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
562 MHz
-
Boost Clock
824 MHz
1300 MHz
Memory Clock
1253 MHz
Memory
5GB
Memory Size
12GB
GDDR5
Memory Type
GDDR5
320bit
Memory Bus
384bit
208.0GB/s
Bandwidth
240.6GB/s
Render Config
-
-
-
-
-
-
2496
Shading Units
2496
208
TMUs
208
40
ROPs
48
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1280 KB
L2 Cache
1536 KB
-
-
-
Theoretical Performance
36.71 GPixel/s
Pixel Rate
42.85 GPixel/s
146.8 GTexel/s
Texture Rate
171.4 GTexel/s
-
-
-
3.524 TFLOPS
FP32 (float)
4.113 TFLOPS
1175 GFLOPS
FP64 (double)
1371 GFLOPS
Board Design
225W
TDP
300W
550 W
Suggested PSU
700 W
No outputs
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
1x 8-pin
Graphics Processor
GK110
GPU Name
GK210
GK110-885-KA-A1
GPU Variant
GK210-885-A1
Kepler
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
7.1 billion
561 mm²
Die Size
561 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.7
5.1
Shader Model
5.1
