Tesla K80 vs Tesla K20c
We compared two Professional market GPUs: 12GB VRAM Tesla K80 and 5GB VRAM Tesla K20c to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
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)
Tesla K20c 's Advantages
Lower TDP (225W vs 300W)
Score
Benchmark
FP32 (float)
Tesla K80
+16%
4113
Tesla K20c
3524
OctaneBench
Tesla K80
+12%
62
Tesla K20c
55
Graphics Card
Nov 2014
Release Date
Nov 2012
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
562 MHz
Base Clock
-
824 MHz
Boost Clock
-
1253 MHz
Memory Clock
1300 MHz
Memory
12GB
Memory Size
5GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
320bit
240.6GB/s
Bandwidth
208.0GB/s
Render Config
2496
Shading Units
2496
208
TMUs
208
48
ROPs
40
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1536 KB
L2 Cache
1280 KB
Theoretical Performance
42.85 GPixel/s
Pixel Rate
36.71 GPixel/s
171.4 GTexel/s
Texture Rate
146.8 GTexel/s
4.113 TFLOPS
FP32 (float)
3.524 TFLOPS
1371 GFLOPS
FP64 (double)
1175 GFLOPS
Board Design
300W
TDP
225W
700 W
Suggested PSU
550 W
No outputs
Outputs
No outputs
1x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
GK210
GPU Name
GK110
GK210-885-A1
GPU Variant
GK110-885-KA-A1
Kepler 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.1 billion
Transistors
7.08 billion
561 mm²
Die Size
561 mm²
Graphics Features
12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.7
CUDA
3.5
5.1
Shader Model
5.1
