Tesla K20s vs Tesla K40c
We compared two Professional market GPUs: 5GB VRAM Tesla K20s and 12GB VRAM Tesla K40c to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Tesla K20s 's Advantages
Lower TDP (225W vs 245W)
Tesla K40c 's Advantages
Released 8 months late
Boost Clock876MHz
More VRAM (12GB vs 5GB)
Larger VRAM bandwidth (288.4GB/s vs 208.0GB/s)
384 additional rendering cores
Score
Benchmark
FP32 (float)
Tesla K20s
2870
Tesla K40c
+75%
5046
Graphics Card
Feb 2013
Release Date
Oct 2013
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
745 MHz
-
Boost Clock
876 MHz
1300 MHz
Memory Clock
1502 MHz
Memory
5GB
Memory Size
12GB
GDDR5
Memory Type
GDDR5
320bit
Memory Bus
384bit
208.0GB/s
Bandwidth
288.4GB/s
Render Config
2496
Shading Units
2880
208
TMUs
240
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
52.56 GPixel/s
119.6 GTexel/s
Texture Rate
210.2 GTexel/s
2.870 TFLOPS
FP32 (float)
5.046 TFLOPS
956.8 GFLOPS
FP64 (double)
1.682 TFLOPS
Board Design
225W
TDP
245W
550 W
Suggested PSU
550 W
No outputs
Outputs
No outputs
-
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
GK110
GPU Name
GK180
-
GPU Variant
GK180-890-A1
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
