NVIDIA Tesla K20c vs NVIDIA Tesla M40
We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 12GB VRAM Tesla M40 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 250W)
NVIDIA Tesla M40 's Advantages
Released 3 years late
Boost Clock1112MHz
More VRAM (12GB vs 5GB)
Larger VRAM bandwidth (288.4GB/s vs 208.0GB/s)
576 additional rendering cores
Score
Benchmark
FP32 (float)
Tesla K20c
3.524 TFLOPS
Tesla M40
+93%
6.832 TFLOPS
OctaneBench
Tesla K20c
55
Tesla M40
+123%
123
Graphics Card
Nov 2012
Release Date
Nov 2015
Tesla
Generation
Tesla Maxwell
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
948 MHz
-
Boost Clock
1112 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
3072
208
TMUs
192
40
ROPs
96
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
48 KB (per SMM)
1280 KB
L2 Cache
3 MB
-
-
-
Theoretical Performance
36.71 GPixel/s
Pixel Rate
106.8 GPixel/s
146.8 GTexel/s
Texture Rate
213.5 GTexel/s
-
-
-
3.524 TFLOPS
FP32 (float)
6.832 TFLOPS
1175 GFLOPS
FP64 (double)
213.5 GFLOPS
Board Design
225W
TDP
250W
550 W
Suggested PSU
600 W
No outputs
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
8-pin EPS
Graphics Processor
GK110
GPU Name
GM200
GK110-885-KA-A1
GPU Variant
GM200-895-A1
Kepler
Architecture
Maxwell 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
8 billion
561 mm²
Die Size
601 mm²
Graphics Features
12 (11_0)
DirectX
12 (12_1)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.3
3.5
CUDA
5.2
5.1
Shader Model
6.7
