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GPU Comparison
NVIDIA Tesla K40c vs NVIDIA Tesla K20c
NVIDIA Tesla K40c vs NVIDIA Tesla K20c
VS
NVIDIA Tesla K40c
NVIDIA Tesla K20c
We compared two Professional market GPUs: 12GB VRAM Tesla K40c and 5GB VRAM Tesla K20c to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA Tesla K40c 's Advantages
Released 11 months late
Boost Clock876MHz
More VRAM (12GB vs 5GB)
Larger VRAM bandwidth (288.4GB/s vs 208.0GB/s)
384 additional rendering cores
NVIDIA Tesla K20c 's Advantages
Lower TDP (225W vs 245W)
Score
Benchmark
FP32 (float)
Tesla K40c
+43%
5.046 TFLOPS
Tesla K20c
3.524 TFLOPS
Tesla K40c
VS
Tesla K20c
Graphics Card
Oct 2013
Release Date
Nov 2012
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
745 MHz
Base Clock
-
876 MHz
Boost Clock
-
1502 MHz
Memory Clock
1300 MHz
Memory
12GB
Memory Size
5GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
320bit
288.4GB/s
Bandwidth
208.0GB/s
Render Config
-
SM Count
-
-
Compute Units
-
2880
Shading Units
2496
240
TMUs
208
48
ROPs
40
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1536 KB
L2 Cache
1280 KB
Theoretical Performance
52.56 GPixel/s
Pixel Rate
36.71 GPixel/s
210.2 GTexel/s
Texture Rate
146.8 GTexel/s
-
FP16 (half)
-
5.046 TFLOPS
FP32 (float)
3.524 TFLOPS
1.682 TFLOPS
FP64 (double)
1175 GFLOPS
Graphics Processor
GK180
GPU Name
GK110
GK180-890-A1
GPU Variant
GK110-885-KA-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
Board Design
245W
TDP
225W
550 W
Suggested PSU
550 W
No outputs
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
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
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