NVIDIA Tesla K20c vs NVIDIA Tesla K20Xm

VS

We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 6GB VRAM Tesla K20Xm 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 235W)

NVIDIA Tesla K20Xm 's Advantages

More VRAM (6GB vs 5GB)

Larger VRAM bandwidth (249.6GB/s vs 208.0GB/s)

192 additional rendering cores

Score

Benchmark

FP32 (float)

Tesla K20c

3.524 TFLOPS

Tesla K20Xm +11%

3.935 TFLOPS

OctaneBench

Tesla K20c

55

Tesla K20Xm +14%

63

Tesla K20c

VS

Tesla K20Xm

Graphics Card

Nov 2012

Release Date

Nov 2012

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1300 MHz

Memory Clock

1300 MHz

Memory

5GB

Memory Size

6GB

GDDR5

Memory Type

GDDR5

320bit

Memory Bus

384bit

208.0GB/s

Bandwidth

249.6GB/s

Render Config

-

SM Count

-

Compute Units

-

2496

Shading Units

2688

208

TMUs

224

40

ROPs

48

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

1280 KB

L2 Cache

1536 KB

Theoretical Performance

36.71 GPixel/s

Pixel Rate

40.99 GPixel/s

146.8 GTexel/s

Texture Rate

164.0 GTexel/s

-

FP16 (half)

-

3.524 TFLOPS

FP32 (float)

3.935 TFLOPS

1175 GFLOPS

FP64 (double)

1312 GFLOPS

Graphics Processor

GK110

GPU Name

GK110

GK110-885-KA-A1

GPU Variant

-

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

225W

TDP

235W

550 W

Suggested PSU

550 W

No outputs

Outputs

No outputs

1x 6-pin + 1x 8-pin

Power Connectors

-

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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