Nvidia TESLA K20 User manual

BD-06455-001_v05 | November 2012
Board Specification
TESLA K20 GPU ACCELERATOR

Tesla K20 GPU Accelerator BD-06455-001_v05 | ii
DOCUMENT CHANGE HISTORY
BD-06455-001_v05
Version Date Authors Description of Change
01 August 1, 2012 GG, SM Preliminary Information (Information contained
within this document is subject to change)
02 September 6, 2012 GG, SM •Updated “Key Features” section
•Updated Figure 1
•Updated Table 1
•Updated “Standard I/O Connector Placement”
section
03 September 7, 2012 GG, SM •
Updated Table 4
•General edits throughout this specification
04 October 9, 2012 GG, SM
•Changed Gen3 to Gen2
•Updated block diagram (Figure 1)
•Added memory bandwidth
•Changed idle power to 25 W
05 November 9, 2012 GG, SM
•Removed “Preliminary Information” from
document as this board specification is now final
•Removed “NVIDIA Confidential” from document
•Updated package size
•Updated block diagram (Figure 1)

Tesla K20 GPU Accelerator BD-06455-001_v05 | iii
TABLE OF CONTENTS
Overview ........................................................................................... 1
Key Features..................................................................................... 1
Tesla K20 Block Diagram....................................................................... 2
Configuration .................................................................................... 3
Mechanical Specifications....................................................................... 4
PCI Express System ............................................................................. 4
Tesla K20 Bracket............................................................................... 5
Power Connectors............................................................................... 6
Power Specifications............................................................................. 9
Support Information.............................................................................10
Certificates and Agencies.....................................................................10
Agencies......................................................................................10
Languages.......................................................................................11

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LIST OF FIGURES
Figure 1. Tesla K20 Block Diagram ............................................................ 2
Figure 2. Tesla K20 GPU Accelerator.......................................................... 4
Figure 3. Tesla K20 Bracket .................................................................... 5
Figure 4. 6-Pin PCI Express Power Connector................................................ 6
Figure 5. 8-Pin PCI Express Power Connector................................................ 7
LIST OF TABLES
Table 1. Board Configuration.................................................................. 3
Table 2. 6-Pin PCI Express Power Connector Pinout ....................................... 8
Table 3. 8-Pin PCI Express Power Connector Pinout ....................................... 8
Table 4. Auxiliary Power Connectors......................................................... 9
Table 5. Languages Supported ...............................................................11

Tesla K20 GPU Accelerator BD-06455-001_v05 | 1
OVERVIEW
The NVIDIA®Tesla®K20 graphics processing unit (GPU) accelerator is a PCI Express,
dual-slot full height (4.376 inches by 10.5 inches by 1.52 inches) form factor computing
module comprising of a single GK110 GPU. The Tesla K20 is designed for servers and
offers a total of 5 GB of GDDR5 on-board memory and supports PCI Express Gen2.
The Tesla K20 can be configured by the OEM or by the end user to enable or disable
ECC or error correcting codes that can fix single-bit errors and detect double-bit errors.
Enabling ECC will cause some of the memory to be used for the ECC bits, so the user
available memory will decrease by 10%. On the Tesla K20, the register files, cache, and
DRAM are ECC protected.
KEY FEATURES
GPU
Number of processor cores: 2496
Processor core clock: 706 MHz
Package size: 45 mm × 45 mm 2397-pin ball grid array (S-FCBGA)
Board
PCI Express Gen2 ×16 system interface
Physical dimensions: 4.376 inches × 10.5 inches, dual-slot
Display Connectors
None

Overview
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Power Connectors
One 6-pin PCI Express power connector
One 8-pin PCI Express power connector
Memory
Memory clock: 2.6 GHz
Memory bandwidth: 208 GB/sec
Interface: 320-bit
●Total board memory: 5 GB
●20 pieces of 64M × 16 GDDR5, SDRAM
BIOS
2Mbit Serial ROM
TESLA K20 BLOCK DIAGRAM
Figure 1 is the block diagram for the Tesla K20 GPU dual-slot computing processor
module.
Figure 1. Tesla K20 Block Diagram

Overview
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CONFIGURATION
The Tesla K20 board is available in the following configuration (Table 1).
Table 1. Board Configuration
Specifications Tesla K20
Generic SKU reference 699-22081-0208-xxxx
Chip GK110
Package size GPU 45 mm × 45 mm 2397-pin S-FCBGA
Processor clock 706 MHz
Memory clock 2.6 GHz
Memory size 5 GB
Memory I/O 320-bit GDDR5
Memory configuration 20 pieces of 64M ×16 GDDR5 SDRAM
Display connectors None
Power connectors •
8-pin PCI Express power connector
•6-pin PCI Express power connector
Board power 225 W
Idle power 25 W
Thermal cooling solution Passive heat sink

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MECHANICAL SPECIFICATIONS
PCI EXPRESS SYSTEM
The Tesla K20 board (Figure 2) conforms to the PCI Express full height (4.376 inches by
10.5 inches) form factor.
Figure 2. Tesla K20 GPU Accelerator

Note: The final product will ship with shroud.
10.5 inches
4.376 inches

Mechanical Specifications
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TESLA K20 BRACKET
As shown in Figure 3, the Tesla K20 includes a vented bracket. If you are an OEM who
qualifies for bracket modifications, you have the option of receiving your module with
no bracket installed.
Figure 3. Tesla K20 Bracket

Mechanical Specifications
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POWER CONNECTORS
The Tesla K20 GPU accelerator is a performance optimized, high-end product and uses
power from the PCI Express connector as well as external power connectors.
Figure 4 and Figure 5 show the specifications and Table 2 and Table 3 show the pinouts
for the 6-pin and 8-pin PCI Express power connectors.
Figure 4. 6-Pin PCI Express Power Connector

Mechanical Specifications
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Figure 5. 8-Pin PCI Express Power Connector

Mechanical Specifications
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Table 2. 6-Pin PCI Express Power Connector Pinout
Pin Number Description
1 +12 V
2 +12 V
3 +12 V
4 GND
5 Sense
6 GND
Table 3. 8-Pin PCI Express Power Connector Pinout
Pin Number Description
1 +12 V
2 +12 V
3 +12 V
4 Sense1
5 GND
6 Sense0
7 GND
8 GND

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POWER SPECIFICATIONS
The Tesla K20 GPU accelerator requires power from the PCI Express connector as well
as one or two auxiliary power connectors.
Table 4. Auxiliary Power Connectors
8-Pin Header 6-Pin Header Support Notes
Connect 8-pin cable Connect 6-pin cable Yes
Connect 8-pin cable No cable installed Yes 8-pin cable must supply
150 W
Connect 6-pin cable Connect 6-pin cable No 8-pin connector should
always be connected

Note: Detailed information about power draw by rail will be available to
authorized system partners in the Tesla K20 System Design Guide.

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SUPPORT INFORMATION
CERTIFICATES AND AGENCIES
Agencies
Australian Communications Authority and Radio Spectrum Management Group of
New Zealand (C-Tick)
Bureau of Standards, Metrology, and Inspection (BSMI)
Conformité Européenne (CE)
Federal Communications Commission (FCC)
Industry Canada - Interference-Causing Equipment Standard (ICES)
Korean Communications Commission (KCC)
Underwriters Laboratories (cUL)
Voluntary Control Council for Interference (VCCI)

Support Information
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LANGUAGES
Table 5. Languages Supported
Windows Server
2008 and Windows
Server 2008 R2
Linux
English (US) X X
English (UK) X
Arabic X
Chinese, Simplified X
Chinese, Traditional X
Danish X
Dutch X
Finnish X
French X
French (Canada) X
German X
Italian X
Japanese X
Korean X
Norwegian x
Portuguese (Brazil) X
Russian X
Spanish X
Spanish (Latin America) X
Swedish X
Thai X
Note: NVIDIA’s CUDA™ software is only supported in English (U.S.)

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