Browse Definitions :
Definition

serial presence detect (SPD)

When a computer is booted (started), serial presence detect (SPD) is information stored in an electrically erasable programmable read-only memory (EEPROM) chip on a synchronous dynamic random access memory (SDRAM) memory module that tells the basic input/output system (BIOS) the module's size, data width, speed, and voltage. 

The BIOS uses this information to configure the memory properly for maximum reliability and performance. If a memory module does not have SPD, the BIOS assumes the memory module's information. With some memory, this does not cause problems. But SDRAM memory has to have SPD or the computer may not boot at all. If it does boot, the assumed information may cause fatal exception errors

Before SPD, memory chips were identified with parallel presence detect (PPD). PPD used a separate pin for each bit of information,which meant that only the speed and density of the memory module could be stored because of the limited space for pins. The EEPROM chip on an SPD memory module only requires two pins so more information can be stored.

This was last updated in July 2015

Continue Reading About serial presence detect (SPD)

Networking
  • network traffic

    Network traffic is the amount of data that moves across a network during any given time.

  • dynamic and static

    In general, dynamic means 'energetic, capable of action and/or change, or forceful,' while static means 'stationary or fixed.'

  • MAC address (media access control address)

    A MAC address (media access control address) is a 12-digit hexadecimal number assigned to each device connected to the network.

Security
  • security information and event management (SIEM)

    Security information and event management (SIEM) is an approach to security management that combines security information ...

  • Evil Corp

    Evil Corp is an international cybercrime network that uses malicious software to steal money from victims' bank accounts and to ...

  • Trojan horse

    In computing, a Trojan horse is a program downloaded and installed on a computer that appears harmless, but is, in fact, ...

CIO
  • green IT (green information technology)

    Green IT (green information technology) is the practice of creating and using environmentally sustainable computing.

  • benchmark

    A benchmark is a standard or point of reference people can use to measure something else.

  • spatial computing

    Spatial computing broadly characterizes the processes and tools used to capture, process and interact with 3D data.

HRSoftware
  • employee self-service (ESS)

    Employee self-service (ESS) is a widely used human resources technology that enables employees to perform many job-related ...

  • learning experience platform (LXP)

    A learning experience platform (LXP) is an AI-driven peer learning experience platform delivered using software as a service (...

  • talent acquisition

    Talent acquisition is the strategic process employers use to analyze their long-term talent needs in the context of business ...

Customer Experience
  • BOPIS (buy online, pick up in-store)

    BOPIS (buy online, pick up in-store) is a business model that allows consumers to shop and place orders online and then pick up ...

  • real-time analytics

    Real-time analytics is the use of data and related resources for analysis as soon as it enters the system.

  • database marketing

    Database marketing is a systematic approach to the gathering, consolidation and processing of consumer data.

Close