Serial presence detect Serial presence detect In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module. Earlier 72-pin SIMMs included five pins that provided five bits of "parallel presence detect" (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode much more information. When an ordinary modern computer is turned on, it starts by doing a power-on self-test (POST). Since about the mid-1990s, this process includes automatically configuring the hardware currently present. SPD is a memory hardware feature that makes it possible for the computer to know what memory is
Serial killer debut at an early age and it can be an opportunity for researchers to study what factors brought about the behavior. Though it is rare, the youngest felon on death row is in fact, a juvenile serial killer named Harvey Miguel Robinson. The racial demographics regarding serial killers are often subject to debate. In the United States, the majority of reported and investigated serial killers are white males, from a lower-to-middle-class background, usually in their late 20s to early 30s. However, there are African American, Asian, and Hispanic (of any race) serial killers as well, and, according to the FBI,