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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 more information.
30-pin SIMM, 256 KB capacity Two 30-pin SIMM slots on an IBM PS/2 Model 50 motherboard. Standard sizes: 256 KB, 1 MB, 4 MB, 16 MB. 30-pin SIMMs have 12 address lines, which can provide a total of 24 address bits. With an 8-bit data width, this leads to an absolute maximum capacity of 16 MB for both parity and non-parity modules (the additional redundancy-bit chip usually doe
Released in 2011, the B570 laptop received a positive review from CNET, with the reviewer saying, “For such a modestly priced laptop, the Lenovo Essential B570 really does punch above its weight.” [18] The pros of the laptop were listed as the low price, good performance, design, and display. The only con listed by CNET was the low storage ...
Other buttons and switches (e.g., power button, laptop lid switch (received from hall sensor)) [2] Controlling access to the A20 line [ 3 ] Thermal measurement (CPU, GPU, Motherboard) and response including fan control , CPU and GPU throttling , and emergency shutdown in response to rising temperatures
72-pin SO-DIMM. There are numerous DIMM variants, employing different pin-counts: DIMM. 100-pin: printer SDRAM and printer ROM (e.g., PostScript) 168-pin: SDR SDRAM sometimes used for FPM/EDO DRAM in workstations or servers, may be 3.3 or 5 V; 184-pin: DDR SDRAM; 200-pin: FPM/EDO DRAM in some Sun workstations and servers
They are typically used to set up or configure printed circuit boards, such as the motherboards of computers. The process of setting a jumper is often called strapping. [citation needed] A strapping option is a hardware configuration setting usually sensed only during power-up or bootstrapping of a device (or even a single chip). [1]
ThinkLight was a keyboard light present on many older ThinkPad families of notebook computers. The series was originally designed by IBM , and then developed and produced by Lenovo since 2005. The ThinkLight has been replaced by a backlight keyboard on later generations of ThinkPads, and Lenovo has discontinued the ThinkLight in 2013.
One southbound frame carries 98 payload bits and 22 CRC bits. Two payload bits are a frame type, and 24 bits are a command. The remaining 72 bits may be either (depending on the frame type), 72 bits of write data, two more 24-bit commands, or one more command plus 36 bits of data to be written to an AMB control register.