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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. [1] 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 ...
The V Series laptops released by Lenovo in 2011 were the V370, V470 and V570. [21] The 2011 Lenovo V Series laptops offered screen sizes of 13.3 inches, 14 inches, and 15.6 inches respectively, with maximum resolutions of 1366x768 pixels. [21] The laptops could be equipped with up to Intel Core i7 processors and up to 8GB of RAM. [21]
Blinkenlights on the NSA's FROSTBURG supercomputer from the 1990s Typical LED pattern of a Thinking Machines CM-5. The Connection Machine, a 65 536-processor parallel computer designed in the mid-1980s, was a black cube with one side covered with a grid of red blinkenlights; the sales demo had them evolving Conway's Game of Life patterns.
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
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
The Power Good signal (power-good) is a signal provided by a computer power supply to indicate to the motherboard that all of the voltages are within specification and that the system may proceed to boot and operate.
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 The ThinkLight has been replaced by a backlight keyboard on later generations of ThinkPads, and Lenovo has discontinued the ThinkLight in 2013.
Computer systems such as laptops often produce large amounts of heat which must be dissipated. This is typically done by activating a fan to blow air over the components that are producing heat; the fan is not simply turned on or off, but is driven at high speed by the embedded controller for a short time and then left running at low speed ...