De gasten van Tresh's FiringSquad hebben een mooi artikeltje in elkaar geknutseld over het hoe en wat van geheugen (nee, niet het goed ontwikkelde deel in het hoofd van de gemiddelde tweaker - ik bedoel die stuff in je computer). In een goed volgbaar verhaal worden de verschillen uitgelegd tussen RAM, ROM, FlashRAM, etc. en worden allerlei termen en weetjes aan het licht gebracht. Een lang verhaal, maar wel de moeite waard om te lezen. Hieronder een stukje over de opkomst van 32-bit besturingssystemen:
With the release of Windows 95, something new truly occurred in consumer computing. The Intel 386, the first 32-bit processor had been released nearly 10 years earlier, and it took that long to develop a true, mainstream 32-bit protected mode operating system that was able to harness the power of that processor, and fully exploit the RAM. Up until this point, only specific software programs took advantage of protected mode, including some of the more advanced games of the time. Long time users will remember a small program called "DOS4GW.EXE", this program was responsible for switching the processor to protected mode operation while maintaining all current real mode operations, then when the application finished running, the system could switch back to real mode operation.[break]En nog een stukje over het ons aller bekende DDR SDRAM:[/break]DDR SDRAM is a new hit on the market, so new in fact that we have yet to see mainboards that can support the use of DDR SDRAM as main memory. Up until this point, all memories and system buses have used single rate clocking to transfer data. There are three segments of a clock cycle: the rising edge, the level, and the falling edge. Current single data rate memory uses only the rising edge of the pulse to transfer data because the system is not able to transition fast enough to reliably use both edges of the pulse to transfer data. In DDR memory, both the rising and falling edge of the pulse is used to transfer information. This gives us an effective doubling of bandwidth available. With single data rate memory, the only way we would have achieved that same level of bandwidth improvement would have been to double the clock frequency of the memory. This means that 100Mhz of DDR memory is as effective as 200Mhz of SDR memory. This translates into another quantum leap in memory speeds, since we have not only sped up the memory, but also DOUBLED its speed! Normally, improvements in technology are made in small leaps, so a doubling of memory bandwidth can be accurately stated as being a most excellent improvement. DDR SDRAM has already found its way into the newest generation of graphics accelerators, most notably on video cards based on NVIDIA's GeForce 256 GPU unit, and will soon be supported for use as main system memory.