Trufflette,
ALl of these have been addressed in R. Chaplinsky's three-part analysis (ever looked at them?)
"Double Data Rate (DDR) DRAM. Several members of the SyncLink consortium, including Fujitsu LTD., Samsung CO Ltd., and Hitachi LTD., and at least five other supliers are backing an interim technology solution--called Double Data Rate (DDR) DRAM--before SyncLink is ready. DDR DRAM doubles the chip bandwidth without increasing the frequency by reading or writing 2 bits of data in one clock cycle, which will enable them to run at 100 MHz but send data out at 200 MHz. The first DDR DRAMs are expected to be released in 1998. It is an open standard, so that the memory suppliers do not have to pay royalties.
Although sources claim that the DDR DRAMs will be able to offer peakbandwidth of 1.6 GB per second, we believe the actual sustained bandwidth will be less since it is still based on the same limitations of the SDRAM architecture. Therefore, we believe that by the time it could hit mass production, its sustained bandwidth will not meet the requirements of the PC. It is for this reason that we believe Intel did not consider it for its next-generation platform achitecture.
MultiBank DRAMs (MDDRAMs). Startup company MoSys has developed a memory architecture, called MultiBank DRAMs (MDRAMs), which consists of small independent 256 KB banks of DRAM on a single chip, which the company claims deliver a peak bandwidth of 660 MB per second wth 15 nanoseconds or less of access time. One key benefit of the MultiBank DRAM is the granular architecture, which lets one produce custom size memory solutions so that graphic cards producers can buy only the memory they need for a given resolution rather than having to buy more DRAM than the resolution requires. However, it is still a memory chip solution only and does not improve overall system-level bandwidth.
3D Memory. The is the Mitsubishi proprietary desig targeted for graphics applications. Siemens has already announced foundry support for thisarchitecture.
Windows RAM (WRAM). This is similar to VRAM but has only been developed by a small number of suppliers.
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Trufflette, please check old posts on thread first, you will get the answers more quickly. We have covered just about all grounds.
Ibexx
PS: other 2 relevant posts:
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