Toshiba og Hynix går sammen om MRAM-udvikling

http://en.wikipedia.org/wiki/Magnetoresistive_random_access_memory#Power_consumption skrev:

Since the capacitors used in DRAM lose their charge over time, memory assemblies using them must periodically refresh all the cells in their chips approximately 20 times a second, reading each one and re-writing its contents. This demands a constant power supply, which is why DRAM loses its memory when power is turned off on the computer. As DRAM cells decrease in size, the refresh cycles become shorter, and the power draw more continuous.

In contrast, MRAM requires no refresh at any time. Not only does this mean it retains its memory with the power turned off, but also that there is no constant power draw. While the read process theoretically requires more power than the same process in a DRAM, in practice the difference appears to be very close to zero. However, the write process requires more power in order to overcome the existing field stored in the junction, varying from three to eight times the power required during reading.[7][8] Although the exact amount of power savings depends on the nature of the work – more frequent writing will require more power – in general MRAM proponents expect much lower power consumption (up to 99% less) compared to DRAM. STT-based MRAMs eliminate the difference between reading and writing, further reducing power requirements.

It is also worth comparing MRAM with another common memory system, flash RAM. Like MRAM, flash does not lose its memory when power is removed, which makes it very common as a "hard disk replacement" in small devices such as digital audio players or digital cameras. When used for reading, flash and MRAM are very similar in power requirements. However, flash is re-written using a large pulse of voltage (about 10 V) that is stored up over time in a charge pump, which is both power-hungry and time consuming. Additionally the current pulse physically degrades the flash cells, which means flash can only be written to some finite number of times before it must be replaced.

In contrast, MRAM requires only slightly more power to write than read, and no change in the voltage, eliminating the need for a charge pump. This leads to much faster operation, lower power consumption, and an indefinitely long "lifetime".

Montago (2) skrev:

COOL... RAM som ikke glemmer og spare 99% strøm... det er da nice !

Thoroughbreed (3) skrev:

Montago (2) skrev:

COOL... RAM som ikke glemmer og spare 99% strøm... det er da nice !

Wall of text?...

Men kan forestille mig nogle værre problemer ved ram der ikke glemmer?..

Thoroughbreed (9) skrev:

Vil det ikke være svært at komme af med virus hvis de er lagret i rammen, og rammen ikke glemmer ved at miste strømmen?

BlackFalcon (10) skrev:

Nej. Samme princip som i dag, slet/stop virussen+tøm/overskriv RAM'en....?!

BlackFalcon (13) skrev:

alt imens man sørger for at have ekslusive rettigheder over området, så virussen ikke kan flytte sig imens.