what is JEDEC?

[come on man]

hello,can someone tell me what's JEDEC?everywhere ppl are talking about JEDEC as some semiconductor technology...but what's its purpose?what does it do?I understand it's a semiconductor,but what does it do?

[Sakkura]

JEDEC is the organization that publishes the standards for memory technologies.

 

In some cases people use JEDEC to refer to a set of predetermined memory speed settings that can be applied in BIOS.

[come on man]

8 minutes ago, Sakkura said:

people use JEDEC to refer to a set of predetermined memory speed settings that can be applied in BIOS.

u mean for example I have mobo which supports 3200mhz,my cpu supports 2666.i go to bios and i use the d.o.c profile for 3200mhz RAM?because by default i will use 2666mhz out of my 3200mhz ram,because the cpu supports only 2666mhz

[porina]

JEDEC is an industry body that sets the standard ram speeds and timings. No more, no less. It doesn't dictate what the CPU supports, although the CPU will officially support some speeds, not necessarily all of them. It also doesn't dictate what the ram supports, again the ram will have certain standard speeds and timings in it. DOCP or XMP are extensions to that, outside of JEDEC. It is basically overclocking, even if the case where some of those speeds or timings might be similar to actual standards.

 

Generally speaking the CPU will operate ram outside the CPU officially supported speeds, but there is no guarantee it will work.

[Jurrunio]

6 minutes ago, come on man said:

u mean for example I have mobo which supports 3200mhz,my cpu supports 2666.i go to bios and i use the d.o.c profile for 3200mhz RAM?because by default i will use 2666mhz out of my 3200mhz ram,because the cpu supports only 2666mhz

no, JEDEC only sets the minimum standard for memory, say DDR3-1600 must be capable of 11-11-11-28 timings at 1.5V at the very least. It's up to the CPU manufacturer to draw the line between supported memory frequency and overclocked memory frequency

[Sakkura]

7 minutes ago, come on man said:

u mean for example I have mobo which supports 3200mhz,my cpu supports 2666.i go to bios and i use the d.o.c profile for 3200mhz RAM?because by default i will use 2666mhz out of my 3200mhz ram,because the cpu supports only 2666mhz

When first installed, the memory will likely default to 2133 with timings specified by JEDEC. This is to ensure that it would work regardless of what system you put the memory in.

 

Then you can apply DOCP or XMP profiles to run the memory at higher speeds. 2666 is probably just what the CPU is officially guaranteed to work with, it may handle 3200 just fine.