About the 2666 DDR4 RAM can run Mobo with 2400 speed?

[Emski89]

Hello again guys,

 

I am now selling my 2 x 4gb Delta RGB ram, 2666 - it's been used for a month... because I'm planing to buy the 2 x 8 gb kit instead.

 

Since most of the mobo's here in my Country or the standard they say is 2400. And my friend told me that I mustn't post this:

 

"-IF INTERESTED, PLEASE CHECK YOUR MOTHERBOARDS IF IT SUPPORTS 2666 MHz SPEED OF RAM, MOSTLY MOBO'S ONLY SUPPORT UP TO 2400 SPEED!
-MAKE SURE IT IS COMPATIBLE IN YOUR MOTHERBOARD"

 

I mean is this a right statement? 'Coz he said that any ram speed is compatible with any mobo even if it just up to 2400, the mobo will adjust the speed along the way, even if the mobo has a max of 2400 ram speed, does it support 2666 speed or more despite the mobo can go only 2400 max? Will it not cost any problems?

 

Should I just say "IT IS COMPATIBLE TO ANY MOBO EVEN AT 2400 SINCE THE MOBO WILL ADJUST OR DOWNSPEED ITS RAM SPEED TO 2400" ... like that ?

 

@Spotty @-rascal- @Code.016

 

Thanks

 

[Spotty]

Advertise it as what it is; 2666mhz memory.

If you're concerned people are going to try to refund it add "please check compatibility with your motherboard before purchasing."

[mariushm]

Memory sticks will run at frequencies lower than what's written on them.

 

In fact, all memory sticks MUST run at standard JEDEC frequencies like 1866 Mhz, 2133 Mhz and 2400 Mhz - memory chips used on the memory sticks are tested at those frequencies before being sold to the companies which manufacture the memory sticks and further test the chips to see if they work well at higher frequencies.

 

Use a software like CPU-Z and click on the SPD tab and you'll see there all the profiles stored inside the memory sticks, those tell the motherboard what frequencies + timings the memory stick supports.

 

You can say something like this:  

 

These memory sticks were designed and guaranteed by manufacturer to work perfectly at 2666 Mhz. If your motherboard does not support this frequency, the memory sticks will be configured automatically by your motherboard to run at a lower frequency (2400 Mhz or 2133 Mhz) and they will function perfectly.

 

Try your best not to use ALL CAPS in your messages, some people are annoyed by such things.

[Jurrunio]

It will only go as fast as the board supports (unless it supports OC, like Z170).

[LukeSavenije]

some mobos are limited to 2400 mhz. some cpus are too. 7th gen and lower for example ciuld only run up to 2400 mhz natively. 8th and 9th gen only up to 2666. but overclocking and xmp exist. that makes it possible to run ram at 2666, 3000 or even higher

[-rascal-]

If this is with your i3-8100 and Gigabyte Z370M-DS3H, then you should be okay.

The motherboard can support DDR4-2666 and above.

 

I am not too familiar with the i3-8100, though -- or locked Intel CPUs.

Not too sure if the i3-8100 supports XMP beyond the DDR4-2400 spec ... hopefully somebody else on the forums can confirm.

1. IF the i3-8100 is only limited to DDR4-2400, then you RAM will run at 2400
2. IF the i3-8100 can go beyond DDR4-2400, then it should be able to run at 2666.

DDR4 RAM will run at JEDEC DDR4-2133 speed at stock / default.

The RAM manufacturer has tested the RAM kit to work up to DDR4-2666.

[Emski89]

Thanks for all the replies. It really helped.