NEED HELP: CT8G4DFS8266 SPD (jedec) Speed vs XMP

Kilobyte Kid

NEED HELP: CT8G4DFS8266 SPD (jedec) Speed vs XMP

I've bought a Dell 5676 Inspiron Gaming Desktop with an AMD 2700x CPU and promontory x370 motherboard recently. I'm looking to upgrade the ram and it states supported speed is 2400, however, the motherboard supports speeds of 2666 and I've heard people confirm reaching these speeds for this PC on forums. This appears to only be the case for SPD set speeds of 2666 as XMP apparently can't be enabled using dell BIOS.


The ram in question is a Crucible 8GB (1x 8GB) DDR4 2666MHz - Model Number: CT8G4DFS8266


My questions were: - Does this ram have a speed of 2666 SPD? Or is this XMP advertised speed. - If it is XMP advertised speed, what is the SPD speed?


Thank you in advance. 

1 Reply
Crucial Employee

Re: NEED HELP: CT8G4DFS8266 SPD (jedec) Speed vs XMP

If the board doesn't support XMP you will not get XMP speeds on the Ballistix parts. Crucial memory in comparison (not Ballistix) does not use XMP profiles, it uses standard JEDEC speeds. Provided the AMD CPU can run the Crucial parts at 2666 is should without any issue, otherwise it may force the memory to downclock and run at 2400, which is perfectly fine, since the memory is designed to do that. 

Crucial_Benny, Micron CPG Support, US

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