This is not a problem. You are trying to use the Inspiron 5680 in a way that was never designed or sold.
The Inspiron 5680 was never designed to use XMP memory or to allow users to customize the BIOS.
The Inspiron 5680 sales site never mentions XMP memory. It shows DDR4 2666MHz and DDR4 2400MHz. Nor does it mention overclocking.
The online Inspiron Gaming Desktop Setup and Specifications PDF clearly shows on page 20 =
Configurations supported =
8GB Single Channel DDR4 2400MHz/2666MHz (1x8GB)
* 16GB Single Channel DDR4 2666MHz (1x16GB) (Not tested by Dell but Forum customers say it works)
16GB Dual Channel DDR4 2400MHz/2666MHz (2x8GB)
* 32GB Dual Channel DDR4 2400MHz/2666MHz (4x8GB) (Not tested by Dell but Forum customers say it works)
32GB Dual Channel DDR4 2666MHz (2x16GB)
64GB Dual Channel DDR4 2666MHz (4x16GB)
Dell OEM memory sticks =
TP9W1 16GB,2666MHz,2RX8,DDR4,1Gx72,8K,288pin,2Rx8,Dual Rank,Unbuffered,1.2v,Non-ECC
Y7N41 8GB,2666MHz,1RX8,DDR4,1Gx64,8K,288pin,1Rx8,Single Rank,Unbuffered,1.2v,Non-ECC
M0VW4 8GB,2400MHz,1RX8,DDR4,1Gx64,8K,288pin,1GBx8,Single Rank,Unbuffered,1.2v,Non-ECC
That's a bummer. I was hoping to work around it by buying ram that runs at 2666mhz at JEDEC (SPD), eliminating the problem of unusable xmp specs. This was for a 5676 which only states supported speeds of 2400 in dells documentation but according to dells own forums here it does still support 2666 speeds. sounds like that may not be possible though. I'm also happy with my dell but being unable to alter the bios simply to increase ram speed for a specifically stated gaming PC is pretty darn frustrating. Just gotta hope it doesn't downclock it to 2133mhz once it arrives. Thank you for the reply though!
That PC is more oriented to gaming and not memory, always do your homework before buying any extras for any computer.
Forum Member since 2004
I am not a Dell employee
"Dell speaks, 2666mhz is unachievable. "
Where does Dell say that? Dell-Chris M's post says (in green) that Dell tested and validated Dual Channel DDR4 at 2400MHz/2666MHz.
That means the RAM they tested will work at those speeds. Obviously, Dell can't test every manufacturer's RAM in every PC model and RAM is not all made to the same specs. So when you throw in some brand of RAM that Dell didn't test, it may -or not- work at the desired speed.
So who's fault is that? If you wanted RAM that was validated to work at 2666 MHZ in this PC, you should have purchased it from Dell, or gotten a warranty from whichever brand you bought that it would run at 2666 MHz in this specific PC model or they'd take it back.
Besides, I doubt you'd even notice any difference in performance with 2400 vs 2666 MHz RAM.
I agree, they wouldn't notice any difference
"That PC is more oriented to gaming and not memory, always do your homework before buying any extras for any computer."
For someone giving advice, it's YOU that should do your homework! Guess what industry high-speed memory is targeted at? It's the GAMING PC industry. If you even looked a little, you'd find all the fancy RGB/High-speed memory modules are for GAMERS. The Dell 5680 is -- a GAMING PC. Dell says so right on the product page.
So it isn't a stretch of the imagination that a GAMING PC might support XMP. Or that it even SHOULD support XMP, except that then Dell would be taking away from their overpriced Alienware line, which does support XMP.
GAMING=MEMORY. That's a tip for you.
What is even more unfortunate is that getting some memory modules and wanting them to run at 2666 is even impossible on this 5680 because it requires XMP! Else the module defaults to some ridiculously slow 2133. It's the module manufacturers that need to be clearer what speeds their modules run at when they advertise a certain speed, it should run at that speed for everyone.