Which RAM

[Atomic_Sheep]

Hi, I'm looking for some 2400 or 2666 DDR4 RAM (obviously prefer the 2666 variety) for a proposed Gigabyte H370 HD3 motherboard. Question is, the list of supported memory on the Gigabyte website has a list that is pretty much useless to me since that RAM isn't sold in Australia or is discontinued. So if I buy 2666 RAM, chances are it will work at 2133 which I don't want - why pay extra to get something you won't have. How do I go about selecting memory that will work at the rated speed out of the box?

 

[wingman99]

I believe you also need the processor to support 2666 for the memory to run at that speed without a overclocking motherboard.

 

[Atomic_Sheep]

I plan on getting an 8700 which looks to support up to 2666.

 

[wingman99]

Then any 2666 SPD Speed memory will work just fine.

Additional Notes Rated SPD frequency requires compatible CPU and chipset support

http://www.gskill.com/en/product/f4-2666c19d-16gnt Don't purchase 2666 XMP memory without JEDEC SPD 2666 speed.

 

[Atomic_Sheep]

Hmm, I didn't know XMP was overclocking the CPU as well, that's a no go, I think I'm just going to get the 2133 RAM and forget about it. If I got that straight that is i.e. without XMP enabled is just going to rub at 2133 anyway.

 

[wingman99]

I was saying not to purchase XMP memory without SPD 2666 it won't work at 2666 speed native without using XMP. Memory with JEDEC SPD 2666 speed is not overclocking it will run that speed stock. I was just saying you need to be careful picking the correct memory for 2666 speed or it will run at 2133 speed unless you use XMP up to 2666. Here is memory that will run 2666 speed stock with your PC setup list. LINK: http://www.gskill.com/en/product/f4-2666c19d-16gnt

If you have memory that you wan't to buy for 2666 post here and we can tell you if it will run at 2666 native with your PC list, without using XMP.

 

[Woomack]

It depends on the motherboard and BIOS. Some motherboards based on non-Z chipsets will have option to set 2666 memory clock. Some don't have that option and even if there is XMP then won't work at more than is in SPD.

HyperX Fury has 2666-3466 SPD profile = XMP. Recently I was testing 2933 kit which has 2933 SPD profile at 1.2V. However if you want it to run at 2666 then better get 2666 kit as I don't how how it's acting when SPD is higher.
https://www.hyperxgaming.com/us/memory/fury-ddr4
one example
https://www.kingston.com/dataSheets/HX426C16FW2K2_16.pdf


The same Crucial Ballistix Tactical Tracer (the one with RGB LEDs) is based on Micron E chips which are designed for 2666 so have 2666 SPD and the same or higher clock in XMP.
http://www.crucial.com/usa/en/blt2k8g4d26bft4k

Actually Micron IC is probably the only one in mass sales at 2666 SPD.
All Crucial 2400+ (except Elite) memory kits are based on Micron D or E so will have 2400 or 2666 SPD. Ballistix Sport and Sport AT/LT will have both IC, my last LT and AT were 2400 with XMP at 2666-3000. Still better than 2133.
Crucial standard series, with green PCB and relaxed profile should be on SPD as on the label so 2666 should be with SPD=2666. Still I'm not 100% sure.