Looking to build an i9-9900X system. According to Intel, RAM should be DDR4-2666 (https://www.intel.com/content/www/us/en/products/processors/core/x-series/i9-9900x.html).

I never overclock.

The problem with the RAM vendors is, they do not advertise the real (SPD) frequency, which is much lower than the one advertised. For example, I could find RAM advertised to run at 3200, but according to the manufacturer specification, SPD frequency is as low as 2133. Instead, higher frequencies are stored in XMP profiles, but that's a cheat because it basically means overclocking (also, the voltage is higher than 1.2V)

So is there any RAM brand that really runs at 2666, by SPD?

The closest I could find is some Kingston memory that runs at 2400, so I'm thinking to go with it if I can't find a real one. It has a 2666 setting in one of the XMP profiles, and my reasoning is to overclock as little as possible.

Thanks in advance.

  • Just to confirm: you are not confusing data rate with clock frequency, are you? Since the double in DDR means that data rate is double clock frequency. Can you give an example of such datasheet? May 14 '19 at 16:40
  • Ok, turned out I'm uniformed. Will have to read JEDEC docs once I'm able to do so. May 14 '19 at 16:42
  • @Jan Dorniak: Both this: kingston.com/dataSheets/HX430C15PB3K4_64.pdf and this: corsair.com/eu/en/Categories/Products/Memory/… are advertised as DDR4-3000, but according to the specs the SPD speed is lower.
    – memo
    May 14 '19 at 17:15
  • I was under the impression the only way you get those higher clocks means you have to overclock it. This question seems a bit off-topic though.
    – user1691
    May 14 '19 at 21:40

This might a little late, but I was searching for the same thing and came across these which were SPD-26666 out of the box:
VENGEANCE® RGB PRO 32GB (2 x 16GB) DDR4 DRAM 3200MHz C16 AMD Ryzen Memory Kit — Black


They can be bought on Amazon!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.