Looking for recommendation for 64gb DDR4-2666

dderidex

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Oct 31, 2001
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Feels like it's been a day since I've posted here, but looking for some advice! Per the subject - I'm trying to find some ram for my system. SEEMS like a simple question, although here is the catch - I'm running a Shuttle XPC, with an H-series Intel chipset, so I cannot use XMP profiles. The ram has to be DDR4-2666 in SPD *only*, not XMP.

First I tried Corsair CMK64GX4M4A2666C16 - this got me the 64gb I was looking for, but the DDR 2666 speed was only available in the XMP profiles. Since this chipset mobo can only use the SPD value, the ram ran at only 2133 speed.

Currently I'm running Crucial Ballistix BL2K16G26C16U4B - which checks off the 'DDR4 2666 in SPD' box, but only comes in 32gb (2x16gb) kits. Tried using a pair of those to get 64gb, but they weren't stable.

It's quite difficult to tell, from the companies that have ram listed at these speeds, when they are able to hit this speed only with XMP profile, or whether they have that speed set in SPD!

Any thoughts/recommendations?
 

dderidex

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did you check with shuttle for a qvl list?
these should (hopefully)work for you, spec sheet says default pnp speed is 2666
https://www.aztekcomputers.com/hx426c16fb3k264-kingston-1CV39M8YYK1.html
https://www.kingston.com/dataSheets/HX426C16FB3K2_64.pdf
I did check with Shuttle's website, but their compatibility list is...dated, to say the least. It has no 64gb kits listed, at all, despite the fact the motherboard/chipset has no problem supporting 64gb.

I'll take a look at that recommendation, thanks!
 

dderidex

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As an update: that Kingston tip did the trick. Ultimately went with a slight variant kit, owing to finding it for hella cheap on eBay, with: https://www.kingston.com/dataSheets/HX426C16FB3K4_64.pdf

Works great! Had to clear CMOS to get it to boot, which felt a bit unusual, but that done everything is A-OK. Memtest ran without issue, sitting in Windows now with 64gb of DDR4-2666!
 

pendragon1

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Oct 7, 2000
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As an update: that Kingston tip did the trick. Ultimately went with a slight variant kit, owing to finding it for hella cheap on eBay, with: https://www.kingston.com/dataSheets/HX426C16FB3K4_64.pdf

Works great! Had to clear CMOS to get it to boot, which felt a bit unusual, but that done everything is A-OK. Memtest ran without issue, sitting in Windows now with 64gb of DDR4-2666!
nice, glad to hear. the clearing cmos thing was probably to get it to retrain correctly to the new ram.
 
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