Aurora-R7, RAM used 16GB HyperX DDR4 XMP 2933MHz

Looks like your best bet is to just buy it with two modules (if that is an option) as I too don't find it aftermarket.  I find a lot of Kingston HyperX but not that specific 2933Mhz. 

I went directly to Kingston since they manufacture the Ram for Dell under an OEM agreement. To make sure you get the right stuff send a picture of what is currently installed in your system. They will cross reference it and give you exactly what you need. I found out the 2933mhz is actually 2133mhz ram overclocked by the bios provided with the alienware. Either that you can run separate ram on the second channel and get something other than the OEM. It's shameful under the build when you buy the PC, Dell states it's upgradeable and at this time you cannot buy Ram from them for these machines @ 2933mhz. They do not even have an estimated time frame of when they will start carrying it. The warranty may be compromised as well if you add Ram in that was not purchased directly from Dell. Really disappointed with Dell over this simple upgrade. 

If their 2933 is oc'd 2133 what do you think their 2666 is?

Dell, in many opinions including my own, has done us a disservice by selling single 2933 DIMM's in these machines, since they cannot seem to stock add-ons, and their sales people are telling us single is as good as dual; it is in fact roughly 25% slower overall.  Expecting a pair of 2933 8GB's (as indicated in the service manual), I was surprised to find a single 16.  Kingston may be saying their 2133 's will o/c, but unless somebody has tried it, I wouldn't count on it, and they told me they cannot sell the OEM Dell part.  I found somebody had successfully used G.Skilz Ripjaws V 3000, so I bought a pair of them, had no problem with XMP1 2933, and got big improvement in the benchmark.

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@hrgreen wrote:

Dell, in many opinions including my own, has done us a disservice by selling single 2933 DIMM's in these machines, since they cannot seem to stock add-ons, and their sales people are telling us single is as good as dual; it is in fact roughly 25% slower overall. 

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Agreed.

Many of us found the same on Aurora-R6. Luckily, I managed to get mine swapped out (a single DIMM for a matching pair). I also tried to help others, but not sure how all that turned out (with Dell in the middle) but I tried.

https://www.dell.com/community/Alienware-General/Aurora-R6-Memory-Question-Why-a-single-DIMM/m-p/5591756

However, I thought they had fixed it on the Aurora-R7 sales-config pages. I remember looking once, and they specified how many DIMMs on the optional line-item ram selections (the higher-end ones anyway).

Interestingly, the DDR4 HyperX Fury 2933 RAM is suddenly available on the HyperX website.  Last week they couldn't tell me anything about it.  As far as I can tell, this is the specific RAM for the Aurora R7.

https://www.hyperxgaming.com/us/memory/fury-ddr4?partnum=HX429C17FR2K4/32

Yeah, all the way up to 3466, but they forgot to change the banner.

I was wondering well they work ok with Auroa R6 also since I have just one 16GB HyperX at 2666MHz by buying one or get two for replacement instead.

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@terry51wrote:

I was wondering well they work ok with Auroa R6 also since I have just one 16GB HyperX at 2666MHz by buying one or get two for replacement instead.

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Just a reminder ... the pair of DIMMs in the same bank (so they run dual-channel) ... must match exactly. So much so, that they are normally only sold in (and installed in) exactly matching pairs .

Truthfully, with all the problems I'm currently encountering trying to get 4 - 8 Gb HyperX 2933 modules to work I'd probably hold off a bit.  2 - 8 Gb HyperX modules work perfectly  (and I'll "assume" that 2 - 16 Gb work), but as of right now my system will not POST with the HyperX 2933 4/32 kit (4x8 Gb).

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@cacarottwrote:
Having ordered with one 16GB 2933 today I got one HX429C17FB/16 and it does not work on Dual-Channel with the preinstalled 16GB from Dell so it´s not the same RAM. The latency is different! The strange thing is when I installed the first time the new RAM in Slot 3 additionally the PC booted fine, only giving a short message that RAM-config has changed. I then got an error in OC Controls telling me the RAM was not configured right. After shutdown from cold start it didn´t want to boot neither in windows nor in bios. So I plugged out the new HX429C17FB/16 and started with the original RAM, again tried with both memories and could not get the machine started. Even tried slot 2+4 but didn´t help. Then I thought let´s see if it works on slot 1+2 and it booted up fine, knowing I again only will have Single-Channel. It´s a pain in the **bleep**!

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So, XMM1 and XMM2 (the white-clipped slots) compose the Primary Memory Bank. The other DIMM slots are the Secondary. If you have a matched-pair, they should go into Primary Memory Bank. If un-matched, they should run in XMM1 and XMM3 as single channel. You can run CPUID's CPUz to see all specifics on installed DIMMs.

On the Aurora-R6, I don't think anyone ever got a retail DIMM to run dual-channel with a Dell OEM DIMM. However, it's not that surprising since they didn't match exactly. Not sure why Dell doesn't sell the OEM DIMMs ... if nothing else, as "repair parts".