edofaravelli,

Adding the correct memory and memory configuration will not affect your computer or your warranty.

Below is the memory configuration table.

Memory

The XPS 8930 has four DIMM slots. Your computer supports 8 GB, 16 GB, 24 GB, 32 GB, and 64 GB UDIMM DDR4 memory (up to 2400 MHz for i3 processor and up to 2666 MHz for i5/i7/i7k processors).

The following table lists the available memory configuration matrix:

The note and memory you show is from the Service Manual and is wrong. Memory should be added in pairs (for dual channel mode) with similar colored memory module securing tabs (white or black). The white pair is DIMM1 & DIMM2 and the black pair is DIMM3 & DIMM4. In addition, while the table shows only 5 possible configurations, they are not the only configurations that will work. In fact, my XPS came with 16GB in a a single memory module. If memory is installed according to the note the memory will work in single channel mode.

The short answer is ...

Install each exactly-matching pair of DIMMs ... in the same-color-tabbed slots. The two white-tabbed slots comprise the Primary memory-bank.

Run ePSA after to check work.

@Tesla1856 thank you but it's going to techy for me, sorry.

So, If I add the new 16 and 16 in the two white-tabbed slot and the original 8 and 8 in the black ones it will work? My main concern is that it won't affect my system or ruin anything, because if so I'd buy other 2x16 to reach 64 or send the one I bought back.

But If i can use them it would be great.

Dunno what is ePSA (I'm so bad I know...) :Crying:

If the memory you brought is compatible with the system it will work. You did not say exactly what memory you purchased, It will not ruin your system if you install the modules correctly. Whether or not you will get 2666 MHz will depend on the memory purchased. Some memory is tested to work at 2666 MHz but is actually rated lower. I don't want to get too techy here and go into XMP, SPD speed, etc.

Thanks for the patience @Vic384, I bought these:

https://www.amazon.it/gp/product/B0736W5BH2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

So if I install this in white DIMM and the original 8+8 in black DIMM it should work, or at least be harmless?

Do you suggest me to buy other two like these to have all the same (and reach 64gb that btw it won't be bad)

This memory should work and would not harm your machine. I could not find the detailed Crucial specs to know if it will work at 2666 MHz but it should at least work at 2133 MHz. If your install this memory you should have 48 GB, I don't know why you would need 64 GB, 48 GB should be more than enough memory. That is a lot of money to spend on memory unless you really need it.

Thanks @Vic384, you've been greatly helpful.

Yeah, I think 48 will be fine too but I work in After Effects and it's a RAM eating monster! ;)

I have an XPS 8930 and I did the exact same thing, except I did 8 16 8 16. 

It has been working fine for me. My ram shows 2666Mhz and I've had no problems using this setup for several days now. Pretty happy with this setup.

Now I'm waiting for a 1TB M2 NVME drive to come from Amazon to replace the tiny 240? GB drive.

Hi,

I have a similar situation.. my XPS 8930 came with 16GB RAM - 2 x 8GB sticks

DIMM # 1
SMBus address 0x51
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) SK Hynix (AD00000000000000000000)
SDRAM Manufacturer (ID) SK Hynix (AD00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2666 (1333 MHz)
Part number HMA81GU6JJR8N-VK
Manufacturing date Week 32/Year 19

DIMM # 2
SMBus address 0x53
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) SK Hynix (AD00000000000000000000)
SDRAM Manufacturer (ID) SK Hynix (AD00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2666 (1333 MHz)
Part number HMA81GU6JJR8N-VK
Manufacturing date Week 32/Year 19

I'm looking to add 2 x 16GB memory and was hoping to be running at 48GB.

Would the following work in the 8+16+8+16 configuration?

https://www.crucial.com/memory/ddr4/ct2k16g4dfd8266/ct11062074

Alternatively, if it doesn't then do I need to stay at 2666 ?  I see deals showing up on slickdeals for DDR4 3200 and higher speeds

thanks

The Crucial memory should work. You cannot use higher speed memory, the XPS 8930 will operate at the maximum of 2666 MHz if you have an i5 or i7 processor.

thank you.

Have exactly done what you are thinking of -- runs perfectly and all RAM recognized/useable.