To be clear from a Dell warranty and policy perspective, OEM BIOS and OEM tested/validated memory sticks work without issues user should not expect non-tested/non-validated retail memory sticks to work at all or be supported.
The XPS 8940 is shipped with 3200MHz memory. However, with Intel Core i3/i5 processors, it is limited to 2666MHz. With Intel Core i7/i9 processors, it is limited to 2933MHz.
If you want to know the exact brand of RAM that's installed now, even though you can get compatible RAM from other sources as @Mary G said, you could install CPU-Z (free) and look on its SPD tab.
The memory in it was “Forza”brand. It failed the Dell “Support Assist” a couple times (but not every time). And despite having passed the basic and standard levels of the onboard memory diagnostic, hung that diagnostic on a run of the expanded level. Then the PC started sporadically resetting - not a BSOD - just a power cycle.
Tried reseating the DIMMs, no joy.
Just finished swapping the 4 8GB sticks with 2 8GB sticks I salvaged from a late-model XPS and it seems better.
I just got my 8940 the other day with 16GB single stick of RAM. It's sk hynix hmaa2gu6cjr8n 1Rx8.
After reading and searching about the memory before purchase, I bought a 2Rx8 16GB Crucial stick. It performs better than the Hynix. And they work together in dual channel per BIOS. Seems the supplies have changed.
speedstep
9 Legend
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47K Posts
1
June 27th, 2021 14:00
Four UDIMM slots
Maximum 128GB
2666 MHz, i3/i5 CPU
2933 MHz, i7/i9 CPU
128GB = 4x32GB
64GB = 2x32GB, 4x16GB
32GB = 1x32GB, 2x16GB
16GB = 1x16GB, 2x8GB
8GB = 1x8GB, 2x4GB
To be clear from a Dell warranty and policy perspective,
OEM BIOS and OEM tested/validated memory sticks work without issues
user should not expect non-tested/non-validated retail memory sticks to work at all or be supported.
The XPS 8940 is shipped with 3200MHz memory. However, with Intel Core i3/i5 processors, it is limited to 2666MHz.
With Intel Core i7/i9 processors, it is limited to 2933MHz.
732YD 32GB DDR4, 3200MHz, 2Rx8, Unbuffered, 288 pin, Dual Rank, 1.2V, Non-ECC, Non-Encrypted, Hynix HMAA4GU6AJR8N-XN/HMAA4GU6CJR8N-XN, Micron MTA16ATF4G64AZ-3G2B1/MTA16ATF4G64AZ-3G2E1, Samsung M378A4G43AB2-CWE
C5N22 16GB DDR4, 3200MHz, 2Gx64, 2RX8, Unbuffered, 288 pin, Dual Rank, 1.2V, Non-ECC, Non-Encrypted, Adata AO2P32NCST2-BZ7SHD, Hynix HMA82GU6DJR8N-XN, Kingston KC5N22-HYD/KC5N22-MIE, Micron MTA16ATF2G64AZ-3G2J1, Samsung M378A2K43EB1-CWE
V0M5R 8GB DDR4, 3200MHz, 1Gx64, 1RX8, Unbuffered, 288 pin, Single Rank, 1.2V, Non-ECC, Non-Encrypted, Adata AO2P32NC8T1-BZ5SHD, Hynix HMA81GU6CJR8N-XN/HMA81GU6DJR8N-XN, Kingston KV0M5R-HYD/KV0M5R-MIE, Micron MTA8ATF1G64AZ-3G2J1, Samsung M378A1K43EB2-CWE
36FTX 4GB DDR4, 3200MHz, 512x64, 1RX16, Unbuffered, 288 pin, Single Rank, 1.2V, Non-ECC, Non-Encrypted, Adata AO2P32NC4U1-BZNSHD, Hynix HMA851U6DJR6N-XN, Kingston K36FTX-MIE, Micron MTA4ATF51264AZ-3G2J1, Samsung M378A5244CB0-CWE
Mary G
4 Operator
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20.1K Posts
1
June 27th, 2021 07:00
XPS 8940 Setup and Specifications (dell.com)
Get extra ram from Dell or Crucial to make sure to get the right ram.
RoHe
10 Elder
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45.2K Posts
1
June 27th, 2021 11:00
If you want to know the exact brand of RAM that's installed now, even though you can get compatible RAM from other sources as @Mary G said, you could install CPU-Z (free) and look on its SPD tab.
lb11
1 Rookie
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35 Posts
0
June 27th, 2021 14:00
I know what I have, I’d like to know what others have.
I bought from a retailer, not from Dell direct, and have reason to believe they swapped memory.
I’d like to know what Dell supplies before I have a talk with the retailer.
lb11
1 Rookie
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35 Posts
0
June 27th, 2021 14:00
Exactly what I wanted, thank you.
The memory in it was “Forza”brand. It failed the Dell “Support Assist” a couple times (but not every time). And despite having passed the basic and standard levels of the onboard memory diagnostic, hung that diagnostic on a run of the expanded level. Then the PC started sporadically resetting - not a BSOD - just a power cycle.
Tried reseating the DIMMs, no joy.
Just finished swapping the 4 8GB sticks with 2 8GB sticks I salvaged from a late-model XPS and it seems better.
BizzyM
1 Rookie
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3 Posts
0
July 16th, 2021 11:00
They're both spec'd at 3200, but 2933 limit on my i7.
RoHe
10 Elder
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45.2K Posts
0
July 16th, 2021 11:00
@BizzyM What speed is the pair running at?
BizzyM
1 Rookie
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3 Posts
0
July 16th, 2021 11:00
I just got my 8940 the other day with 16GB single stick of RAM. It's sk hynix hmaa2gu6cjr8n 1Rx8.
After reading and searching about the memory before purchase, I bought a 2Rx8 16GB Crucial stick. It performs better than the Hynix. And they work together in dual channel per BIOS. Seems the supplies have changed.
Item number on my invoice for memory is 370-AGFW.
RoHe
10 Elder
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45.2K Posts
0
July 16th, 2021 12:00
Thanks. Good to hear this "mixed" pair is running at the PC's max RAM speed of 2933 MHz