Unsolved
1 Rookie
•
1 Message
0
1865
May 7th, 2024 22:07
Dell T40 Memory Upgrade
Running for years with 8 GB although recently seeing some critical memory shortages. Looking to upgrade the factory shipped 8 GB for Dell T40.
Current Memory
Type: DDR4
Type Detail: Synchronous
Speed: 2666 MT/s
Manufacturer: 80CE000080CE
Serial Number: 121FB21B
Asset Tag: 03192300
Part Number: M391A1K43BB2-CTD
Rank: 1
Configured Memory Speed: 2666 MT/s
Looking to purchase 64 GB Does this memory fit the T40?
SAMSUNG M393A2G40DB0-CPB 16GB (1X16GB) 2RX4 PC4-2133P DDR4 Server Memory
Reading the T40 specs:
Memory specifications
CAUTION Dell recommends you to use ECC DIMMs to minimize the risk of uncorrectable system error, data loss and/or silent data corruption. Non-ECC DIMM is not used for mission-critical applications.
NOTE Mixing ECC DIMMs and non-ECC DIMMs is not supported.
NOTE Non-ECC DIMMs are supported only in selected countries, for more information contact your sales representative.
| DIMM Type | DIMM capacity | Minimum RAM | Maximum RAM |
|---|---|---|---|
| UDIMM, DDR4, ECC/Non-ECC | 8 GB | 8 GB | 32 GB |
| 16 GB | 16 GB | 64 GB |
| Memory module sockets | Speed |
|---|---|
| Four 288-pin | 2666 MT/s |
NOTE Memory speed maybe downgraded from 2666 MT/s to 2133 MT/s based on processor capability.
No Events found!
DELL-Joey C
Moderator
•
4.2K Posts
•
21K Points
0
May 8th, 2024 03:40
Hi,
The server only supports UDIMM memory. The Samsung memory you shared is a RDIMM. Here are the list of Dell certified memory DPN#.
DK8NX DIMM,16GB,3200,1RX8,16,DDR4,NU Memory, 16GB
R1WG8 DIMM,16GB,3200,1RX8,16,DDR4,EU Memory, 16GB
TP9W1 DIMM,16GB,2666,2RX8,8G,DDR4,NU Memory, 16GB
VDFYD DIMM,16GB,2666,2RX8,8G,DDR4,U Memory, 16GB
user_48eceb
1 Rookie
•
2 Posts
•
2 Points
0
October 27th, 2025 08:43
Is Crucial pro 32GB ram 3200 supported in 1 DIMM slot
user_48eceb
1 Rookie
•
2 Posts
•
2 Points
0
October 27th, 2025 08:44
Can we use 32GB 2 RAMs or only 16GB supported in 1 slot?
Dell-Martin S
Moderator
•
3.8K Posts
•
25.5K Points
0
October 27th, 2025 12:37
Hi,
The Crucial Pro 32GB DDR4-3200 RAM is not officially supported in a single 32GB DIMM configuration by the Dell PowerEdge T40. According to Dell’s technical documentation, the T40 supports up to 64GB using four DDR4 UDIMMs and officially only lists 8GB and 16GB ECC UDIMMs as supported capacities per slot. The specified maximum RAM per DIMM is 16GB, and the supported speed is DDR4-2666.
Using a single 32GB module, even non-ECC, is not confirmed as compatible by Dell. Some third-party vendors list 32GB modules, but these are typically ECC, DDR4-2666, and not guaranteed by Dell. While a Crucial DDR4-3200 module may physically fit and sometimes function (likely downclocking to 2666 MT/s), stability or compatibility in the T40 is not assured, especially with 32GB DIMMs.
For best compatibility and system stability, use 8GB or 16GB DDR4-2666 ECC UDIMMs in any of the T40’s four slots. If attempting to use a 32GB DDR4-3200 Crucial Pro module, proceed with caution, as Dell does not officially support it.
Sources:
[1] Dell EMC PowerEdge T40 Technical Guide https://i.dell.com/sites/csdocuments/product_docs/en/poweredge_t40_tech_guide.pdf
[2] Dell PowerEdge T40 Memory Upgrades ... https://memory.net/product-category/dell/poweredge/t40/
[3] Dell EMC PowerEdge T40 Technical Specifications Guide https://www.dell.com/support/manuals/en-us/poweredge-t40/pet40_ts_pub/memory-specifications?guid=guid-dbb6ac56-09da-49f4-ab1a-9da9d88d09a5&lang=en-us
[4] Dell PowerEdge T40 | SSD & RAM Upgrades https://www.crucial.com/compatible-upgrade-for/dell/poweredge-t40
[5] Crucial Pro 32GB Kit (16GBx2) DDR4-3200 UDIMM https://www.crucial.com/memory/ddr4/cp2k16g4dfra32a
[6] Non Dell RAM for Dell EMC PowerEdge T40 : r/HomeServer https://www.reddit.com/r/HomeServer/comments/fwj07o/non_dell_ram_for_dell_emc_poweredge_t40/
[7] What's up with Crucial Pro DDR4-3200 RAM poor timings? https://www.reddit.com/r/buildapc/comments/193kxve/whats_up_with_crucial_pro_ddr43200_ram_poor/