Not sure. Does this help, from my year-old order confim?
Precision 3431 SFF BTX BASE
Intel vPro Technology Enabled
631-ACEU 1
M.2 512GB PCIe NVMe Class 40 Solid State Drive
400-BFGH 1
16GB 2X8GB DDR4 2666MHz UDIMM Non-ECC Memory
370-AEFV 1
Intel Integrated Graphics
490-BBBS 1
Integrated Intel SATA Controller
403-BBCE 1
C3 M.2 SSD
449-BBMC 1
Dell Precision Tower Heatsink
412-AAOM 1
Intel Core i7-9700, 8 Core, 12MB Cache, 3.0GHz, 4.7 GHz Turbo w/UHD Graphics 630
338-BRYU 1
Precision 3431 Tower with 200W up to 92% efficient PSU (80Plus Platinum)