CORSAIR Vengeance LPX 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 2666 CL16 $235.40 Delivered @ Newegg
Last edited 17/06/2019 - 15:06 by 1 other user
Cheapest "sold for Threadripper X399" 32GB quad channel RAM kit I could find.
CORSAIR Vengeance LPX 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 2666 (PC4 21300) memory kit for DDR4 Systems Model CMK32GX4M4A2666C16R
DDR4 2666 (PC4 21300)
CAS Latency 16
Note that the three colour choices make up more than 10 units.