diff --git a/src/mainboard/google/rex/variants/karis/memory/Makefile.inc b/src/mainboard/google/rex/variants/karis/memory/Makefile.inc
index eace2e443e..a37b32ff01 100644
--- a/src/mainboard/google/rex/variants/karis/memory/Makefile.inc
+++ b/src/mainboard/google/rex/variants/karis/memory/Makefile.inc
@@ -1,5 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 # This is an auto-generated file. Do not edit!!
-# Add memory parts in mem_parts_used.txt and run spd_tools to regenerate.
+# Generated by:
+# util/spd_tools/bin/part_id_gen MTL lp5 src/mainboard/google/rex/variants/karis/memory/ src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt
 
-SPD_SOURCES = placeholder
+SPD_SOURCES =
+SPD_SOURCES += spd/lp5/set-0/spd-11.hex      # ID = 0(0b0000)  Parts = MT62F1G32D2DS-023 WT:B, H58G56BK8BX068
+SPD_SOURCES += spd/lp5/set-0/spd-1.hex      # ID = 1(0b0001)  Parts = H9JCNNNBK3MLYR-N6E
+SPD_SOURCES += spd/lp5/set-0/spd-7.hex      # ID = 2(0b0010)  Parts = K3KL8L80CM-MGCT
diff --git a/src/mainboard/google/rex/variants/karis/memory/dram_id.generated.txt b/src/mainboard/google/rex/variants/karis/memory/dram_id.generated.txt
index fa247902ee..a34678eeb7 100644
--- a/src/mainboard/google/rex/variants/karis/memory/dram_id.generated.txt
+++ b/src/mainboard/google/rex/variants/karis/memory/dram_id.generated.txt
@@ -1 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This is an auto-generated file. Do not edit!!
+# Generated by:
+# util/spd_tools/bin/part_id_gen MTL lp5 src/mainboard/google/rex/variants/karis/memory/ src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt
+
 DRAM Part Name                 ID to assign
+MT62F1G32D2DS-023 WT:B         0 (0000)
+H9JCNNNBK3MLYR-N6E             1 (0001)
+H58G56BK8BX068                 0 (0000)
+K3KL8L80CM-MGCT                2 (0010)
diff --git a/src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt b/src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt
index 96211370d9..e92b0a3d46 100644
--- a/src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt
+++ b/src/mainboard/google/rex/variants/karis/memory/mem_parts_used.txt
@@ -9,3 +9,7 @@
 # See util/spd_tools/README.md for more details and instructions.
 
 # Part Name
+MT62F1G32D2DS-023 WT:B
+H9JCNNNBK3MLYR-N6E
+H58G56BK8BX068
+K3KL8L80CM-MGCT