diff --git a/README.rst b/README.rst
index edd131f83..fa5f93cda 100644
--- a/README.rst
+++ b/README.rst
@@ -37,12 +37,16 @@ Prep
 Validations that are run on a fresh machine *before* the undercloud is
 installed.
 
+- `undercloud-ram.yaml`: Verify the undercloud fits the RAM requirements
+
 Pre Introspection
 ~~~~~~~~~~~~~~~~~
 
 Validations that are run when the undercloud is ready to perform hardware
 introspection.
 
+- `undercloud-ram.yaml`: Verify the undercloud fits the RAM requirements
+
 Pre Deployment
 ~~~~~~~~~~~~~~
 
diff --git a/validations/undercloud-ram.yaml b/validations/undercloud-ram.yaml
new file mode 100644
index 000000000..111ab7d07
--- /dev/null
+++ b/validations/undercloud-ram.yaml
@@ -0,0 +1,18 @@
+---
+- hosts: undercloud
+  vars:
+    metadata:
+      name: Verify the undercloud fits the RAM requirements
+      description: >
+        Verify that the undercloud has enough RAM.
+
+        https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/7/html/Director_Installation_and_Usage/sect-Undercloud_Requirements.html
+      groups:
+        - prep
+        - pre-introspection
+    min_undercloud_ram_gb: 16
+  tasks:
+  - name: Verify the RAM requirements
+    fail: msg="The RAM on the undercloud node is {{ ansible_memtotal_mb }} MB, the minimal recommended value is {{ min_undercloud_ram_gb|int * 1024 }} MB."
+    # NOTE(shadower): converting GB to MB
+    failed_when: "({{ ansible_memtotal_mb }}) < {{ min_undercloud_ram_gb|int * 1024 }}"