Added CPU requirements (#1734)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Installation/Overview.md

@@ -12,7 +12,4 @@ You can install Pantheon by:
 !!! note 
     To run a single node to connect the Ethereum mainnet or a public testnet, running from the [Pantheon docker image](../Getting-Started/Run-Docker-Image.md) is the fastest way to get started.
 
-## Disk Space and RAM Requirements
-Your computer should have at least 4 GB RAM if running a private network, and 8GB of RAM if running mainnet or a public test network. 
 
-Disk space needed varies depending on the network on which you run nodes. A small test network might require 200 MB while a mainnet node might require 1.5TB. If syncing a node on mainnet, allow 1.5 TB to 2 TB for the full blockchain archive.

docs/Installation/System-Requirements.md

@@ -0,0 +1,29 @@
+title: System Requirements
+description: System requirements to sync and run Pantheon 
+<!--- END of page meta data -->
+
+# System Requirements 
+
+The system requirements for Pantheon depend on a number of factors: 
+
+* Size of the world state for the network
+* Number of transactions submitted to network 
+* Block gas limit 
+* Number and complexity of [JSON-RPC](../Pantheon-API/Using-JSON-RPC-API.md), [PubSub](../Pantheon-API/RPC-PubSub.md), 
+or [GraphQL](../Pantheon-API/GraphQL.md) queries being handled by the node 
+
+## Determining System Requirements  
+
+To determine system requirements, monitor CPU and disk space requirements using [Prometheus](https://docs.pantheon.pegasys.tech/en/stable/Monitoring/Monitoring-Performance/#monitor-node-performance-using-prometheus). 
+A sample [Grafana dashboard](https://grafana.com/grafana/dashboards/10273) is provided for Pantheon. 
+
+!!! tip
+    CPU requirements are highest when syncing to the network and typically reduce once the node is synchronized to the chain head. 
+
+## RAM 
+
+Pantheon requires 4GB of RAM. For Ethereum Mainnet, a minimum of 8GB of RAM is required 
+
+## Disk Space 
+
+Syncing to the Ethereum mainnet requires 3TB for a full sync. 

mkdocs.yml

@@ -57,6 +57,7 @@ nav:
         - Installation Overview: Installation/Overview.md
         - Install Binary Distribution: Installation/Install-Binaries.md
         - Build from Source: Installation/Build-From-Source.md
+        - System Requirements: Installation/System-Requirements.md
     - Architecture:
         - Overview: Architecture/Overview.md
     - Getting Started: