You can also disable the auto wp-cron from loading and setup a manual cron job on your server.
Add the following line to your Wp-config.php
define('DISABLE_WP_CRON', true);
and then on your server/control panel create a cron job to run the following:
wget http://www.yourdomain.com/wp-cron.php > /dev/null 2>&1
I run mine every 5 minutes.