Synology Disk Station DS409+ - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) Promise Technology SmartStor NS4600 - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) - Western Digital Black 500GB (Serial ATAII) Synology Disk Station DS109 - Western Digital Black 500GB (Serial ATAII) The TS-809 Pro Turbo used 35% more power than the Synology DS409+ and double the amount consumed by the Promise SmartStor NS4600. These results are not as surprising when you consider the powerful hardware inside QNAP’s device. It will be interesting to see if similar margins ensue when it comes to performance.