I have a couple of dual core Atom boxes running as servers (file server and zoneminder security server), they've been working quite well for several years now but are due for a refresh. Because of an innefficient chipset they use 35 watts, not bad but these days we can do a lot better. A new quad core Raspberry PI 2 is very tempting - at just 3W I'll save around $40 worth of electricity a year and will pay for themselves within 18 months. Anyway, I thought i'd do some testing and share the results for anyone else considering similar ventures. Testing as a file server replacement, I installed Raspbian and shared a 3TB USB drive via SAMBA. It happily saturated the 100mbit network interface with a solid 10.5MB/sec transfer. This is OK for media playback, but a bit slow when I want to do bulk transfers. Testing as a zoneminder security server was the real kicker. This has a heavy CPU load due to decompressing jpeg images and performing motion detection. I ran a full test with 3 IP cameras @ 640x480 resolution, 5 frames a second capture, motion detection and streaming the live video to my desktop. The Atom box does this at 40% CPU and the RPI2 was 52% - not bad for a tiny credit card PC!! The only issue was a slow web interface when using the event browser, this may have been due to a really slow SD card I was testing with. Due to the slow network interface I decided to pass on using the RPI2's as servers, but have decided instead to give the ODROID-C1's a go. They are the same price and size as the RPI2's but have a genuine gigabit interface, faster SD card support, faster RAM and faster CPU's (4 cores @ 1.5GHz). Given the tests above these should perform as good if not better than the Atom boxes at both file sharing and Zoneminder!