Do you use standby or hibernate?To follow up with Mickz's post, here's a quick synopsis of my environment:
Gigabyte GA-H55M-USB3 motherboard, i3 530 processor, 4gb RAM
128gb Crucial SSD (boot), 500gb Hitachi 2.5 (media)
Windows 7 ultimate, Centrafuse 3.1, Bluesoleil 8, Garmin GMPC
XMPCR satellite radion, Visteon HDZ300 HD radio
Generic ELM327 OBDII, BU-353 USB GPS
Uniden BCT8 UHF/VHF scanner with custom control plugin
RelayPros PWM81 8-channel relay controller with custom control plugin
Creative HD webcam with custom control plugin
Clear 3G/4G Wimax with Cradlepoint MDR1200 failover router
DroidX with custom remote control app for Centrafuse
Custom video streaming app for sending live video out to my media server.
Over a dozen custom plugins for streaming internet media, Google services, traffic, weather, social media, RSS etc...
If it's not pretty obvious, this is a fairly robust machine for a carPC. I can pretty much run anything and everything simultaneously without any real problem (as Mickz said, I'd be surprised if it didn't!).
But if you need an example, I can encode and stream live, 30fps video from my Sony Handycam, while recording it locally and viewing it (along with my webcam) in a PIP display. I capture live GPS position data along with OBDII data and overlay it on the recording, while listening to XM radio and have Garmin provides navigation and routing. I see around 35-60% processor usage in this scenario.
As a side note, the M2-ATX has no problem powering this setup. If you're looking for (an admittedly) high-performance system that is VERY frugal with it's power requirements, you'd be pretty hard pressed to find a better value than this motherboard. As I said, I have 2 (one ITX, one ATX). Highly recommended.
you use the M2-ATX correct?