My Mac Pro freezes.

Question

I have two startup disks. One SL for fcp 7 and one ML where I run FCP X. FCP X is often plagued by the beach ball. Recently when editing on FCP X (and I suspect it's when I am also running Safari) my Mac Pro freezes and requires a power off to get going again. Any suggestions?
Here is Etrecheck readout:
Hardware Information:
          Mac Pro (Early 2009)
          Mac Pro - model: MacPro4,1
          2 2.26 GHz Quad-Core Intel Xeon CPUs: 8 cores
          12 GB RAM
Video Information:
          ATI Radeon HD 4870 - VRAM: 512 MB
Startup Items:
          PACESupport - Path: /Library/StartupItems/PACESupport
System Software:
          OS X 10.8.4 (12E55) - Uptime: 0 days 1:11:18
Disk Information:
          HL-DT-ST DVD-RW GH41N 
          HL-DT-ST DVD-RW GH41N 
          WDC WD1001FALS-41K1B0 disk0 : (1 TB)
                    disk0s1 (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) /Volumes/Macintosh HD: 999.73 GB (642.78 GB free)
          ST31500341AS disk2 : (1.5 TB)
                    disk2s1 (disk2s1) <not mounted>: 209.7 MB
                    Internal 2 (disk2s2) /Volumes/Internal 2: 1.5 TB (198.77 GB free)
          ST31500341AS disk1 : (1.5 TB)
                    disk1s1 (disk1s1) <not mounted>: 209.7 MB
                    internal 1A startup (disk1s2) /: 499.79 GB (293.1 GB free)
                    Recovery HD (disk1s3) <not mounted>: 650 MB
                    internal 1 B (disk1s4) /Volumes/internal 1 B: 999.52 GB (457.35 GB free)
          ST31500341AS disk3 : (1.5 TB)
                    disk3s1 (disk3s1) <not mounted>: 209.7 MB
                    Internal 3 (disk3s2) /Volumes/Internal 3: 1.5 TB (857.9 GB free)
USB Information:
          Apple Computer, Inc. Apple Cinema Display
          Apple Inc. BRCM2046 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Logitech USB-PS/2 Trackball
            USB Keyboard
FireWire Information:
          LaCie Rugged FW/USB 800mbit - 800mbit max
                    disk4s1 (disk4s1) <not mounted>: 32 KB
                    LaCie 1TB-2 (disk4s3) /Volumes/LaCie 1TB-2: 1 TB (508.36 GB free)
Thunderbolt Information:
Kernel Extensions:
          com.matrox.vpg.EggWhiteDriverHelpers          (1.0.0d1)
          com.matrox.vpg.BlackSwanDriver          (1.0.0d1)
          com.matrox.vpg.CoreMediaInputDriver          (1)
          com.matrox.vpg.CoreMediaOutputDriver          (1)
          com.matrox.vpg.CoreAudioDriver          (1)
          com.matrox.vpg.RS422Driver          (1.0.0d1)
          com.matrox.vpg.RS422VirtualDriver          (1)
          com.paceap.kext.pacesupport.snowleopard          (5.8)
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist
          [loaded] com.noiseindustries.FxFactory.helper.plist
          [loaded] com.paceap.eden.licensed.plist
          [loaded] PACESupport.plist
Launch Agents:
          [loaded] com.matrox.vpg.Agent.plist
User Launch Agents:
          [failed] com.apple.CSConfigDotMacCert-[redacted]@me.com-SharedServices.Agent.plist
          [loaded] com.digitalrebellion.PreferenceManagerAutoSave.plist
User Login Items:
          iTunesHelper
          Dropbox
3rd Party Preference Panes:
          Flash Player
          Matrox Utilities
Internet Plug-ins:
          Flash Player.plugin
          FlashPlayer-10.6.plugin
          JavaAppletPlugin.plugin
          QuickTime Plugin.plugin
User Internet Plug-ins:
Bad Fonts:
          None
Top Processes by CPU:
               3%          WebProcess
               1%          fontd
               1%          EtreCheck
               1%          PluginProcess
               0%          WindowServer
               0%          Safari
               0%          Dropbox
               0%          blued
Top Processes by Memory:
          602 MB             WebProcess
          160 MB             PluginProcess
          106 MB             mds
          74 MB              Safari
          74 MB              Dropbox
          49 MB              Dock
          37 MB              SystemUIServer
          37 MB              WindowServer
          25 MB              coreservicesd
          25 MB              Finder
Virtual Memory Statistics
          9.31 GB            Free RAM
          1.59 GB            Active RAM
          87 MB              Inactive RAM
          1023 MB            Wired RAM
          255 MB             Page-ins
          0 B                Page-outs

Answer 1

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter "BOOT_TIME" (without the quotes) in the search box. Note the timestamps of those log messages, which refer to the times when the system was booted. Now clear the search box and scroll back in the log to the last boot time after  you had the problem. Select the messages logged before the boot, while the system was unresponsive or was failing to shut down. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). Please include the BOOT_TIME message at the end of the log extract.
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the entire contents of the most recent one, if any. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.