2012 iMac 27 inch keeps crashing randomly, need help

Hello all,

Since a few months my 2012 iMac 27 inch keeps crashing. And the frequency seems to be increasing. At the moment 5-6 times a day. I don't know why. Can some expert please help me out here? Here's the most recent problem report (5 minutes ago), this time it says "kernel_task", other times it was Chrome or MailPlane or some other random app. Might this be a memory problem?

Anonymous UUID: 1543A957-0F03-765E-B3C3-47F30546AA14

Wed May 28 09:40:56 2014

panic(cpu 0 caller 0xffffff800d6dbf5e): Kernel trap at 0xffffff800d6a3469, type 13=general protection, registers:

CR0: 0x000000008001003b, CR2: 0x0000000158215000, CR3: 0x0000000010477000, CR4: 0x00000000000606e0

RAX: 0x0000000000000001, RBX: 0x0040000000000000, RCX: 0xffffff802a1469e0, RDX: 0x0000000000000821

RSP: 0xffffff81882437f0, RBP: 0xffffff8188243820, RSI: 0x0000000032a9f880, RDI: 0xffffff8013471f60

R8: 0x0000000000000000, R9: 0x0000000000000001, R10: 0xffffff800dcd15f0, R11: 0x0000000000000003

R12: 0xffffff8013471f60, R13: 0xffffff8011319000, R14: 0x0000000000565000, R15: 0xffffff803dc2e180

RFL: 0x0000000000010206, RIP: 0xffffff800d6a3469, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0x0000000158215000, Error code: 0x0000000000000000, Fault CPU: 0x0

Backtrace (CPU 0), Frame : Return Address

0xffffff8160436c50 : 0xffffff800d622fa9

0xffffff8160436cd0 : 0xffffff800d6dbf5e

0xffffff8160436ea0 : 0xffffff800d6f3456

0xffffff8160436ec0 : 0xffffff800d6a3469

0xffffff8188243820 : 0xffffff800d69bc5b

0xffffff8188243b90 : 0xffffff800d67345b

0xffffff8188243bf0 : 0xffffff800dabbe51

0xffffff8188243cf0 : 0xffffff800dabc0ce

0xffffff8188243d20 : 0xffffff7f8f4f3819

0xffffff8188243d50 : 0xffffff7f8f4f4679

0xffffff8188243d90 : 0xffffff7f8f4e5b5b

0xffffff8188243dd0 : 0xffffff7f8f4f346d

0xffffff8188243e10 : 0xffffff7f8e3ff222

0xffffff8188243e30 : 0xffffff7f8e3ff1b5

0xffffff8188243e60 : 0xffffff7f8f4e4361

0xffffff8188243e90 : 0xffffff7f8f4f3b8b

0xffffff8188243ed0 : 0xffffff7f8f4f1c59

0xffffff8188243ef0 : 0xffffff800dab0330

0xffffff8188243f30 : 0xffffff800daaedd2

0xffffff8188243f80 : 0xffffff800daaeea7

0xffffff8188243fb0 : 0xffffff800d6d7127

Kernel Extensions in backtrace:

com.apple.iokit.IOAcceleratorFamily(98.20)[A9B0998E-C32B-3A6C-A194-B6C735138446 ]@0xffffff7f8f4ca000->0xffffff7f8f522fff

dependency: com.apple.iokit.IOPCIFamily(2.9)[244D4E48-78E6-3369-8D76-285C66EF9BF4]@0xffffff 7f8dcbe000

dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[B889D3AB-CCC0-3FCD-A83E-D2E3E4CB537B]@0 xffffff7f8e52e000

com.apple.iokit.IOSurface(91.1)[ECD6EF7D-7A93-3380-8532-D90EEAB366DB]@0xffffff7 f8e3fa000->0xffffff7f8e40cfff

BSD process name corresponding to current thread: kernel_task

Mac OS version:

13D65

Kernel version:

Darwin Kernel Version 13.2.0: Thu Apr 17 23:03:13 PDT 2014; root:xnu-2422.100.13~1/RELEASE_X86_64

Kernel UUID: ADD73AE6-88B0-32FB-A8BB-4F7C8BE4092E

Kernel slide: 0x000000000d400000

Kernel text base: 0xffffff800d600000

System model name: iMac12,2 (Mac-942B59F58194171B)

System uptime in nanoseconds: 1620200658320

last loaded kext at 732914645203: com.evoluent.driver.VerticalMouseDriver 1.0.10f1 (addr 0xffffff7f8feaf000, size 20480)

last unloaded kext at 792928517255: com.apple.driver.AppleUSBCDC 4.2.1b5 (addr 0xffffff7f8feab000, size 16384)

loaded kexts:

com.evoluent.driver.VerticalMouseDriver 1.0.10f1

com.iospirit.driver.rbiokithelper 1.21

com.apple.filesystems.smbfs 2.0.2

com.apple.filesystems.afpfs 11.1

com.apple.nke.asp-tcp 8.0.1

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AppleBluetoothMultitouch 80.14

com.apple.driver.AudioAUUC 1.60

com.apple.iokit.IOBluetoothSerialManager 4.2.4f1

com.apple.driver.AGPM 100.14.15

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleMikeyDriver 2.6.1f2

com.apple.driver.AppleUpstreamUserClient 3.5.13

com.apple.driver.AppleHDA 2.6.1f2

com.apple.kext.AMDFramebuffer 1.2.2

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.driver.AppleIntelHD3000Graphics 8.2.4

com.apple.driver.AppleIRController 4000

com.apple.AMDRadeonX3000 1.2.2

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.4f1

com.apple.driver.AppleBacklight 170.3.5

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleLPC 1.7.0

com.apple.driver.AppleMCCSControl 1.1.12

com.apple.driver.AppleSMCLMU 2.0.4d1

com.apple.driver.AppleIntelSNBGraphicsFB 8.2.4

com.apple.kext.AMD6000Controller 1.2.2

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleThunderboltIP 1.1.2

com.apple.iokit.SCSITaskUserClient 3.6.6

com.apple.driver.AppleUSBCardReader 3.4.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 35

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.5.1

com.apple.driver.AppleUSBHub 666.4.0

com.apple.driver.AirPort.Atheros40 700.74.5

com.apple.driver.AppleFWOHCI 5.0.2

com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2

com.apple.driver.AppleAHCIPort 3.0.0

com.apple.driver.AppleUSBEHCI 660.4.0

com.apple.driver.AppleACPIButtons 2.0

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 2.0

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 217.92.1

com.apple.nke.applicationfirewall 153

com.apple.security.quarantine 3

com.apple.driver.AppleIntelCPUPowerManagement 217.92.1

com.apple.security.SecureRemotePassword 1.0

com.apple.driver.AppleBluetoothHIDKeyboard 170.15

com.apple.driver.AppleHIDKeyboard 170.15

com.apple.driver.IOBluetoothHIDDriver 4.2.4f1

com.apple.driver.AppleMultitouchDriver 245.13

com.apple.iokit.IOSerialFamily 10.0.7

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 2.6.1f2

com.apple.vecLib.kext 1.0.0

com.apple.iokit.IOAudioFamily 1.9.7fc2

com.apple.kext.OSvKernDSPLib 1.14

com.apple.iokit.IOSurface 91.1

com.apple.iokit.IOBluetoothFamily 4.2.4f1

com.apple.iokit.IOAcceleratorFamily 98.20

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.4f1

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IONDRVSupport 2.4.1

com.apple.driver.AppleSMBusController 1.0.11d1

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.kext.AMDSupport 1.2.2

com.apple.AppleGraphicsDeviceControl 3.5.26

com.apple.driver.AppleHDAController 2.6.1f2

com.apple.iokit.IOGraphicsFamily 2.4.1

com.apple.iokit.IOHDAFamily 2.6.1f2

com.apple.driver.AppleSMC 3.1.8

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 5.7.0d11

com.apple.iokit.IOFireWireIP 2.2.6

com.apple.driver.AppleThunderboltEDMSink 2.1.3

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.6

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOAHCISerialATAPI 2.6.1

com.apple.driver.AppleThunderboltDPOutAdapter 3.1.7

com.apple.driver.AppleThunderboltDPInAdapter 3.1.7

com.apple.driver.AppleThunderboltDPAdapterFamily 3.1.7

com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5

com.apple.iokit.IOUSBHIDDriver 660.4.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.6

com.apple.iokit.IOUSBMassStorageClass 3.6.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.6

com.apple.driver.AppleUSBMergeNub 650.4.0

com.apple.driver.AppleUSBComposite 656.4.1

com.apple.iokit.IOUSBUserClient 660.4.2

com.apple.driver.AppleThunderboltNHI 2.0.1

com.apple.iokit.IOThunderboltFamily 3.2.7

com.apple.iokit.IO80211Family 630.35

com.apple.iokit.IOFireWireFamily 4.5.5

com.apple.iokit.IOEthernetAVBController 1.0.3b4

com.apple.driver.mDNSOffloadUserClient 1.0.1b5

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOAHCIFamily 2.6.5

com.apple.iokit.IOUSBFamily 677.4.0

com.apple.driver.AppleEFINVRAM 2.0

com.apple.driver.AppleEFIRuntime 2.0

com.apple.iokit.IOHIDFamily 2.0.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 278.11

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.AppleKeyStore 2

com.apple.driver.DiskImages 371.1

com.apple.iokit.IOStorageFamily 1.9

com.apple.iokit.IOReportFamily 23

com.apple.driver.AppleFDEKeyStore 28.30

com.apple.driver.AppleACPIPlatform 2.0

com.apple.iokit.IOPCIFamily 2.9

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.pthread 1

com.apple.kec.corecrypto 1.0