iMac memory installation problem

Hi,

I'm trying to install a memory upgrade into a 20-inch 2007 iMac Model identifier: iMac 7,1 2007 model.

AFAIK, it should use SODDR 667Mhz PC5300 modules.

It currently uses one 1GB module.

I'm installing TWO 2 GB modules, but as soon as I install the module and boot the Mac, I get a panic grey screen with the following report, that I guess has something ot do with the 2GB memory modules.

I have already installed memory modules into other Macs, I think I know how to do it (and BTW, on this iMac it's pretty impossible to install memory modules the wrong way, I think...).

What's wrong?

Interval Since Last Panic Report: 47525 sec

Panics Since Last Report: 1

Anonymous UUID: 756B67D9-BDCA-4BF8-AF99-390977BB1EC4

Thu Apr 24 12:44:38 2014

panic(cpu 0 caller 0x2abf6a): Kernel trap at 0x00290bb6, type 14=page fault, registers:

CR0: 0x80010033, CR2: 0x0000000c, CR3: 0x058e5000, CR4: 0x00000660

EAX: 0x00000630, EBX: 0x00000000, ECX: 0x00802844, EDX: 0x00849dc0

CR2: 0x0000000c, EBP: 0x5d433be8, ESI: 0x1512b003, EDI: 0x002a0577

EFL: 0x00010202, EIP: 0x00290bb6, CS: 0x00000008, DS: 0x05730010

Error code: 0x00000000

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)

0x5d4339b8 : 0x21b837 (0x5dd7fc 0x5d4339ec 0x223ce1 0x0)

0x5d433a08 : 0x2abf6a (0x59e3d0 0x290bb6 0xe 0x59e59a)

0x5d433ae8 : 0x2a1a78 (0x5d433b00 0x0 0x5d433be8 0x290bb6)

0x5d433af8 : 0x290bb6 (0xe 0x48 0x5d430010 0x2a0010)

0x5d433be8 : 0x2931b5 (0x7de4cb0 0x7b400000 0x1 0x0)

0x5d433d78 : 0x255994 (0x7de4cb0 0x7b400000 0x1 0x1516b)

0x5d433de8 : 0x2589af (0x390a614 0x7de4cb0 0x7b400000 0x1)

0x5d433f38 : 0x2ab83c (0x29be520 0x7b400000 0x1 0x3)

0x5d433fc8 : 0x2a18da (0x7dea124 0x0 0x10 0x0)

BSD process name corresponding to current thread: fsck_hfs

Mac OS version:

10K549

Kernel version:

Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386

System model name: iMac7,1 (Mac-F4238CC8)

System uptime in nanoseconds: 2792949140

unloaded kexts:

(none)

loaded kexts:

com.apple.driver.AppleIRController 303.8 - last loaded 977002417

com.apple.driver.CSRHIDTransitionDriver 2.4.5f3

com.apple.iokit.SCSITaskUserClient 2.6.8

com.apple.iokit.IOAHCIBlockStorage 1.6.4

com.apple.BootCache 31.1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.driver.AppleUSBHub 4.2.4

com.apple.driver.AppleHPET 1.5

com.apple.driver.AppleFWOHCI 4.7.3

com.apple.driver.AppleAHCIPort 2.1.7

com.apple.driver.AppleIntelPIIXATA 2.5.1

com.apple.iokit.AppleYukon2 3.2.1b1

com.apple.driver.AirPortBrcm43xx 423.91.27

com.apple.driver.AirPortBrcm43224 428.42.4

com.apple.driver.AppleUSBEHCI 4.2.4

com.apple.driver.AppleUSBUHCI 4.2.0

com.apple.driver.AppleEFINVRAM 1.4.0

com.apple.driver.AppleRTC 1.3.1

com.apple.driver.AppleACPIButtons 1.3.6

com.apple.driver.AppleSMBIOS 1.7

com.apple.driver.AppleACPIEC 1.3.6

com.apple.driver.AppleAPIC 1.4

com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0

com.apple.security.sandbox 1

com.apple.security.quarantine 0

com.apple.nke.applicationfirewall 2.1.14

com.apple.driver.AppleIntelCPUPowerManagement 142.6.0

com.apple.iokit.IOUSBHIDDriver 4.2.0

com.apple.driver.AppleUSBMergeNub 4.2.4

com.apple.driver.AppleUSBComposite 3.9.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8

com.apple.iokit.IOBDStorageFamily 1.6

com.apple.iokit.IODVDStorageFamily 1.6

com.apple.iokit.IOCDStorageFamily 1.6.1

com.apple.driver.XsanFilter 402.1

com.apple.iokit.IOATAPIProtocolTransport 2.5.1

com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8

com.apple.driver.AppleFileSystemDriver 2.0

com.apple.iokit.IOUSBUserClient 4.2.4

com.apple.iokit.IOFireWireFamily 4.2.6

com.apple.iokit.IOAHCIFamily 2.0.6

com.apple.iokit.IOATAFamily 2.5.1

com.apple.iokit.IO80211Family 320.1

com.apple.iokit.IONetworkingFamily 1.10

com.apple.iokit.IOUSBFamily 4.2.4

com.apple.driver.AppleEFIRuntime 1.4.0

com.apple.iokit.IOHIDFamily 1.6.6

com.apple.iokit.IOSMBusFamily 1.1

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 6

com.apple.driver.DiskImages 289.1

com.apple.iokit.IOStorageFamily 1.6.3

com.apple.driver.AppleACPIPlatform 1.3.6

com.apple.iokit.IOPCIFamily 2.6.5

com.apple.iokit.IOACPIFamily 1.3.0

Model: iMac7,1, BootROM IM71.007A.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 1 GB, SMC 1.20f4

Graphics: ATI Radeon HD 2600 Pro, ATI,RadeonHD2600, PCIe, 256 MB

Memory Module: global_name

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x88), Broadcom BCM43xx 1.0 (5.10.131.42.4)

Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Network Service: FireWire, FireWire, fw0

Network Service: AirPort, AirPort, en1

Serial ATA Device: WDC WD3200AAJS-40RYA0, 298,09 GB

Parallel ATA Device: MATSHITADVD-R UJ-85J

USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0xfd400000 / 2

USB Device: Hub in Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x1002, 0x1a200000 / 3

USB Device: Apple Optical USB Mouse, 0x05ac (Apple Inc.), 0x0302, 0x1a220000 / 5

USB Device: Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x0205, 0x1a210000 / 4

USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x1a100000 / 2

USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0x5d100000 / 2