Upgrade mid-2009 MBP to 8GB RAM results in kernel panics

Question

I recently replaced the 2x2G dimms in my mbp with 2x4G.  What I took out was factory installed Micron memory, 1066 DDR3.  I replaced them with Crucial memory of the same specs: http://www.amazon.com/gp/product/B008LTBJFMImmediately upon installing the new memory I would get occasional kernel panics (i.e. I would get this screen: http://support.apple.com/kb/TS4636).Expecting some bad memory, I let memtest86 run overnight.  No errors.  Re-seeded the memory and kept using it, but still got kernel panics. I put the original 2x2G dimms back in... solid for a few days.  Figuring it must be bad RAM despite the memtest86 results I sent the memory back and got a replacement.  Unfortunately, I&#x27;m still seeing occasional kernel panics with the replacements.  I haven&#x27;t been able to detect any kind of pattern of when it&#x27;ll happen.  There might have been some updates since before things started, but I&#x27;ve kept the software the same since seeing the old dimms work solid for a few days.Assuming that I didn&#x27;t get bad memory two times in a row, any ideas what the problem could be?  Is my MBP (specs below) just not compatible with the memory I got (link above)?Any help would be appreciated.  Let me know if I can provide more information.Hardware Overview:  Model Name:          MacBook Pro  Model Identifier:          MacBookPro5,5  Processor Name:          Intel Core 2 Duo  Processor Speed:          2.53 GHz  Number of Processors:          1  Total Number of Cores:          2  L2 Cache:          3 MB  Memory:          8 GB  Bus Speed:          1.07 GHz  Boot ROM Version:          MBP55.00AC.B03  SMC Version (system):          1.47f2  Serial Number (system):          W8925ANF66E  Hardware UUID:          34F65C06-3A2E-5423-8BDE-9B1BD6E968DC  Sudden Motion Sensor:  State:          EnabledMemory Slots:  ECC:          DisabledBANK 0/DIMM0:  Size:          4 GB  Type:          DDR3  Speed:          1067 MHz  Status:          OK  Manufacturer:          0x859B  Part Number:          0x435434473353313036374D2E4D3136464B44  Serial Number:          -BANK 1/DIMM0:  Size:          4 GB  Type:          DDR3  Speed:          1067 MHz  Status:          OK  Manufacturer:          0x859B  Part Number:          0x435434473353313036374D2E4D3136464B44  Serial Number:          -

jaredcasper · Answer

I should also mention, the logs from the panics generally list kernel_task as the current thread when the panic happened, but not always.  There are a number of other programs (WindowServer, Google Chrome, mds_stores, etc.)  The back trace is almost never informative enough to list a process, but when it does it is generally in some com.apple.driver.The panic almost always looks like:panic(cpu 0 caller 0xffffff8017edbe7e): Kernel trap at 0xffffff8017ed3efd, type 14&#x3D;page fault, registers:CR0: 0x0000000080010033, CR2: 0xfffffe284002bc70, CR3: 0x0000000036908000, CR4: 0x0000000000000660RAX: 0xffffff80184d4a28, RBX: 0xffffff810002bc70, RCX: 0xfffffec840000000, RDX: 0xfffffea740000000RSP: 0xffffff810002bbf0, RBP: 0xffffff810002bc60, RSI: 0x00000000183044d4, RDI: 0x0000000000000001R8:  0x0000000000000000, R9:  0x0000000000000000, R10: 0x000000007ab31600, R11: 0x0000000000000400R12: 0x0000000000000000, R13: 0xffffff802b4874e0, R14: 0x0000000000000014, R15: 0xfffffe284002bc70RFL: 0x0000000000010283, RIP: 0xffffff8017ed3efd, CS:  0x0000000000000008, SS:  0x0000000000000010Fault CR2: 0xfffffe284002bc70, Error code: 0x0000000000000000, Fault CPU: 0x0But one time I got this:panic(cpu 0 caller 0xffffff800f654d05): "a freed zone element has been modified: expected 0xffffff802597f780 but found 0xfffffb802597f780, bits changed 0x40000000000, at offset 0 of 240 in zone: maps"@/SourceCache/xnu/xnu-2422.92.1/osfmk/kern/zalloc.c:461Which certainly looks like memory corruption.

Harshaw10 · Answer

Did you every find a solution to this? I&#x27;m having the same problems now.