Kernel panic recurring I keep getting the following kernel panic. Can anyone help me, please? As a test I have just change HDD to SSD and update memory from 2 GB to 8 GB. All said to be compatible with Mac. Upgraded OS X to Mountain Lion. Clean install from USB stick. Still the kernel panic happens a lot. What seems to be wrong?

Interval Since Last Panic Report:  1537 sec
Panics Since Last Report:          1


Tue May 21 21:49:37 2013
panic(cpu 0 caller 0xffffff801d0b7e95): Kernel trap at 0xffffff80f8b8be80, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff80f8b8be80, CR3: 0x000000001fd46000, CR4: 0x0000000000000660
RAX: 0x0000000000b672b1, RBX: 0x0000011445eda085, RCX: 0xffffff802f6c2000, RDX: 0xffffff802f6ce800
RSP: 0xffffff80f8b8bdd8, RBP: 0x0000000000000000, RSI: 0x0000000000b672b1, RDI: 0x0000000000000000
R8:  0xffffff801d601ef0, R9:  0x7ffffffffffffffe, R10: 0x0000000000008611, R11: 0x00000000ffffff80
R12: 0x7fffffffffffffff, R13: 0x000003b8e5dab7ad, R14: 0xffffff80f8b5c148, R15: 0x0000000000000005
RFL: 0x0000000000010096, RIP: 0xffffff80f8b8be80, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0xffffff80f8b8be80, Error code: 0x0000000000000011, Fault CPU: 0x0 Kernel NX fault

Backtrace (CPU 0), Frame : Return Address
0xffffff80f8b8ba70 : 0xffffff801d01d626 
Model: MacBookPro5,5, BootROM MBP55.00AC.B03, 2 processors, Intel Core 2 Duo, 2.26 GHz, 8 GB, SMC 1.47f2
Graphics: NVIDIA GeForce 9400M, NVIDIA GeForce 9400M, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x859B, 0x435434473353313036374D2E4D3136464400
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x859B, 0x435434473353313036374D2E4D3136464400
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (5.106.98.100.16)
Bluetooth: Version 4.1.3f3 11349, 2 service, 11 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: KINGSTON SH103S3120G, 120,03 GB
Serial ATA Device: HL-DT-ST DVDRW  GS23N
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0x24400000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26500000 / 2
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0x04600000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2
USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x06100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8213, 0x06110000 / 3
Apple Support has a page on Kernel Panics, including troubleshooting repeated KPs. 

In my experience, they most often have to do with hardware changes / external mounting and unmounting, but of course YMMV.