Hi there, I not sure if this forum is the right place to post this but I hope someone here can help me. I've been suffering intermittent system lockups wif my new rig. From the event viewer I gather these Event ID: 123 errors which are always the same, I'll list 2 example here: ----------------------------------------------------------------- 1st error:- ----------------- Event ID: 123 Source: WMIxWDM Machine Check Event reported is a fatal Bus or Interconnect timeout error. Memory Hierarchy Level: 3 Participation: 3 Request Type: 0 Memory/IO: 3 Address: 0 0000: 01 00 00 00 01 00 00 00 ........ 0008: dc 69 88 8f 6f 89 ca 01 Üiˆo‰Ê. 0010: 00 00 00 00 00 00 00 00 ........ 0018: 04 00 00 00 00 00 00 00 ........ 0020: 0f 0f 07 00 00 00 00 f2 .......ò 0028: 00 00 00 00 00 00 00 00 ........ 0030: 00 00 00 00 00 00 00 00 ........ 0038: 00 00 00 00 00 00 00 00 ........ 0040: 00 00 00 00 00 00 00 00 ........ 0048: 00 00 00 00 00 00 00 00 ........ 0050: 00 00 00 00 00 00 00 00 ........ 0058: 00 00 00 00 00 00 00 00 ........ 0060: 00 00 00 00 00 00 00 00 ........ 0068: 00 00 00 00 00 00 00 00 ........ 0070: 00 00 00 00 00 00 00 00 ........ 0078: 00 00 00 00 00 00 00 00 ........ 0080: 00 00 00 00 00 00 00 00 ........ 0088: 00 00 00 00 00 00 00 00 ........ 0090: 00 00 00 00 00 00 00 00 ........ 0098: 00 00 00 00 00 00 00 00 ........ 00a0: 00 00 00 00 00 00 00 00 ........ 00a8: 00 00 00 00 00 00 00 00 ........ 00b0: 00 00 00 00 00 00 00 00 ........ 00b8: 00 00 00 00 00 00 00 00 ........ 00c0: 00 00 00 00 00 00 00 00 ........ 00c8: 00 00 00 00 00 00 00 00 ........ 00d0: 00 00 00 00 00 00 00 00 ........ 00d8: 00 00 00 00 00 00 00 00 ........ 00e0: 00 00 00 00 00 00 00 00 ........ 00e8: 00 00 00 00 00 00 00 00 ........ 00f0: 00 00 00 00 00 00 00 00 ........ 00f8: 00 00 00 00 00 00 00 00 ........ ------------ 2nd error ------------ Event ID: 123 Source: WMIxWDM Machine Check Event reported is a fatal Bus or Interconnect timeout error. Memory Hierarchy Level: 3 Participation: 3 Request Type: 0 Memory/IO: 3 Address: 0 0000: 01 00 00 00 01 00 00 00 ........ 0008: 7a 9a e9 16 63 89 ca 01 zšé.c‰Ê. 0010: 00 00 00 00 00 00 00 00 ........ 0018: 04 00 00 00 00 00 00 00 ........ 0020: 0f 0f 07 00 00 00 00 f2 .......ò 0028: 00 00 00 00 00 00 00 00 ........ 0030: 00 00 00 00 00 00 00 00 ........ 0038: 00 00 00 00 00 00 00 00 ........ 0040: 00 00 00 00 00 00 00 00 ........ 0048: 00 00 00 00 00 00 00 00 ........ 0050: 00 00 00 00 00 00 00 00 ........ 0058: 00 00 00 00 00 00 00 00 ........ 0060: 00 00 00 00 00 00 00 00 ........ 0068: 00 00 00 00 00 00 00 00 ........ 0070: 00 00 00 00 00 00 00 00 ........ 0078: 00 00 00 00 00 00 00 00 ........ 0080: 00 00 00 00 00 00 00 00 ........ 0088: 00 00 00 00 00 00 00 00 ........ 0090: 00 00 00 00 00 00 00 00 ........ 0098: 00 00 00 00 00 00 00 00 ........ 00a0: 00 00 00 00 00 00 00 00 ........ 00a8: 00 00 00 00 00 00 00 00 ........ 00b0: 00 00 00 00 00 00 00 00 ........ 00b8: 00 00 00 00 00 00 00 00 ........ 00c0: 00 00 00 00 00 00 00 00 ........ 00c8: 00 00 00 00 00 00 00 00 ........ 00d0: 00 00 00 00 00 00 00 00 ........ 00d8: 00 00 00 00 00 00 00 00 ........ 00e0: 00 00 00 00 00 00 00 00 ........ 00e8: 00 00 00 00 00 00 00 00 ........ 00f0: 00 00 00 00 00 00 00 00 ........ 00f8: 00 00 00 00 00 00 00 00 ........ -------------------------------------------------------- Using AMD's MCAT I gather these info for the above 2 errors --------------------- Event Source 0 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8963 16E99A7A Error Status (0x): F2000000 00070F0F Single bit errors: Processor state corrupted by error Error reporting enabled Error not corrected Second error Error valid Bus Error Code: Participation processor: Generic Time-out: Request timed out (TIMOUT) Memory transaction type: Generic error (GEN) I/O: Generic (GEN) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x7 - Watchdog Timeout Error Error Code: 0x0F0F Generic (GEN) Generic error (GEN), on Generic (LG) cache Special WDTO Error decode: MC4_ADDR (0x): 00000000 00000000 HyperTransport Command: 0x0 NOP Operation Type : 0x0 - Normal operation Next Action : 0x0 - Complete Source Pointer : 0x0 - Host bridge on local node Source Unit ID : 0x0 Source Node ID : 0x0 Destination Unit ID : 0x0 Destination Node ID : 0x0 Wait For Posted Write : 0x0 Wait Code : 0x0 System Response Count : 0x0 GART TblWk in Progress: 0x0 --------------------------- Event Source 1 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA896F 8F8869DC Error Status (0x): F2000000 00070F0F Single bit errors: Processor state corrupted by error Error reporting enabled Error not corrected Second error Error valid Bus Error Code: Participation processor: Generic Time-out: Request timed out (TIMOUT) Memory transaction type: Generic error (GEN) I/O: Generic (GEN) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x7 - Watchdog Timeout Error Error Code: 0x0F0F Generic (GEN) Generic error (GEN), on Generic (LG) cache Special WDTO Error decode: MC4_ADDR (0x): 00000000 00000000 HyperTransport Command: 0x0 NOP Operation Type : 0x0 - Normal operation Next Action : 0x0 - Complete Source Pointer : 0x0 - Host bridge on local node Source Unit ID : 0x0 Source Node ID : 0x0 Destination Unit ID : 0x0 Destination Node ID : 0x0 Wait For Posted Write : 0x0 Wait Code : 0x0 System Response Count : 0x0 GART TblWk in Progress: 0x0 ---------------------------- Can anyone advise me what the problem is? My rig: AMD Phenom II X945 Asus M4A79XTD EVO mobo 8 GB Kingston Value ram (occupying all 4 slots) ATI Radeon HD5850 GFX card 2 x SATA HDD Thank you for reading & helping. cheers

After swapping the ram sticks around, I've gotton some new errors. Event ID: 122 Source: WMIxWDM Event ID: 106 Source: WMIxWDM MCAY translate it as: --- Event Source 8 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8AE3 3B891CB2 Error Status (0x): F45BA000 15080A13 Error Address (0x): 00000000 0068C110 Single bit errors: Uncorrectable ECC error Error address valid in MCi_ADDR Error reporting enabled Error not corrected Second error Error valid Bus Error Code: Participation processor: Local node responded to the request (RES) Time-out: Request did not time out Memory transaction type: Generic read (RD) I/O: DRAM memory access (MEM) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x8 - ChipKill ECC Error Error Code: 0x0A13 DRAM memory access (MEM) Generic read (RD), on Generic (LG) cache ChipKill Syndrome: 0x15B7 Error address at 6 MB Address decode: Node ID0, Chip Select0, Logical DIMM0 --- Event Source 9 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8AE3 C6C24E34 Error Status (0x): F4242000 88080A13 Error Address (0x): 00000000 0069A110 Single bit errors: Uncorrectable ECC error Error address valid in MCi_ADDR Error reporting enabled Error not corrected Second error Error valid Bus Error Code: Participation processor: Local node responded to the request (RES) Time-out: Request did not time out Memory transaction type: Generic read (RD) I/O: DRAM memory access (MEM) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x8 - ChipKill ECC Error Error Code: 0x0A13 DRAM memory access (MEM) Generic read (RD), on Generic (LG) cache ChipKill Syndrome: 0x8848 Error address at 6 MB Address decode: Node ID0, Chip Select0, Logical DIMM0 --- Event Source 10 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8AE4 0E4B3C8E Error Status (0x): 9410C000 E8080A13 Error Address (0x): 00000000 0068C110 Single bit errors: Correctable ECC error Error address valid in MCi_ADDR Error reporting enabled Error valid Bus Error Code: Participation processor: Local node responded to the request (RES) Time-out: Request did not time out Memory transaction type: Generic read (RD) I/O: DRAM memory access (MEM) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x8 - ChipKill ECC Error Error Code: 0x0A13 DRAM memory access (MEM) Generic read (RD), on Generic (LG) cache ChipKill Syndrome: 0xE821 Error address at 6 MB Address decode: Node ID0, Chip Select0, Logical DIMM0 --- Event Source 11 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8AE4 79950E8E Error Status (0x): 9410C000 E8080A13 Error Address (0x): 00000000 0068C110 Single bit errors: Correctable ECC error Error address valid in MCi_ADDR Error reporting enabled Error valid Bus Error Code: Participation processor: Local node responded to the request (RES) Time-out: Request did not time out Memory transaction type: Generic read (RD) I/O: DRAM memory access (MEM) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x8 - ChipKill ECC Error Error Code: 0x0A13 DRAM memory access (MEM) Generic read (RD), on Generic (LG) cache ChipKill Syndrome: 0xE821 Error address at 6 MB Address decode: Node ID0, Chip Select0, Logical DIMM0 --- Event Source 12 - WMIxWDM Processor Number : 0 Bank Number : 4 Time Stamp (0x): 01CA8AE4 FF676C28 Error Status (0x): F40A2000 38080A13 Error Address (0x): 00000000 0068C110 Single bit errors: Uncorrectable ECC error Error address valid in MCi_ADDR Error reporting enabled Error not corrected Second error Error valid Bus Error Code: Participation processor: Local node responded to the request (RES) Time-out: Request did not time out Memory transaction type: Generic read (RD) I/O: DRAM memory access (MEM) Cache level: Generic (LG) North Bridge Error MC4: Extended Error Code: 0x8 - ChipKill ECC Error Error Code: 0x0A13 DRAM memory access (MEM) Generic read (RD), on Generic (LG) cache ChipKill Syndrome: 0x3814 Error address at 6 MB Address decode: Node ID0, Chip Select0, Logical DIMM0 ---------- Does this mean one of my ram stick is bad? cheers