Masedira, You can find the PCIE Routing Topology below, which shows you the slots and their associated CPU's [IMAGE] What I would suggest is clearing the hardware log and then remove the memory you added, just to test if the error repeats. If not then it may be the dimms, so let me know part numbers if you have them, so I may check on compatibility. I would also reseat the center and left risers, and the cards within. I would also look to see if the system is behind on BIOS, iDrac, and controller as well, if so I would recommend updating as well. Let me know what you see. Here is a page on finding Bus Device Function as well - [URL]  
Hi all, I have a poweredge r620 server. The system was very stable until recently, after added additional RAM modules I get random reboots. I found the following critical errors in the iDRAC logs: 2020-01-08T18:12:58-0400 CPU0704 CPU 1 machine check error detected.2020-01-08T18:12:56-0400 PCI1320 A bus fatal error was detected on a component at bus 1 device 0 function 0.2020-01-08T18:12:51-0400 PCI1320 A bus fatal error was detected on a component at bus 0 device 2 function 0.2020-01-08T18:12:47-0400 PCI1360 A bus fatal error was detected on a component at slot 1.2020-01-08T18:11:33-0400 PCI1360 A bus fatal error was detected on a component at slot 1.2020-01-08T09:29:34-0400 CPU0704 CPU 2 machine check error detected.2020-01-08T09:26:30-0400 CPU0704 CPU 2 machine check error detected.2020-01-08T09:24:57-0400 CPU0704 CPU 2 machine check error detected.2020-01-08T09:24:07-0400 CPU0704 CPU 2 machine check error detected. I am trying to figure out if this error is related to the new memory modules, so I would like to understand the following: 1) how can I know which component is the "component at slot X" 2) what does "CPU machine check error" mean? 3) How can I identify: "bus 1 device 0 function 0."? From the below is the lspci output from esxcli, I would understand that 0:2.0 corresponds to: 0000:00:02.0 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2a [PCIe RP[0000:00:02.0]] What is the PCIe Root Port exactly?   ===================================================== 0000:00:00.0 Host bridge Bridge: Intel Corporation Xeon E5/Core i7 DMI2 [PCIe RP[0000:00:00.0]]Class 0600: 8086:3c00 0000:00:01.0 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1a [PCIe RP[0000:00:01.0]]Class 0604: 8086:3c02 0000:00:01.1 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1b [PCIe RP[0000:00:01.1]]Class 0604: 8086:3c03 0000:00:02.0 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2a [PCIe RP[0000:00:02.0]]Class 0604: 8086:3c04 0000:00:02.2 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2c [PCIe RP[0000:00:02.2]]Class 0604: 8086:3c06 0000:00:03.0 PCI bridge Bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3a in PCI Express Mode [PCIe RP[0000:00:03.0]]Class 0604: 8086:3c08 0000:00:05.0 System peripheral Generic system peripheral: Intel Corporation Xeon E5/Core i7 Address Map, VTd_Misc, System ManagementClass 0880: 8086:3c28 0000:00:05.2 System peripheral Generic system peripheral: Intel Corporation Xeon E5/Core i7 Control Status and Global ErrorsClass 0880: 8086:3c2a 0000:00:11.0 PCI bridge Bridge: Intel Corporation C600/X79 series chipset PCI Express Virtual Root Port [PCIe RP[0000:00:11.0]]Class 0604: 8086:1d3e 0000:00:16.0 Communication controller Communication controller: Intel Corporation C600/X79 series chipset MEI Controller #1Class 0780: 8086:1d3a 0000:00:16.1 Communication controller Communication controller: Intel Corporation C600/X79 series chipset MEI Controller #2Class 0780: 8086:1d3b 0000:00:1a.0 USB controller Serial bus controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #2 [vmhba32]Class 0c03: 8086:1d2d 0000:00:1c.0 PCI bridge Bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 1 [PCIe RP[0000:00:1c.0]]Class 0604: 8086:1d10 0000:00:1c.7 PCI bridge Bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 8 [PCIe RP[0000:00:1c.7]]Class 0604: 8086:1d1e 0000:00:1d.0 USB controller Serial bus controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #1 [vmhba33]Class 0c03: 8086:1d26 0000:00:1e.0 PCI bridge Bridge: Intel Corporation 82801 PCI BridgeClass 0604: 8086:244e 0000:00:1f.0 ISA bridge Bridge: Intel Corporation C600/X79 series chipset LPC ControllerClass 0601: 8086:1d41 0000:00:1f.2 SATA controller Mass storage controller: Intel Corporation Patsburg 6 Port SATA AHCI Controller [vmhba0]Class 0106: 8086:1d02 0000:01:00.0 Ethernet controller Network controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet [vmnic0]Class 0200: 14e4:165f 0000:01:00.1 Ethernet controller Network controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet [vmnic1]Class 0200: 14e4:165f 0000:02:00.0 Ethernet controller Network controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet [vmnic2]Class 0200: 14e4:165f 0000:02:00.1 Ethernet controller Network controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet [vmnic3]Class 0200: 14e4:165f 0000:03:00.0 RAID bus controller Mass storage controller: Avago (LSI) PERC H710 Mini (for monolithics) [vmhba1]Class 0104: 1000:005b 0000:04:00.0 Ethernet controller Network controller: Chelsio Communications Inc S320-LP-CR 10GbE Dual Port AdapterClass 0200: 1425:0036 0000:05:00.0 PCI bridge Bridge: Integrated Device Technology, Inc. [IDT] PES12T3G2 PCI Express Gen2 SwitchClass 0604: 111d:8061 0000:06:02.0 PCI bridge Bridge: Integrated Device Technology, Inc. [IDT] PES12T3G2 PCI Express Gen2 SwitchClass 0604: 111d:8061 0000:06:04.0 PCI bridge Bridge: Integrated Device Technology, Inc. [IDT] PES12T3G2 PCI Express Gen2 SwitchClass 0604: 111d:8061
A bus fatal error was detected on a component at slot 1