Hi Alex, On Wed, 2019-11-06 at 15:07 +0100, Axel Rau wrote: > I have a new install of Ryzen 7 3700X on a Asrock X470D4U motherboard. > The OS is FreeBSD 12.1. > I try to find out, if ECC enabled. > > On a Xeon E5 CPU, dmidecode shows Total Width: 72 bits und Data Width: 64 > bits. > 72-64=8; These are the 8 parity bits.
Sounds right. > The Ryzen CPU shows Total Width von 128 Bit und Data Width: 64 bits. > > Is this a bug in the Bios or in demidecode or is ECC not enabled? I've seen this only once before, definitely looks like a BIOS bug. ECC is typically +8 bits for 64-bit wide modules. You may want to check if a BIOS update is available for your system, and if not (or if it doesn't solve the problem), report to the manufacturer. > PS: I get: > root@b5:~ # dmidecode -t memory > # dmidecode 3.2 > # SMBIOS entry point at 0xed2b3000 > Found SMBIOS entry point in EFI, reading table from /dev/mem. > SMBIOS 3.2 present. > > Handle 0x000F, DMI type 16, 23 bytes > Physical Memory Array > Location: System Board Or Motherboard > Use: System Memory > Error Correction Type: Multi-bit ECC This says ECC is enabled. > Maximum Capacity: 128 GB > Error Information Handle: 0x000E > Number Of Devices: 4 > > Handle 0x0017, DMI type 17, 84 bytes > Memory Device > Array Handle: 0x000F > Error Information Handle: 0x0016 > Total Width: 128 bits > Data Width: 64 bits > Size: 16384 MB > Form Factor: DIMM > Set: None > Locator: DIMM 0 > Bank Locator: P0 CHANNEL A > Type: DDR4 > Type Detail: Synchronous Unbuffered (Unregistered) > Speed: 2666 MT/s > Manufacturer: Kingston > Serial Number: E72F267D > Asset Tag: Not Specified > Part Number: 9965745-002.A00G Definitely a reference of ECC memory. decode-dimms should say that too. I think your best option is to enter the BIOS setup screen and check the memory configuration there, maybe there's a configuration option to enable/disable ECC, or at the very least it should tell you whether ECC is enabled or not. > Rank: 2 > Configured Memory Speed: 2400 MT/s > Minimum Voltage: 1.2 V > Maximum Voltage: 1.2 V > Configured Voltage: 1.2 V > Memory Technology: DRAM > Memory Operating Mode Capability: Volatile memory > Firmware Version: Unknown > Module Manufacturer ID: Bank 2, Hex 0x98 > Module Product ID: Unknown > Memory Subsystem Controller Manufacturer ID: Unknown > Memory Subsystem Controller Product ID: Unknown > Non-Volatile Size: None > Volatile Size: 16 kB > Cache Size: None > Logical Size: None As a side note, I am collecting SMBIOS 3.2 implementations for my dmidecode test suite, so I would appreciate if you could run "dmidecode --dump-bin" on your system and send me the generated file (privately). Thanks! -- Jean Delvare SUSE L3 Support _______________________________________________ https://lists.nongnu.org/mailman/listinfo/dmidecode-devel
