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[i2c-tools] cannot read SPD on B360 board


Hi,

I'm having a problem with my RAM.
Memtest fails.

thats why I wanted to read the SPD but this failed.
Fails with different Brand RAM modules.
So it appears to be related to the board.


Passmark Memtest86 7.5 cannot read the SPD either.
not sure if windows programs work. will test.

any idea what's wrong?

thanks


System: kubuntu 18.4
Kernel:tes 4.15.0-23-generic
Board: gigabyte B360M D3H latest BIOS F4
CPU: i3-8100
i2c-tools Version 4.0-2


I did a modprobe for i2c-i801 and eeprom, then

$ sudo i2cdetect -l 

i2c-3   i2c             i915 gmbus dpd
i2c-1   i2c             i915 gmbus dpc
i2c-6   smbus           SMBus I801 adapter at efa0
i2c-4   i2c             DPDDC-B
i2c-2   i2c             i915 gmbus misc
i2c-0   i2c             i915 gmbus dpb
i2c-5   i2c             DPDDC-E 
 
 


$ decode-dimms
# decode-dimms version $Revision$

Memory Serial Presence Detect Decoder
By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
Jean Delvare, Trent Piepho and others


Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/6-0050
Guessing DIMM is in                              bank 1

---=== SPD EEPROM Information ===---
EEPROM CRC of bytes 0-125                        OK (0xE542)
# of bytes written to SDRAM EEPROM               256
Total number of bytes in EEPROM                  512
Fundamental Memory type                          Unknown (0x0c)

---=== Manufacturing Information ===---
Manufacturer                                     Synertek
Custom Manufacturer Data                         36 16 36 00 00 2B 0C 
("6?6??+?")
Manufacturing Location Code                      0x2B
Part Number                                      Undefined

Number of SDRAM DIMMs detected and decoded: 1


$ sudo i2cdetect 6
WARNING! This program can confuse your I2C bus, cause data loss and 
worse! 

I will probe file /dev/i2c-6. 
 

I will probe address range 0x03-0x77. 
 

Continue? [Y/n] 
 

      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f 
 

00:          -- -- -- -- -- 08 -- -- -- -- -- -- -- 
 

10: 10 -- -- -- -- 15 -- -- -- -- -- -- -- -- -- -- 
 

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 31 32 -- 34 35 36 -- -- -- -- -- -- -- -- --
40: 40 -- -- -- 44 -- -- -- -- -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --