Loki
December 6, 2023, 7:40pm
1
I’ve recently purchased this RAM: https://semiconductor.samsung.com/dram/module/rdimm/m393a8g40ab2-cwe/
However the PC won’t boot when I plug it in. The motherboard displays the letters “FF” and it won’t show an image on the monitor.
My questions are: Is the RAM simply incompatible?
If so, what RAM would be compatble?
Edit: This is what I’m using: https://www.ipi.wiki/products/ampere-altra-developer-platform
1 Like
Aaron
December 7, 2023, 10:41pm
2
@bexcran @q66 or other ADP experts out there: Any chance one of you happen know the answer to this?
bexcran
December 7, 2023, 10:45pm
3
@Aaron That RAM is on the Ampere Altra AVL (https://connect-admin.amperecomputing.com/api/secure-file-download/download-regular/?file=Altra_Family_AVL_January_2023_b29efeedaf.pdf ), so it should work.
The next step would probably be to connect to the serial port, because the DDR initialization/training code displays its output there, and should be reporting an error.
3 Likes
bexcran
December 7, 2023, 10:47pm
4
My basic questions would be: are the DIMMs properly seated?
Are they installed in the correct slots, according to the page at aadp-docs – I-Pi SMARC ?
3 Likes
Loki
December 8, 2023, 1:42pm
5
@bexcran Thanks for reply.
All six channels are occupied. I’ve replaced the ones in memory channel 1 and 4 with the RAM linked in the post.
(1 and 4 have the new RAM)
(2,3,5,6 have the original RAM)
I can look at the serial output tomorrow.
With kind regards,
Loki
1 Like
Loki
December 9, 2023, 8:24pm
6
@bexcran Here’s a follow up:
NOTICE: DRAM FW version 211207
CP: 0ff00900
MEMC param:
mcu_enable_mask = 00000077 [default: 000000ff]
MCU param:
rtt_wr_s1 = 00000000 [default: 20020000]
rtt_nom_s1 = 00000000 [default: 31060177]
rtt_park_s1 = 00000000 [default: 30060070]
DRAM populated DIMMs:
SK0 MC0 S0: RDIMM[ce:80] 64GB 3200 ECC 2R x4 RCD[32:86] M393A8G40AB2-CWE
SK0 MC1 S0: RDIMM[4f:01] 16GB 3200 ECC 1R x8 RCD[9d:86] TS2GHR72V2E3
SK0 MC2 S0: RDIMM[4f:01] 16GB 3200 ECC 1R x8 RCD[9d:86] TS2GHR72V2E3
SK0 MC4 S0: RDIMM[ce:80] 64GB 3200 ECC 2R x4 RCD[32:86] M393A8G40AB2-CWE
SK0 MC5 S0: RDIMM[4f:01] 16GB 3200 ECC 1R x8 RCD[9d:86] TS2GHR72V2E3
SK0 MC6 S0: RDIMM[4f:01] 16GB 3200 ECC 1R x8 RCD[9d:86] TS2GHR72V2E3
CP: 3ff00100
CP: 3ff00200
CP: 00f01902
CP: 01f01902
ERR: Mismatch Capacity MCU1
ERR: 81f05923
ERR: 81f05800
ERR: 8ff0c500
CP: 3ff00800
ERR: bff0c100
ERROR: SK[0]: 00110002
ERROR: MC[1]: 00f10081
ERROR: Non-identical DIMM mixture NOT supported!
As you can see, the error message is quite clear. I cannot mix the RAM that came shipped with my PC and the recently purchased RAM.
The solution is therefore pretty obvious: Buy more RAM. I was going to replace them all with 64GB RAM anyway, I just can’t do it gradually.
2 Likes
Loki
January 4, 2024, 10:16pm
7
@bexcran
Here’s a final follow up:
Thank you very much for your help. You saved me a lot of trouble.
-/oyddmdhs+:. loki@hq
-odNMMMMMMMMNNmhy+-` -------
-yNMMMMMMMMMMMNNNmmdhy+- OS: Gentoo Linux aarch64
`omMMMMMMMMMMMMNmdmmmmddhhy/` Host: Ampere Altra Developer Platform ES2
omMMMMMMMMMMMNhhyyyohmdddhhhdo` Kernel: 6.1.66-gentoo-dist
.ydMMMMMMMMMMdhs++so/smdddhhhhdm+` Uptime: 23 mins
oyhdmNMMMMMMMNdyooydmddddhhhhyhNd. Packages: 697 (emerge)
:oyhhdNNMMMMMMMNNNmmdddhhhhhyymMh Shell: bash 5.1.16
.:+sydNMMMMMNNNmmmdddhhhhhhmMmy Resolution: 1280x1024
/mMMMMMMNNNmmmdddhhhhhmMNhs: WM: i3
`oNMMMMMMMNNNmmmddddhhdmMNhs+` Theme: Adwaita [GTK2/3]
`sNMMMMMMMMNNNmmmdddddmNMmhs/. Icons: Adwaita [GTK2/3]
/NMMMMMMMMNNNNmmmdddmNMNdso:` Terminal: kitty
+MMMMMMMNNNNNmmmmdmNMNdso/- CPU: ARM Neoverse-N1 (96) @ 2.800GHz
yMMNNNNNNNmmmmmNNMmhs+/-` GPU: NVIDIA GeForce RTX 4090
/hMMNNNNNNNNMNdhs++/-` Memory: 1.73GiB / 376.69GiB (0%)
`/ohdmmddhys+++/:.`
`-//////:--.
sudo dmidecode -t 17
# dmidecode 3.5
Getting SMBIOS data from sysfs.
SMBIOS 3.3.0 present.
Handle 0x0022, DMI type 17, 92 bytes
Memory Device
Array Handle: 0x0021
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 64 GB
Form Factor: DIMM
Set: None
Locator: Socket 0 DIMM 0
Bank Locator: Bank 0
Type: DDR4
Type Detail: Registered (Buffered)
Speed: 3200 MT/s
Manufacturer: Samsung
Serial Number: <Redacted>
Asset Tag: Array 0 Asset Tag 0
Part Number: M393A8G40AB2-CWE
Rank: 2
Configured Memory Speed: 3200 MT/s
Minimum Voltage: 1.14 V
Maximum Voltage: 1.26 V
Configured Voltage: 1.2 V
Memory Technology: DRAM
Memory Operating Mode Capability: None
Firmware Version: Not Specified
Module Manufacturer ID: Unknown
Module Product ID: Unknown
Memory Subsystem Controller Manufacturer ID: Unknown
Memory Subsystem Controller Product ID: Unknown
Non-Volatile Size: None
Volatile Size: None
Cache Size: None
Logical Size: None
All six memory modules are identical.
1 Like