I can do it whith a P620.
To You can may be do it with diag and the technical documentation of your S70.
> diag
>>Task Selection (Diagnostics, Advanced Diagnostics, Service Aids, etc.)
>>>Display Hardware Vital Product Data
>>>>mem0 00-00 Memory
....
Name: IBM,memory-module
Node: IBM,memory-module@1
Physical Location: P1-M1.1
Memory Dimm:
Customer Card ID Number.....300E
EC Level....................0000
FRU Number..................0000009P3935
Serial Number...............00025060