You can check out crucial.com, they have a memory checker application to give you specific information. If in using that you use their RAM chip it is guaranteed to be compatible, if it isn’t they will change it.
In all of the time I have been using computers I have never had to change the motherboard batter. In most cased the battery will outlast the system, it has nothing to do with the type of RAM you have. Normally you will see the date and time being wildly out if the CMOS battery is in poor condition.
many thanks for the reply, so if i were to change the battery when time and date are inaccurate, things will go back to normal without any adverse effects ?
Time ago I found some rare memory sticks there and did not have any trouble with them or their service.
If time and date are inaccurate because a bad battery, yes, things will go back to normal. Be aware that BIO settings will reverse back to default though.
It is so unusual to see the battery so low as to make the date and time, not just inaccurate but wildly out of date and manually correcting the time doesn’t last long, we are not talking seconds or minutes hers but hours/days and sometimes months or years.
So you would know if the battery was on the way out, so replacing it would correct it, if that were the case. Of course once replaced you would have to reset the date and time.