are these two modules interchangeable?

[Michael Butash]

It will usually figure out some level of compatibility that it *will* work,
until you start getting weird segfaults or crashes for no apparent reason.
My new used laptop came with mismatched 2x2 16gb sticks and *worked*, but
not something I want to test with 128gb of ram going into it when I tend to
actually use it.

I've dealt with it a few times in my life that it's worth some expense to
avoid all that with matched sticks.

-mb



On Thu, Sep 15, 2022 at 11:08 AM Stephen Partington via PLUG-discuss <
plug-discuss at lists.phxlinux.org> wrote:

> Some laptops and NUC's are single channel or will default to that if they
> cannot match for dual channel compatibility.
>
> On Thu, Sep 15, 2022 at 2:07 PM Michael via PLUG-discuss <
> plug-discuss at lists.phxlinux.org> wrote:
>
>> interesting. well, I must be one-lucky-dog then! I mis-matched an 8GB and
>> a 4GB with no ill effects.
>>
>> On Wed, Sep 14, 2022 at 6:01 PM Michael Butash via PLUG-discuss <
>> plug-discuss at lists.phxlinux.org> wrote:
>>
>>> I would highly recommend NOT mixing and matching sticks of ram, this has
>>> never ended well for me, particularly since most everything is dual-channel
>>> configs these days and really need to be paired exactly per bank.  If you
>>> do/must, match them up as close as possible in terms of speed, cas/ras
>>> latency, etc, or only use the exact same ram down to the model number.
>>>
>>> I've long ago stopped mixing and matching sticks of ram for weird pc
>>> crashes, I always put them in as a set now.  Matched sets by batch are
>>> best, or if needing a bunch of sticks for a server, buying a batch of same
>>> sticks used of ebay out of the same server has been good to me too, just
>>> make sure to run a memtest on them first to make sure they're good if
>>> used.
>>>
>>> Likewise test if using off brand random sticks, they're probably cheap
>>> for a reason ie. 2nd rate parts.  These days I only use samsung memory.
>>>
>>> -mb
>>>
>>>
>>>
>>> On Wed, Sep 14, 2022 at 2:34 PM Michael via PLUG-discuss <
>>> plug-discuss at lists.phxlinux.org> wrote:
>>>
>>>> Thanks for the tip!
>>>>
>>>> On Wed, Sep 14, 2022 at 4:34 PM Stephen Partington <
>>>> cryptworks at gmail.com> wrote:
>>>>
>>>>> if your motherboard/bios is well designed yes, they will run at the
>>>>> slower speed. you can even encourage this compatibility by installing the
>>>>> slower module in the first memory channel.
>>>>>
>>>>> On Wed, Sep 14, 2022 at 4:32 PM Michael <bmike1 at gmail.com> wrote:
>>>>>
>>>>>> Thanks! Does that mean both will be the slower speed?
>>>>>>
>>>>>> On Wed, Sep 14, 2022 at 3:31 PM Stephen Partington <
>>>>>> cryptworks at gmail.com> wrote:
>>>>>>
>>>>>>> technically yes. but one is faster than the other.
>>>>>>>
>>>>>>> On Wed, Sep 14, 2022 at 1:57 PM Michael via PLUG-discuss <
>>>>>>> plug-discuss at lists.phxlinux.org> wrote:
>>>>>>>
>>>>>>>> https://www.ebay.com/itm/324592214962
>>>>>>>>
>>>>>>>> https://www.ebay.com/itm/324588786229?mkevt=1&mkpid=0&emsid=e11050.m43.l1123&mkcid=26&ch=osgood&euid=928c7022651c489a853c83def083a70e&bu=44153278520&osub=-1%7E1&crd=20220913222229&segname=11050
>>>>>>>> If they are, how is the more expensive one better?
>>>>>>>> --
>>>>>>>> :-)~MIKE~(-:
>>>>>>>>
>>>>>>> ---------------------------------------------------
>>>>>>>> PLUG-discuss mailing list: PLUG-discuss at lists.phxlinux.org
>>>>>>>> To subscribe, unsubscribe, or to change your mail settings:
>>>>>>>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> A mouse trap, placed on top of your alarm clock, will prevent you
>>>>>>> from rolling over and going back to sleep after you hit the snooze button.
>>>>>>>
>>>>>>> Stephen
>>>>>>>
>>>>>>> --
>>>>>> :-)~MIKE~(-:
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> A mouse trap, placed on top of your alarm clock, will prevent you from
>>>>> rolling over and going back to sleep after you hit the snooze button.
>>>>>
>>>>> Stephen
>>>>>
>>>>>
>>>>
>>>> --
>>>> :-)~MIKE~(-:
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>>>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>>
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>>
>>
>>
>> --
>> :-)~MIKE~(-:
>> ---------------------------------------------------
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>> To subscribe, unsubscribe, or to change your mail settings:
>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
>
>
>
> --
> A mouse trap, placed on top of your alarm clock, will prevent you from
> rolling over and going back to sleep after you hit the snooze button.
>
> Stephen
>
> ---------------------------------------------------
> PLUG-discuss mailing list: PLUG-discuss at lists.phxlinux.org
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