| Walt Mankowski via plug on 29 Aug 2020 16:15:27 -0700 |
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| Re: [PLUG] Can I use these 2 sets of DIMMs together? |
I found some pages that said basically the same thing, but without all the extra technical detail. Thanks! Walt On Sat, Aug 29, 2020 at 05:43:31PM -0400, Rich Mingin (PLUG) via plug wrote: > Mixing DDR3 and DDR3L isn't generally a problem. The original JEDEC spec > for DDR3 mandated a default 1.5V for signalling, with +/-10% being > acceptable and required, as with most voltage specs in a PC. DDR3L allows > signalling explicitly at 1.5V or 1.35V. This enables machines equipped with > only DDR3L to default to 1.35V signalling and save a few watts. In a mixed > case, your DDR3L is getting more voltage than it wants, but it's still in > spec, won't cause problems. > > DDR4 has a similar thing, the baseline spec mandates 1.2V signalling and > 1.35V (and even 1.5V in extreme cases) is available via XMP profiles. > Eventually I expect to see DDR4L modules at 1.0V or 1.1V signalling. This > generally happens later in the lifecycle of a standard, as yields improve. > > On Sat, Aug 29, 2020 at 5:32 PM Keith C. Perry via plug < > plug@lists.phillylinux.org> wrote: > > > Glad it worked out Walt. 'Definitely didn't sound like it would be an > > issue after your second email. > > > > Also, AMD for the win :) > > > > On August 29, 2020 4:02:55 PM EDT, Walt Mankowski via plug < > > plug@lists.phillylinux.org> wrote: > >> > >> Well, I decided to give it a try and it seems to have worked just > >> fine. > >> > >> Walt > >> > >> On Sat, Aug 29, 2020 at 03:16:24PM -0400, Walt Mankowski via plug wrote: > >> > >>> Thanks Keith, > >>> > >>> I think I must not have been clear. My box currently has 2 x 8 GB DIMMs and 2 empty slots. I bought 4 x 8 GB DIMMs. If I can use them together, then the box will have 4 x 8 GB DIMMS (2 old DDR3L and 2 new DDR3). I'll return the other 2 x GB DIMMs and get back about $60. > >>> > >>> Walt > >>> > >>> On Sat, Aug 29, 2020, at 3:08 PM, Keith C. Perry wrote: > >>> > >>>> I just recently retested my thoughts on this for a workstation I have to George, so for what it is worth... > >>>> > >>>> The best case scenario is of course to use the same spec memory in all slots- (trivial solution I know but said for the record). > >>>> > >>>> Barring that, the next more important thing is to use the same pairs and then the same speed memory. > >>>> > >>>> I would check to make sure your motherboard can use a 2 x 8Gb and a 2 x 16Gb kit but would think it would work. > >>>> > >>>> Doing a memory test before you install the kit and after you install the kit will tell you if you are degrading performance with the new kit. > >>>> > >>>> > >>>> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ > >>>> Keith C. Perry, MS E.E. > >>>> Managing Member, DAO Technologies LLC > >>>> (O) +1.215.525.4165 x2033 > >>>> (M) +1.215.432.5167 > >>>> www.daotechnologies.com > >>>> > >>>> > >>>> *From: *"Walt Mankowski via plug" <plug@lists.phillylinux.org> > >>>> *To: *plug@lists.phillylinux.org > >>>> *Sent: *Saturday, August 29, 2020 2:47:58 PM > >>>> *Subject: *[PLUG] Can I use these 2 sets of DIMMs together? > >>>> > >>>> Hi, > >>>> > >>>> I went to Microcenter today and bought some RAM, with the intention of upgrading my Linux box from 16 to 32 GB. I thought I had 4 4-GB DIMMs so I bought 4 8-GB DIMMs. But when I got home and opened up my box, I discovered that what I actually had was 2 8-GB DIMMs and 2 empty slots. My question is whether I can use 2 of the DIMMs I just bought and return the other two. > >>>> > >>>> Here's what I currently have: https://www.crucial.com/memory/ddr3/ct2k102464bd160b/ct8966767 > >>>> > >>>> Here's what I just bought (2 packages): https://www.microcenter.com/product/509757/neo-forza-encke-16gb-(2-x-8gb)-ddr3-1600-pc3-12800-cl11-dual-channel-desktop-memory-kit-nmud380d8116cc2---gold# > >>>> > >>>> The specs look identical as far as I can tell. I'm a bit worried about the heat sink on the new DIMMs but they look like they should fit. > >>>> > >>>> Thanks. > >>>> > >>>> Walt > >>>> ------------------------------ > >>>> Philadelphia Linux Users Group -- http://www.phillylinux.org > >>>> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce > >>>> General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug > >>>> > >>> > >> ------------------------------ > >>> Philadelphia Linux Users Group -- http://www.phillylinux.org > >>> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce > >>> General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug > >>> > >> > >> > > -- > > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > ___________________________________________________________________________ > > Philadelphia Linux Users Group -- > > http://www.phillylinux.org > > Announcements - > > http://lists.phillylinux.org/mailman/listinfo/plug-announce > > General Discussion -- > > http://lists.phillylinux.org/mailman/listinfo/plug > > > ___________________________________________________________________________ > Philadelphia Linux Users Group -- http://www.phillylinux.org > Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce > General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
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