03-10-2014 10:09 PM
cshen24 inspired me to to a bit more tinkering and I got the following results:
Note I'm not 100% on slot numbering
Interesting that a 1gb stick will fail in one slot but not the other - but as I haven't run any stress tests I can't confirm this is stable, so I guess it is exhibiting the same problems as the 2x8gb.
03-12-2014 06:17 PM - last edited on 03-13-2014 04:49 AM by andyP
Hopefully final update:
I downgraded to the 2.08 BIOS and threw in 4x32gb of G.Skill. The system posted after a while, but either crashed on boot or bluescreened shortly after windows started.
I booted into memtestx86 and got the following errors:
After this in an attempt to isolate the bad SODIMM (or potentially bad slot) I tried booting with individual sodimms. The problem was with a single SODIMM inside the system would only run the memory at 1600 for some reason (is this an artifact of non-paired ram? or the bug that the 2.09 bios fixes?. Memtest detected no problems but I thought that this might be because of the reduced speed.
I tried booting with 2 sodimms at a time, but the system would not even post. This was over a variety of different combinations of sodimms in a variety of different slots.
Eventually I gave up and threw all 4 sticks back in and ran memtest again. It went for about 2 hours without any problems. I booted into windows and have been running at 1866 since them with no problems. I intend to let it run overnight
I'm utterly baffled. Based on results I have no idea if it was the BIOS, faulty memory (fixed by burn-in effect? which I thought was a urban myth) or badly seated ram or dodgy contacts.
I'm tempted to upgrade my BIOS back to 2.09 but I'm afraid it will render my system unbootable again, so will leave it for now
Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules
03-12-2014 08:07 PM
Haha, that kind of feels like my experience. Once things worked, I was like "these memory chips are going to be seated here permanently". Glad to hear that everything worked out for you!
03-12-2014 09:51 PM - edited 03-12-2014 10:41 PM
Indeed, if you think it is a contact failure, using a qTip with a small (and I mean small amount) of Stabilant 22 to both contact sides helps in two ways:
1] Cleans the contacts of any corrosion from arcing.
2] Leaves a residue of polyglycol copolymer on the contacts, creating a barrier to oxigen that may over time corrode and add resistance to the pathway.
Stabilant 22 due to it's nature, also acts like a lubricant when you are adding/removing the SODIMM so often.
Do due diligence on your part. It works for me, having used the product since the old days of memory chip banks. The literature claims is switches to a conductive state, but I do not believe this, it is less glorious, the polymer just acts as a barrier to oxigen as I mentioned before. (I have NOT used DeoxIT, or Tweek on SODIMM, so I have no experience with these two chemicals).
03-15-2014 05:24 PM
I just got around to tesitng different configurations. I did memory tests with 1 stick 2 and 4 of the Gskill Ripjaw 1866 CL10 - all failed Lenovo memory quick tests. My only symptom was occasional BSOD.
I ended up putting the one stock Lenovo 8GB stick back in (1600MHz CL11) with 3 Gskill (1866MHz CL10) and it passed the memory tests - but for some reason is only running 1366mHz CL9. No BSOD so far.
I will be doing a lot of travellling soon - so I cannot deal with any sort of reliability problems so it will stay in this configuration for a while if it presents no problems.
I'm hoping maybe a future BIOS update will make this memory compatible and I will be able to run all 4 sticks at 1866 CL10 (as it states it should be comptible with 4th generation Haswell processors)...otherwise - I guess I will have ot look for 32GB of 1600MHz CL9.
03-19-2014 07:53 AM - edited 03-19-2014 07:54 AM
I've experienced the same problems with 32GB of Crucial Ballistix Sport DDR3L-1866 CL10 (PC3-14900) and can report that flashing the BIOS from v2.05 to v2.09 did not help. I exchanged the four SODIMMS for Crucial Ballistix Sport DDR3L-1600 CL9 (PC3-12800) and these pass repeated, extended memory tests in Lenovo diag's and pass Win-8 mem' test. While the Crucial.com memory finder did "guarantee" compatibility of DDR3L-1866 memory for W540 (quad-core) my experience has shown that it is not compatible.
Just to mirror everyone's experiences - 1866Mhz RAM is a no go.
16GB of Crucial Ballistix Sport DDR3L-1866 CL10 - no post with an endless reboot cycle.
16GB of Crucial Ballistix Sport DDR3L-1600 CL9 - quick post, no issues.
Since 1866Mhz RAM isn't even officially supported by Intel, I would stay far, far away (as of BIOS 2.09, at least).
03-22-2014 08:52 AM
Thanks for posting your experience. I was beginning to be very disappointed after installing 32gb of Crucial RAM into my W540. I waited 10-20 seconds then powered off thinking the ram was bad. Then I started putting it in stick-by-stick and it worked. Finally, I read your post and had hope. I put all 32gb back in and powered up. I waited about 40 seconds then the Lenovo logo appeared.
Your post saved me from disappointment. Thanks!
03-22-2014 05:15 PM