Tag: memory

Upgrade DS1812+ RAM to 6GB

Upgrade DS1812+ RAM to 6GB

After I found there is an internal memory also can be replaced, I decided to try replace it with higher capacity memory.


I got one 4GB memory and one 1GB default memory.


Because the default is not easy to reach and I'm not sure whether the slot is suitable for 4GB RAMs or not, so I swap two RAMs and boot.

Result: It works. Not the default memory slot has 4GB RAM in it.

Upgrade to 6GB

Then I replace the 1GB memory to 2GB as below.

root@ds1812:~# free
              total        used        free      shared  buff/cache   available
Mem:        6106616      576752      593516       16440     4936348     5115404
Swap:       2097084      166520     1930564
root@ds1812:~# cat /proc/meminfo
MemTotal:        6106616 kB
MemFree:          434420 kB
Buffers:            5968 kB
Cached:          4793912 kB
SwapCached:        18104 kB
Active:          1456104 kB
Inactive:        3398440 kB
Active(anon):      30672 kB
Inactive(anon):    40608 kB
Active(file):    1425432 kB
Inactive(file):  3357832 kB
Unevictable:        5560 kB
Mlocked:            5560 kB
SwapTotal:       2097084 kB
SwapFree:        1930572 kB
Dirty:             48688 kB
Writeback:             0 kB
AnonPages:         48644 kB
Mapped:            42632 kB
Shmem:             16448 kB
Slab:             289948 kB
SReclaimable:     113820 kB
SUnreclaim:       176128 kB
KernelStack:        9360 kB
PageTables:        44156 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     5150392 kB
Committed_AS:    1645472 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      465564 kB
VmallocChunk:   34359255664 kB
DirectMap4k:       16876 kB
DirectMap2M:     6262784 kB


Memory test hung after upgrade to 64GB RAM (Follow-up)

Memory test hung after upgrade to 64GB RAM (Follow-up)

Note: This is follow up action of Memory test hung after upgrade to 64GB RAM

This machine was installed TrueNAS, but reboot quite often, about few times a week. After that, I changed it to Proxmox, then one of the active VM kept hanging.

I decided to re-look into the memory test issue.

32GB testing

If only install 32GB memory, the test was OK at beginning. But after full day of testing, start to have 1 failure in one pass, not many but not acceptable.

64GB testing

If install 48GB or 64GB memory, the test caused system hanging in black screen.

Reduce memory speed

After reduce the memory speed to 1066 for 64GB memory, looks OK in Pass 1, but Pass 2 got issue again.

Getting worse

After full day of testing, the test result was getting worse. Previously hung at 80%+, then hung at 40%+. Then looks like problem caused by other factors, such as temperature, etc.

Then I noticed that the power supply is very hot and no noise. Then I think the issue could be the system was not getting enough power.

Change power supply

After take out the power supply, found that power supply fan was not turning. Normally, this issue can not be detected, because the fan towards the bottom of casing.

I got one new power supply, after installed new power supply, the system become colder.

Memory test

After changed the power supply, the memory passed when setting at speed of 1333, which is also the speed detected by motherboard. Even the motherboard auto overclocked CPU speed to 4000+ (CPU speed should be 3600), no error too.

Speed of the old set of RAMs

The new set of RAMs can pass testing at 1600 speed, but the old set got error less than 1 minute.

Although the spec of the old and new RAMs are all the same, brand, speed, etc, but the system detected the new RAMs are 1600, but old set are 1333, no matter in which memory slot. I'm not sure whether the lower speed is caused by aging or because cheated by seller.

Speed of testing among 1600, 1333, and 1066

During the testing, I noticed that the testing speeds are quite different among 1600, 1333 and 1066 if they are under same CPU speed.



Memory test hung after upgrade to 64GB RAM

Memory test hung after upgrade to 64GB RAM

Update: The problem was fixed as stated in Memory test hung after upgrade to 64GB RAM (Follow-up)

Took many hours to troubleshoot RAM test hanging issue.

Testing software


The test was hung at 86% during pass 1.


The bootable USB created was not bootable.

Ubuntu Live CD

The testing was hung just started.

Posible issue

Hardware issue

Should not be RAM issue, tested them by separating them into two sets with 32GB each, using MemTest86, both sets can pass.

Maybe slot issue

The RAM must be in slots in correct order, otherwise, the RAM can not be detected. In fact, this mother board is quite sensitive to the RAM position.


Maybe RAM hot

The RAMs could be too hot, the newly added RAMs make the gabs between RAMs are too small, the fans are also not strong enough, this could cause high temperature. I tried to adjust the fan speed by using the controls on casing, but not effective.

But RAM should be able to take high temperature, and the type of RAM I bought has cooling case.

Software issue

Maybe conflict with VGA

The max RAM size that MemTest86 can support, is 64GB, which means it could have bug too. On the other hand, the hunging shows nothing on the screen, black screen, but keyboard light was still responsive, and the VGA light on mother board was turned on. Maybe the software wrote the area that video card used caused such issue.


Although the testing was hung, I decided still use them.

In order to use them fully in TrueNAS, I adjusted the zfs_arc_max to 60GB, and run two VMs, one Windows at 4GB, one ubuntu at 6GB, till the memory free less than 4GB.


The TrueNAS looks working fine, although restarted once, log didn't show the cause related to memory, and there was no memory issue in dmesg monitoring screen.

Reuse ASUS P9X79 DELUXE motherboard

Reuse ASUS P9X79 DELUXE motherboard




Following CPUs are supported

Core i7-3820 (3.6G,L3:10M,4C,HT,rev.M0)
Core i7-3820 (3.6G,L3:10M,4C,HT,rev.M1)
Core i7-3930K (3.2G,L3:12M,6C,HT,rev.C1)
Core i7-3930K (3.2G,L3:12M,6C,HT,rev.C2)
Core i7-3960X Extreme Edition(3.3G,L3:15M,6C,HT,rev.C1)
Core i7-3960X Extreme Edition(3.3G,L3:15M,6C,HT,rev.C2)
Core i7-3970X Extreme Edition(3.5G,L3:15M,6C,HT,150W,rev.C2)
Core i7-4820K (3.7GHz, L3:10M, 4C, HT, 130W, rev.S1)
Core i7-4930K (3.4GHz, L3:12M, 6C, HT, 130W, rev.S1)
Core i7-4960X (3.6G, L3:15M, 6C, HT, 130W, rev.S1)

Following CPUs are partially supported as description below

Intel Xeon Processor Family is designed for servers. Some features may not support when installed on X79 series chipsets. For more details, refer to ASUS support site at http://support.asus.com.

Intel Xeon E5-1620 v2 (3.7G,130W,L3:10M,4C,HT)
Intel Xeon E5-1650 v2 (3.5G,130W,L3:12M,6C,HT)
Intel Xeon E5-1660 v2 (3.7G,130W,L3:15M,6C,HT)
Intel Xeon E5-2603 v2 (1.8G,80W,L3:10M,4C,HT)
Intel Xeon E5-2609 v2 (2.5G,80W,L3:10M,4C,HT)
Intel Xeon E5-2620 v2 (2.1G,80W,L3:15M,6C,HT)
Intel Xeon E5-2630 v2 (2.6G,80W,L3:15M,6C,HT)
Intel Xeon E5-2630L v2 (2.4G,60W,L3:15M,6C,HT)
Intel Xeon E5-2637 v2 (3.5G,130W,L3:15M,4C,HT)
Intel Xeon E5-2640 v2 (2.0G,95W,L3:20M,8C,HT)
Intel Xeon E5-2643 v2 (3.5G,130W,L3:25M,6C,HT)
Intel Xeon E5-2650 v2 (2.6G,95W,L3:20M,8C,HT)
Intel Xeon E5-2650L v2 (1.7G,70W,L3:25M,10C,HT)
Intel Xeon E5-2660 v2 (2.2G,95W,L3:25M,10C,HT)
Intel Xeon E5-2667 v2 (3.3G,130W,L3:25M,8C,HT)
Intel Xeon E5-2670 v2 (2.5G,115W,L3:25M,10C,HT)
Intel Xeon E5-2680 v2 (2.8G,115W,L3:25M,10C,HT)
Intel Xeon E5-2687W v2 (3.4G,150W,L3:20M,8C,HT)
Intel Xeon E5-2690 v2 (3.0G,130W,L3:25M,10C,HT)
Intel Xeon E5-2695 v2 (2.4G,115W,L3:30M,12C,HT)
Intel Xeon E5-2697 v2 (2.7G,130W,L3:30M,12C,HT)

Intel Info

Compatibility for FCLGA2011, FCLGA2011-v3, and FCLGA2066 Sockets (Intel® Core™ X-series Processors)

FCLGA2011 socket compatibility

These processors are compatible with the FCLGA2011 socket. They are backward and forward compatible with the motherboard supporting FCLGA2011 socket. We recommend you always download the latest BIOS from the motherboard vendor when installing a new processor. For any issues, please check with your board manufacturer to see if your board is compatible with the processor you intend to use.

Intel® Core™ i7-4960X Processor Extreme Edition
Intel® Core™ i7-4930K / i7-4820K Processors
Intel® Core™ i7-3960X / i7-3970X Processor Extreme Edition
Intel® Core™ i7-3930K / i7-3820 Processors


CORSAIR Vengeance 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ32GX3M4X1600C10

Final result

CPU Info

lscpu output


Memory and Performance



Memory upgrade for Synology DS2419+

Memory upgrade for Synology DS2419+

As mentioned in memorystock.com, Synology DS2419+ can use Dual Rank Memory (16GB DDR4 PC4-19200 2400MHz SODIMM NON-ECC Unbuffered 260pin 1.2V CL15 Dual Rank MemoryStock Part# 977ms-977). But my last upgrade failed using Dual Rank memory, only Single Rank works.

Some people mentioned that Synology NAS can use 32GB RAM, but some people said it will cause data corruption if exceed max supported memory. I just upgraded my DS1812+ more than officially supported memory size, hope it will be ok.


Synology 64GB DDR4 Unofficial Memory Upgrade Test for DiskStation NAS
Synology NAS Unofficial Memory Upgrade Guide
Memory Upgrade for Synology DiskStation DS2419+ Computer

Upgrade Synology DS1812+ Memory

Upgrade Synology DS1812+ Memory

As the Synology DS1812+ NAS officially only supports 3GB RAM, I used 3GB RAM NAS for many years.

Recently, I got one 1Rx8 4GB DDR3 RAM, wanted to try to see whether DS1812+ can use it.

After installed, luckily it is working. Plus 1GB on board memory, it has about 5GB memory now.

root@ds1812:~# free
              total        used        free      shared  buff/cache   available
Mem:        5072432      901144      323456       15908     3847832     3761546
Swap:       5140404      460920     4679484
root@ds1812:~# cat /proc/meminfo 
MemTotal:        5072432 kB
MemFree:          890332 kB
Buffers:            6104 kB
Cached:          3018256 kB
SwapCached:        29084 kB
Active:           662768 kB
Inactive:        2548468 kB
Active(anon):      94080 kB
Inactive(anon):   108664 kB
Active(file):     568688 kB
Inactive(file):  2439804 kB
Unevictable:        5804 kB
Mlocked:            5804 kB
SwapTotal:       5140404 kB
SwapFree:        4675032 kB
Dirty:             18444 kB
Writeback:          3860 kB
AnonPages:        188544 kB
Mapped:            76504 kB
Shmem:             15376 kB
Slab:             261456 kB
SReclaimable:      63788 kB
SUnreclaim:       197668 kB
KernelStack:       14400 kB
PageTables:        69604 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     7676620 kB
Committed_AS:    4152632 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      478460 kB
VmallocChunk:   34359221580 kB
DirectMap4k:       16876 kB
DirectMap2M:     5214208 kB