Should probably also include the note that the bios version needs to be 2.1.2 and above as that is the bios version that includes support for 64gb LRDIMM (at least in the release docs) www.dell.com/support/home/en-us/drivers/driversdetails?driverid=cfp0g&oscode=ws8r2&productcode=poweredge-r720
and out of curiosity, have you guys actually tried filling up the server fully with 64gb lrdimm to reach 1.5TB ram? Because on Intel and SuperMicro's documentation, E5 2600 v2 only supports up to 8 rank per memory channel, there's 3 dimm per memory channel, and 64gb DDR3 LRDIMM is actually octal rank (x8, presented to the system as quad ranked (x4) due to the buffering). So...... based on that, each memory channel would only support up to 2 x 64gb LRDIMM per slot, which would make it 8 channels x 2 DIMM slots per channel (1 wasted due to the rank limitation) x 64gb = 1TB RAM. (page 17 - • Up to 8 ranks supported per memory channel: 1, 2 or 4 ranks per DIMM ) www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v2-datasheet-vol-1.pdf www.supermicro.com/support/resources/memory/X9_DP_memory_config_socket_R.pdf
Update: Supermicro is giving a different info so..... hmm...... would appreciate if you guys can test maxing it out to verify which is true :) "When using an Octal LRDIMM, DIMM3 would not be populated since filling DIMM1/DIMM2 would reach the logical rank limit of the processor." www.supermicro.com/support/resources/memory/X9_DP_memory_config_socket_R.pdf Original Comment: okay, seems like I got my answer. so LRDIMM are treated as dual rank (2r), I always read article that it is half the rank so I thought the 8r lrdimm would be treated as 4r dimm. "LR DIMMs are labeled as quad- and octal-rank DIMMs. There are four and eight ranks of DRAM on the DIMM, but the LR DIMM buffer creates an abstraction that allows the DIMM to appear as a logical dual-rank DIMM to the system." techlibrary.hpe.com/docs/iss/DL380_Gen9/setup_install/GUID-85811F5E-E204-474C-B670-2F4C7F90C7AA.html
Lrdimm are dual ranked if i am not wrong, because (in other servers too) ecc is only 16 dimms and it uses rankrule because 2 of them are buffering (added because ecc) with ecc ubfuffered there isn any buffer and (if im not wrong) its dual rank maximum per dimm as well as lrdimm wich is not ecc
Can you please tell - I actually have 4 *32gb 1866MHZ Ram already and I have a spare Server with 10 of these 32gb sticks should I be fine pulling 2 sticks from my second Server ? None of both are commissioned yet
I bought noday an r720 for a homelab I'm designing for hosting services like kubernates, routering, firewall, dns and vps anch some other services with a pair of 2660 v2 10 core and 64 8x8 gb 1333 (not the best ram but we dont care) and 2 disks 600 gb sff in raid 1 to contain the vms operating system Also ordered from 🇮🇹
Thanks for video. Just the thing I was looking for
Appreciate the positive feedback.
Please note. You can use 64GB DDR3 LRDIMMs with the R720. Thank you!
Should probably also include the note that the bios version needs to be 2.1.2 and above as that is the bios version that includes support for 64gb LRDIMM (at least in the release docs)
www.dell.com/support/home/en-us/drivers/driversdetails?driverid=cfp0g&oscode=ws8r2&productcode=poweredge-r720
@@wcypierrenet thanks for adding! Take care.
and out of curiosity, have you guys actually tried filling up the server fully with 64gb lrdimm to reach 1.5TB ram?
Because on Intel and SuperMicro's documentation, E5 2600 v2 only supports up to 8 rank per memory channel, there's 3 dimm per memory channel, and 64gb DDR3 LRDIMM is actually octal rank (x8, presented to the system as quad ranked (x4) due to the buffering).
So...... based on that, each memory channel would only support up to 2 x 64gb LRDIMM per slot, which would make it 8 channels x 2 DIMM slots per channel (1 wasted due to the rank limitation) x 64gb = 1TB RAM.
(page 17 - • Up to 8 ranks supported per memory channel: 1, 2 or 4 ranks per DIMM
)
www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v2-datasheet-vol-1.pdf
www.supermicro.com/support/resources/memory/X9_DP_memory_config_socket_R.pdf
Update: Supermicro is giving a different info so..... hmm...... would appreciate if you guys can test maxing it out to verify which is true :)
"When using an Octal LRDIMM, DIMM3 would not be
populated since filling DIMM1/DIMM2 would reach the logical rank limit of the processor."
www.supermicro.com/support/resources/memory/X9_DP_memory_config_socket_R.pdf
Original Comment:
okay, seems like I got my answer. so LRDIMM are treated as dual rank (2r), I always read article that it is half the rank so I thought the 8r lrdimm would be treated as 4r dimm.
"LR DIMMs are labeled as quad- and octal-rank DIMMs. There are four and eight ranks of DRAM on the DIMM, but the LR DIMM buffer creates an abstraction that allows the DIMM to appear as a logical dual-rank DIMM to the system."
techlibrary.hpe.com/docs/iss/DL380_Gen9/setup_install/GUID-85811F5E-E204-474C-B670-2F4C7F90C7AA.html
Lrdimm are dual ranked if i am not wrong, because (in other servers too) ecc is only 16 dimms and it uses rankrule because 2 of them are buffering (added because ecc) with ecc ubfuffered there isn any buffer and (if im not wrong) its dual rank maximum per dimm as well as lrdimm wich is not ecc
Nice video, thanks for the upload!
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Can I use PC3 with PC3L together?
Great question. Yes will work together.
Can you please tell - I actually have 4 *32gb 1866MHZ Ram already and I have a spare Server with 10 of these 32gb sticks should I be fine pulling 2 sticks from my second Server ? None of both are commissioned yet
Yes. 6 in server 1 and 8 in server 2 will work great.
I bought noday an r720 for a homelab I'm designing for hosting services like kubernates, routering, firewall, dns and vps anch some other services with a pair of 2660 v2 10 core and 64 8x8 gb 1333 (not the best ram but we dont care) and 2 disks 600 gb sff in raid 1 to contain the vms operating system
Also ordered from 🇮🇹
I bought today*
Nice! Congrats. Have fun with it!
It's just ddr3 Isn't it
Different types of DDR3 my friend.
@@cloudninjas yes it's ecc won't it literally fit in a desktop and even work if you have an ecc compatible cpu
Pc wall.. day sini 😅🤔🙄