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Samsung 16GBit A-die / M-die (32GB unbuffered DIMM, NOT double-height DIMM)

 
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post #1 of 3 (permalink) Old 06-17-2019, 04:17 PM - Thread Starter
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Samsung 16GBit A-die / M-die (32GB unbuffered DIMM, NOT double-height DIMM)

There are now 32GB DIMMs available that use 16GBit Samsung IC's. I'm not talking about those weird double-stacked DIMM's that only work in 2 motherboards (ASUS ROG MAXIMUS XI APEX to name one). They're available for as low as $145.99 per DIMM with a JEDEC rating of 2666MHz CAS19.

https://www.superbiiz.com/detail.php?name=D432G266S1
https://www.avadirect.com/32GB-M378A...oduct/12763278

Has anyone tried these yet?

Intel Core i9-9900k (Silicon Lottery 5.1GHz @ 5.3GHz 1.36 VCore)
ASUS ROG MAXIMUS XI APEX
G.SKILL F4-4000C19D-32GTZSW (2x16GiB 4000MHz 19-19-19-39 2T, tuned to 4133MHz 14-17-17-31 2T)
EVGA NVIDIA GeForce GTX 1080 Ti FTW3
Seasonic PRIME 1300W 80+ Platinum

Last edited by ssateneth; 06-25-2019 at 07:58 PM.
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post #2 of 3 (permalink) Old 06-18-2019, 04:47 PM
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These are Samsung 16GBit M-Die and while you can overclock them, you won't get anywhere near the performance of your F4-4000C19D-32GTZSW @ DDR4-4133 14-17-17 out of them.

Team HARDWARELUXX | B-Die Memory List @ Hardwareluxx
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post #3 of 3 (permalink) Old 06-25-2019, 07:39 PM - Thread Starter
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Extremely preliminary results shows these can run 3600MHz. But they are also not binned like what your usual RAM assembler would (gskill, corsair, etc) so your results could vary wildly. I got a pair and so did Buildzoid. I'm running them on an Asrock Z370 Taichi, which has a daisy chain arrangement and not quite the best physical arrangement. I also have a ASUS Z390 ROG MAXIMUS XI APEX but I'm reluctant to shove these DIMMs in there since I use it for day to day tasks (I know, seems like a waste, right?)

M-Die seems to respond well to voltage. 3600 CAS14 does not POST @ 1.5 volts. It does POST @ 1.65 volts with occasional errors in memtest. It runs fine @ 1.7 volts, but then I run into another wall. These IC's seem to be temperature sensitive. After about 5 minutes, many frequent memory errors. These DIMMs do not have an integrated temperature sensor, so I just used my finger. Yup, these puppies get hot with no heatspreader @ 1.7 volts. Very hot to the touch, but not enough to burn finger. My 16GB x 2 B-die also run 1.7 volts day to day, and will not exceed 45C. Will work on 3600 CAS15. 3700 does not seem to be stable (yet). Will see.

3600 CAS14 1.5V = no POST
3600 CAS14 1.65V = Runs memtest with occasional error (1 per minute)
3600 CAS14 1.7V = Runs memtest OK, but temperature limited (frequent errors after 5 minutes)

3600 CAS15 1.4V = no POST
3600 CAS15 1.45V = Almost passes POST sequence
3600 CAS15 1.475V = Runs memtest with frequent errors
3600 CAS15 1.5V = Runs memtest with occasional error
3600 CAS15 1.525V = No errors after 13 hours memtest

TRCD and TRP seem to need to be loose. Current running 22 on TRCP/TRP. Any lower throws errors.
TRFC also needs to be pretty high. Currently set to 560. Any lower throws infrequent errors. 65535 TREFI is OK.
Can set CAS Write Latency pretty low. Runs at 8 @ 3600MHz OK. Lower = no post.

Intel Core i9-9900k (Silicon Lottery 5.1GHz @ 5.3GHz 1.36 VCore)
ASUS ROG MAXIMUS XI APEX
G.SKILL F4-4000C19D-32GTZSW (2x16GiB 4000MHz 19-19-19-39 2T, tuned to 4133MHz 14-17-17-31 2T)
EVGA NVIDIA GeForce GTX 1080 Ti FTW3
Seasonic PRIME 1300W 80+ Platinum

Last edited by ssateneth; 06-26-2019 at 03:56 PM.
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