Question 64GB on AM4 Platform?

[extide]

I wonder how well they tolerate 1.4-1.45v ... hrmm

EDIT: @thigobr you are talking about these, right: https://www.avadirect.com/32GB-M378A4G43MB1-CTD-DDR4-2666MHz-CL19-DIMM-Memory/Product/12763278

 

[thigobr]

@extide exactly these modules from AVADirect: M378A4G43MB1-CTD

I think they handle voltage well because they are still build on an older process. I will test with more volts on the next few days...

 

[extide]

Yeah I am not afraid of getting a bit rough with the voltage and strapping a set of these babies on if I have to

 

[lopri]

@thigobr Thank you for the update. Those are indeed very intriguing sticks! Though I've had a 64 GB system but now I am about to downgrade to 32 GB as well. It is not easy to make use of the whole 64 GB.

 

[DrMrLordX]

@thigobr

Actually those DIMMs are M-die. I think those are from the newer 10y process? Should have the same basic voltage tolerance as 10x though? Not really sure. Anyway rumour has it that DDR4-3600 is attainable with those, and 3333 easily. That's a lot of speed from dual-rank 32GB DIMMs!

 

[Atif]

@thigobr it seems going Threadripper/X399 might have been the right choice for now. Hopefully things improve with motherboard/AGESA updates, but if the hope is to clock anywhere near/above 3200 with 64GB of RAM, this might be the platform for now

 

[extide]

The 32GB Samsung UDIMMs keep going up on AVADirect.. but

There are now Corsair sticks @ Newegg: https://www.newegg.com/p/pl?N=100007611 601190328 601275376&Order=PRICE

 

[Fanatical Meat]

The 32GB Samsung UDIMMs keep going up on AVADirect.. but

There are now Corsair sticks @ Newegg: https://www.newegg.com/p/pl?N=100007611 601190328 601275376&Order=PRICE

AT Post about them here:

https://www.anandtech.com/show/1465...-lpx-ddr4-dimms-64-gb-128-gb-dualchannel-kits

 

[.vodka]

I'm running 64GB (4x16GB dual rank) of these awesome Micron rev. E based modules (Crucial Ballistix LT/AT 3000C15-3200C16 with part number that includes the string AES), with a 1700 + C6H @ 3400MHz at the following timings:

Although the C6H being a T-topology based board helps in this scenario (4 populated slots), my 1700 can't do anything higher than 1700MHz fabric / 3400MHz memory speed while remaining stable. As you can see, Micron rev. E is ~95% of what Samsung B-die can do for daily usage at a fraction of the cost. Some people are pushing these to 3800MHz CAS14 ~1.5v on 3rd gen Ryzen's memory controller and beyond 4000MHz on Intel platforms. The DDR4 highest frequency record was recently set with these chips (!)

These ICs are as friendly as Samsung B-die for 1st and 2nd gen Ryzen's cranky memory controller and just as capable (the only limitations being looser tRCDRD and tRFC). Sweetspot 3600MHz CAS16 @ 1.4v is easily done for 3rd gen Ryzen. Being Ryzen friendly, out of the box XMP will run without issues on AM4, it's plug and play. Latest AGESA has really solved any issues that this configuration would've had in the past.

Of course, for sheer capacity these can't hold a candle to those new Samsung 32GB modules that could get you 128GB on AM4, but still. For what these cost, 64GB of high performance RAM has just become an affordable reality.

 

[thigobr]

I will get some Ryzen Timing Checker screenshots later but I have been playing with the memory and the best I can get at 1.35V is 3200MHz CL16-20-20-20-40 TRC 68 TRFC 500. I can boot CL15 but not stable. TRCDWR/TRCRRD and TRP don't go below 18T but might be stable at 19T, still testing...

The memory controller on my chip is bad frequency wise... I tried many times go past 3200MHz and it's never stable either with these or with Single Rank B-Die (tried 2x8GB Trident Z CL14 and 2x8GB Team Dark Pro CL14). I can boot up to 3466MHz but there is no VSOC/VDIMM/Vcore or timings combination that make it completely Prime95/y-cruncher stable.

@.vodka these are great results! I was thinking about grabbing a set of 2x16GB Ballistix LT 3200MHZ to play because based on the general results I am seeing they are the best price/performance/capacity compromise so far... But then I gave up, I will settle with these M-Die until DDR5!

 

[extide]

I will get some Ryzen Timing Checker screenshots later but I have been playing with the memory and the best I can get at 1.35V is 3200MHz CL16-20-20-20-40 TRC 68 TRFC 500. I can boot CL15 but not stable. TRCDWR/TRCRRD and TRP don't go below 18T but might be stable at 19T, still testing...

The memory controller on my chip is bad frequency wise... I tried many times go past 3200MHz and it's never stable either with these or with Single Rank B-Die (tried 2x8GB Trident Z CL14 and 2x8GB Team Dark Pro CL14). I can boot up to 3466MHz but there is no VSOC/VDIMM/Vcore or timings combination that make it completely Prime95/y-cruncher stable.

@.vodka these are great results! I was thinking about grabbing a set of 2x16GB Ballistix LT 3200MHZ to play because based on the general results I am seeing they are the best price/performance/capacity compromise so far... But then I gave up, I will settle with these M-Die until DDR5!

You are talking about eh Samsung M378A4G43MB1-CTD in this post, right?

 

[thigobr]

Yes, that's the one

 

[beginner99]

I'm running 64GB (4x16GB dual rank) of these awesome Micron rev. E based modules (Crucial Ballistix LT/AT 3000C15-3200C16 with part number that includes the string AES),

Did you get them as 4x16 kit or as a two 2x16 kits? I can only see the 4x kit with 3000mhz and not 3200mhz.

Is there an advantage in getting the 4x kit? Getting two 2x kits of the faster ram is actually cheaper.

 

[.vodka]

Did you get them as 4x16 kit or as a two 2x16 kits? I can only see the 4x kit with 3000mhz and not 3200mhz.

Is there an advantage in getting the 4x kit? Getting two 2x kits of the faster ram is actually cheaper.

I got them as 4 individual sticks as there were no 2x16GB or 4x16GB kits locally available where I live. Reading about these and the results people were getting, I decided to try my luck that way.

I think this makes them even more impressive, 4 unmatched dual rank sticks achieving these speeds and timings.

 

[beginner99]

II think this makes them even more impressive, 4 unmatched dual rank sticks achieving these speeds and timings.

True. I think I will get them as well. I can get a 2x16 kit. 3200 cl16. half price compared to b-die 3200 cl14...pretty much a no brainer.

 

[IEC]

@.vodka @beginner99

4x16GB (two 2x16GB DDR4-3200 CL16 Ballistix Sport kits) @ 3600 CL16:


Preliminary memtest pass:


I paid less than $240 USD for 64GB total.

Micron E-Die is great RAM and way more affordable than B-die (well, at least until more people start buying up E-die...)

 

[Fanatical Meat]

@.vodka @beginner99

4x16GB (two 2x16GB DDR4-3200 CL16 Ballistix Sport kits) @ 3600 CL16:
View attachment 8890

Preliminary memtest pass:
View attachment 8891

I paid less than $240 USD for 64GB total.

Micron E-Die is great RAM and way more affordable than B-die (well, at least until more people start buying up E-die...)

......aaaaaaannnnnddddd.........
The ddr3000 version is now (32GB two sticks) $180 and the 3200 is out of stock per Newegg.


Ryzen is so irritating with memory

 

[.vodka]

https://www.reddit.com/r/Amd/comments/ck0e1o

That poster didn't provide any further information apart from the screenshot. It's nice to see, nonetheless.

Probably these?

 

[extide]

Been thinking of buying those myself. Wonder how well they clock...

EDIT: Apparently these are the new Micron 16Gb chips, so not the Samsung M-Die like on those Samsung sticks. This is good, means there should be plenty of options for 32GB sticks soon.

 

[DrMrLordX]

Not bad, not bad at all. Kinda makes me wish I had that RAM instead of this high-speed stuff. Almost.

 

[thigobr]

After much fiddling with timings that's the best I could get using 1.350V VDIMM. I tried 1.450V but CL14 wasn't stable so I gave up... Maybe I can improve TRFC or *SCL timings I will keep trying... Enough performance for now!
Unfortunately the memory controller on this chip/IF is never stable above 3200MHz... It boots but even 3266MHz gives me stability troubles.