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Corsair CMW128GX4M8C3200C16


Arny006
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Dear All, dear Admins.

Here my Hard- & Soft-Ware:

- MSI X399 GAMING PRO CARBON AC (PCI-e 3)

- AMD Ryzen™ Threadripper™ 1900X

- Corsair CMK64GX4M8Z2933C16

- MSI Radeon RX Vega 64 8G

- Samsung NVMe 970 PRO 512 GB

- Corsair HX Series™ HX1200

- Linux Kubuntu 20.04 (this is 64 bit only)

 

I want replace my actual RAM with a faster and bigger one like in the title, in your specs is this RAM declared as compatible.

 

My Questions:

- Just setting XMP-2 in BIOS and the RAM run at "16-18-18-36", 1.35V and 3200MHz stable? No further adjustments?

- If then I increase the frequency to 3400MHz and the voltage to 1.400V, will the RAM run at "18-20-20-38" also stable or should I change other values and which one to run stable?

 

Please help me. Thanks in advance and best regards.

Edited by Arny006
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You aren't likely to be able to go beyond 2933mhz with that platform and CPU due to the integrated memory controller on those CPUs. Beyond that you should be referencing your motherboard's memory QVL list for the Threadripper 1000 CPUs.

 

But... in your specs is mentioned X399, does it mean for Threadripper 2000?

I learn (in the past) some RAM don't work even if in QVL and some RAM works better and with higher frequency even if not in QVL, this is the only reason to contact you.

Can you recommend me 128-GB kit for TR4-1 and TR4-2?

If I decide to give my actual build to my wife and take for me an TRX4 (xTR40) can you propose me a 8-RAM-kit (128=GB) for newer socket?

 

Thanks in advance and best regards.

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It is our recommendation to refer to the motherboard's memory QVL in order to have a kit that is capable of running at the speed and timings you wish to have. The integrated memory controller on the first generation ZEN CPUs were know for going faster as the memory went faster but they were not the best when it came to actually running the memory at those speeds.
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It is our recommendation to refer to the motherboard's memory QVL in order to have a kit that is capable of running at the speed and timings you wish to have. The integrated memory controller on the first generation ZEN CPUs were know for going faster as the memory went faster but they were not the best when it came to actually running the memory at those speeds.

The QVL haven't 128 kit at 3200 Mhz. I looked at a overclocking-video using CMD128GX4M83200C16 but with AMD tr4 2000WX.

The trick is: 1.2 Volts by SPD, XMP-1 2933, XMP-2 3200, timings 16-18-18-36, set XMP-1 (@ 2933 MHz) increase frequency to 3000 and finally (by more than 8 kernel/16 threads) increasing V (voltage) to 1.425.

The voltage increasing is needed only by 12/16 kernel and 24/32 threades, the 8 kernel can remain on auto but I have a reserve anyway.

The QVL is not reliable at all CMK256GX4M8A2400C16 ver5.49 or better said we have not real specification or diagram of memory controller inside AMD-CPU.

Edited by Arny006
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The QVL haven't 128 kit at 3200 Mhz. I looked at a overclocking-video using CMD128GX4M83200C16 but with AMD tr4 2000WX.

The trick is: 1.2 Volts by SPD, XMP-1 2933, XMP-2 3200, timings 16-18-18-36, set XMP-1 (@ 2933 MHz) increase frequency to 3000 and finally (by more than 8 kernel/16 threads) increasing V (voltage) to 1.425.

The voltage increasing is needed only by 12/16 kernel and 24/32 threades, the 8 kernel can remain on auto but I have a reserve anyway.

The QVL is not reliable at all CMK256GX4M8A2400C16 ver5.49 or better said we have not real specification or diagram of memory controller inside AMD-CPU.

 

 

The issues with the integrated memory controller on the first generation of Zen CPUs was widely documented and covered by the technical press.

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Can you post some of those article?

Anyway in your specs is missing the frequency at A-XMP-1, the remaining data are ok.

 

I have already a 64-GB kit running (stable) at XMP-2 (2933) + 67 MHz + 3000.

 

The question is: Would the kit above have XMP-1 = 2933?

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