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Corsair Memory on X370 Gaming K4

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mgilbert View Drop Down
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    Posted: 23 Mar 2017 at 3:20am
Has anyone had any luck getting Corsair Vengeance LPX 3,000 MHz 16 GB memory kits to run at greater than 2,400 MT/s? on the X370 Gaming K4 board?  I have installed EFI 1.70...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 23 Mar 2017 at 5:17am
C'mon. Post the specific Corsair Part Number will ya.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mgilbert Quote  Post ReplyReply Direct Link To This Post Posted: 23 Mar 2017 at 5:24am
Sorry about that...

CMK16GX4M2B3000C15

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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 23 Mar 2017 at 5:30am
Are you using XMP to set them in the BIOS?

And, so you're aware, Ryzen doesn't have a 3000 of 3400 mem divisor yet the BIOS, assuming this kit is compatible, will drop it down to like IIRC 2933 to cover no 3000 divisor
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Post Options Post Options   Thanks (0) Thanks(0)   Quote parsec Quote  Post ReplyReply Direct Link To This Post Posted: 23 Mar 2017 at 11:47am
Originally posted by mgilbert mgilbert wrote:

Sorry about that...

CMK16GX4M2B3000C15



The 3000 kit is not listed in your board's Memory QVL, no doubt due to Ryzen not supporting a 3000 speed memory divider. I see a similar model kit (4 x 8GB) at 2666, so your memory should run at that speed. If that works, try 2933.

I would also skip the XMP profile, or try it but set the memory speed manually. Also, the Ryzen memory controller seems to only want to work at a Command Rate of 1T, so try setting that manually, since Auto will probably give you 2T.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twf85 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Mar 2017 at 1:04am
Originally posted by parsec parsec wrote:

I would also skip the XMP profile, or try it but set the memory speed manually. Also, the Ryzen memory controller seems to only want to work at a Command Rate of 1T, so try setting that manually, since Auto will probably give you 2T.

Where in the BIOS would I adjust this setting? I've been scouring through it and I can't seem to find anything showing "1T", "2T", "Command Rate", or "CR". I updated to the latest stable BIOS (1.60) hoping to get my sticks up to 2933, but nothing seems to work. I know they're not on the QVL, but I was hoping the new BIOS would at least let me get to 2666. Still can't push beyond 2400.

As always, your vast knowledge is very appreciated!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 29 Mar 2017 at 1:28am
Originally posted by twf85 twf85 wrote:

Originally posted by parsec parsec wrote:

I would also skip the XMP profile, or try it but set the memory speed manually. Also, the Ryzen memory controller seems to only want to work at a Command Rate of 1T, so try setting that manually, since Auto will probably give you 2T.

Where in the BIOS would I adjust this setting? I've been scouring through it and I can't seem to find anything showing "1T", "2T", "Command Rate", or "CR". I updated to the latest stable BIOS (1.60) hoping to get my sticks up to 2933, but nothing seems to work. I know they're not on the QVL, but I was hoping the new BIOS would at least let me get to 2666. Still can't push beyond 2400.

As always, your vast knowledge is very appreciated!


I want to say, with 99.99% certainty, that changing CR/N/T is not possible on Ryzen systems. Everything I've read doesn't mention it and even AMDs own Ryzen Master Utility doesn't.

Over time an ingenuous person may make a util to do so. But BUT that assumes there's a hidden BIOS option to even toggle. And so far I haven't read or heard that changing it is possible.



 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 29 Mar 2017 at 1:32am
Originally posted by twf85 twf85 wrote:

Still can't push beyond 2400.


You went with 32GB, or 64GB?

IIRC, it was 32GB. 4x8GB or 2x16GB?

4x8GB is quite a strain on most any IMC, AMD or Intel, to push Mhz higher, or OC with.
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