ryzen

[nerdnooby]

hello i am wondering if people can help me i have heard a rumor about ryzen cpu's having problems with dual and quad channel ram and that they cart support ram that is above 2400mhz does any one know any thing about as im thinking about buying one

[Imakuni]

10 minutes ago, nerdnooby said:

hello i am wondering if people can help me i have heard a rumor about ryzen cpu's having problems with dual and quad channel ram and that they cart support ram that is above 2400mhz does any one know any thing about as im thinking about buying one

For starters, they don't support Quad channel, it's a Dual channel limited platform. Don't mistake that for being limited to 2 DIMMS, though, as those are 2 different concepts - you can run 4 sticks fine, they'll just run in dual channel (same as a Sky/Kaby processor).

 

Next, that 2400mhz thingie... er, Ryzen's not doing so well on the RAM OC department. Some sites got to 3000mhz, some got stuck at 2666, others got to 2933, another couldn't even get past 2133... it's a mess right now. But give it time and I'm sure they'll fix this; for the record, Skylake also wasn't that amazing at RAM compatibility once it launched, it just wasn't as bad as Ryzen is right now.

 

 

As for buying Ryzen, it depends on what you want for your PC. You'd need to explain your situation a bit better before we can say if it's worth it or not.

[mariushm]

AMD says Ryzen officially supports :

 

Dual-Channel/Dual-Rank/Four-DIMM : 1866 Mhz
Dual-Channel/Single-Rank/Four-DIMM : 2133 Mhz
Dual-Channel/Dual-Rank/Two-DIMM : 2400 Mhz
Dual-Channel/Single-Rank/Two-DIMM : 2667 Mhz

 

Higher frequencies are possible, but at the moment most BIOSes on AM4 boards and the Ryzen processors don't expose enough memory parameters that would allow memories to run at frequencies higher than 2667 Mhz reliably. 

So in a month or a couple of months after updating bios on your motherboard, you would probably be able to use even 3200 Mhz memories. You can use such high frequency memories right now, but for the moment you'd have to configure them at 2400-2600 Mhz.

 

It's just a temporary issue, suchthings happen with any new architecture.

[Evanair]

1 hour ago, mariushm said:

frequencies higher than 2667 Mhz reliably. 

3200 Mhz Stable, 2 dimms.  Got this all on Day 1-2 of launch, so I really don't understand people's problems with getting stuff to work.

[Imakuni]

14 minutes ago, Evanair said:

3200 Mhz Stable, 2 dimms.  Got this all on Day 1-2 of launch, so I really don't understand people's problems with getting stuff to work.

Quick question, are your sticks dual or single rank?

[Evanair]

3 minutes ago, Imakuni said:

Quick question, are your sticks dual or single rank?

No idea honestly.
 

Here's what I'm running: https://www.newegg.com/Product/Product.aspx?Item=N82E16820233859&cm_re=corsair_ddr4_3200-_-20-233-859-_-Product

 

Edit: Had the wrong speed linked, fixed.

[Imakuni]

Just now, Evanair said:

No idea honestly.
 

Here's what I'm running: https://www.newegg.com/Product/Product.aspx?Item=N82E16820233831&ignorebbr=1&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Memory+(Desktop+Memory)-_-N82E16820233831&gclid=Cj0KEQiAl4TGBRDhgvmikdHPsdABEiQAtBcc8CEGzlxl6pCwA3_bYzbgCKPgpHArBs2qw0Y_lf5_rtMaAh8i8P8HAQ&gclsrc=aw.ds

Rule of thumb: 4GB sticks are single rank, 8 (and 16) are dual.