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AM4/Ryzen Specific Memory and Tips

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Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
Printed Date: 04 Oct 2022 at 4:49am
Software Version: Web Wiz Forums 12.04 -

Topic: AM4/Ryzen Specific Memory and Tips
Posted By: wardog
Subject: AM4/Ryzen Specific Memory and Tips
Date Posted: 09 Mar 2017 at 4:47am
" rel="nofollow - Tip #1. Don't fall prey to Cursair's very deceptive"Are you ready for Ryzen" page at

It is is implied that ALL mem on the above page is compatible with ALL Ryzen motherboards. IT IS NOT

Tip #2. When using two memory sticks, they belong in slots A2 and B2
. No if's and's or but's.

Tip #3. Buy a 2 stick Kit in the capacity with the lowest latencies you can afford. Latency rules with Ryzen.

Tip #4. Ryzen loaded with 4 sticks is locked/limited to 2133(Singled Rank) and 1866(Dual Ranked)
(I am checking into this as it appears it has changed since Pre-Launch Data was available)

Tip #5. If in doubt what IC's are used on your memory sticks go to" rel="nofollow - and download the Freeware version of Thaiphoon Burner.

Tip # 6. procODT

Q - Now if I could find some literature on PROC Ohms I'd be happy. How high is reasonable on Ram Ohms?

A - There will be no "reasonable' value.

procODT is derived from many variables(mem to CPU traces, CPU, Memory, "noise' levels over traces, voltages etc) and thus EACH Users computer will be different.

Consider procODT to be a tolerance level, in laymans terms.

Two old skool, and now outdated with the settings/options, for reference ONLY.

Those two pages have great background/info on procODT. But again, since both are rather dated now, the #'s themselves are ....... not up to date. Fortunately, their desc of the function IS applicable to today.

Due to todays much improved design and manufacturing processes the #'s used in the above links are now outdated.

AMD's own list of Ryzen Compatible Memory(Link compliments of parsec)

AMD Community Updates:

Discover what G.Skill offers for your particular motherboard:

Then, here are links to NewEggs inventory:

G.Skill Fortis Enthusiast Memory

G.Skill Flare X Performance Memory

Great Thread at concerning Memory ICs for Ryzen:

RyMem - the easiest way to see if your RAM will work with AM4

Do you want to buy a Ryzen system but have difficulties checking if a specific RAM is going to work for SURE? Or vice versa, you already bought a stick but don't know which motherboards was it tested with? Look no further.

Use the below tools to find Guaranteed compatible memory for your motherboard.

I've removed Cursairs Memory Finder until such time as they bring it up to date. Currently, their site is missing all manufacturers Z270 and all manufacturers Ryzen chipset compatible memory. That makes it hard/impossible for us Moderators here to discover compatibility concerns that may be your issue.

Posted By: wardog
Date Posted: 15 Jul 2017 at 5:31am
Updated bump

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