Is Ryzen ram speed based on CPU or mobo?

[PholkLorr]

I have an Asrock AB350M (not Pro4 version) and 1600. It cannot run my 3200 ram at native speed. At most only 2933. I also have 3600 mhz ram. I want to buy R5 3600 and use in the AB350m mobo but im not sure if the lousy ram speed is due to the 1600 cmi, or the B350 mobos cmi. Anyone knows?

 

[_DeS__]

Flash with the latest bios should solve your issue

 

[PholkLorr]

I updated to intermediate BIOS already, not the latest. Mobo manufacturer advice is not to upgrade to latest BIOS if youre not using Zen 2.

 

[_DeS__]

Just do it. Thank me later

 

[Koenig168]

RAM speed depends on both the CPU and MB. The Ryzen 3600 can handle DDR4-3600. The MB might be able to handle DDR4-3600 if you update to the latest BIOS as memory compatibility has been improved by the latest AGESAs.

 

[totopetz]

Sharing my experience on resolving similar issue. However, we have different motherboard, processor and RAM, so not sure if it can be of any help to you.

My setup:
- Asus TUF Gaming X570 (Wifi-plus)
- Ryzen R3700X
- Corsair Vengeance RGB Pro 4x8GB 3600MHz 18-22-22-22-42, 1.35V

Issue:
- when motherboard was stock, I could boot with RAM's DOCP (aka XMP) profile
- updated motherboard BIOS earlier this month, and system failed to boot with DOCP profile. System will only boot when I dialed down the RAM speed in BIOS to 2933MHz.

Solutions:
Leaving RAM settings in BIOs as "Auto" or any settings that you could boot up with, then:
(1) Use Ryzen Master software to overclock the RAM to the same as DOCP profile; OR
(2) Use "AMD Overclocking" option in "Advanced" section of the BIOS to overclock the RAM to the same as DOCP profile.

I was able to boot the system with any one of the above solutions. Btw, I am currently running the RAM at 3733MHz CL17 without changing other timings and voltage. Infinity fabric is at 1866MHz (same frequency as RAM speed), fyip.

WARNING - please note that if you are not able boot the system after using the above method(s), you MUST reinstall the BIOS as clearing BIOS CMOS will NOT help.

I have an Asrock AB350M (not Pro4 version) and 1600. It cannot run my 3200 ram at native speed. At most only 2933. I also have 3600 mhz ram. I want to buy R5 3600 and use in the AB350m mobo but im not sure if the lousy ram speed is due to the 1600 cmi, or the B350 mobos cmi. Anyone knows?

 

[coyote]

Still have people over clocking their cpu... Surprise.

 

[Koenig168]

we are talking about OCing RAM not CPU. It makes quite a bit of difference with RAM at DDR4-3200 and DDR4-3800 (highest I ever got my RAM to).

 

[yusoffb01]

if your board supports faster ram, then changing your cpu will work

 

[coyote]

we are talking about OCing RAM not CPU. It makes quite a bit of difference with RAM at DDR4-3200 and DDR4-3800 (highest I ever got my RAM to).

Back at time when I still overclock. Ram and cpu speed needs to be synchronised. But since cpu is much faster than ram, they are usually synchronised by a same bus speed, eg. Bus speed is 800Mhz, DDR = double data rate at 800Mhz and cpu is 4 or more times of bus speed = 3.2Ghz depending on how fast the cpu can scale. So, all these are synchronised through the motherboard and so when you adjust your bus speed to say 820Mhz to adjust your memory speed, your cpu speed may be adjusted to 3280MHz if you cannot change the multipliers. Some cpu like G4560 allows you to change the multiplier so that you have more flexibility to overclock your cpu and ram.

That's the time when overclocking was prevalent.

 

[Rashkae]

Back at time when I still overclock. Ram and cpu speed needs to be synchronised. But since cpu is much faster than ram, they are usually synchronised by a same bus speed, eg. Bus speed is 800Mhz, DDR = double data rate at 800Mhz and cpu is 4 or more times of bus speed = 3.2Ghz depending on how fast the cpu can scale. So, all these are synchronised through the motherboard and so when you adjust your bus speed to say 820Mhz to adjust your memory speed, your cpu speed may be adjusted to 3280MHz if you cannot change the multipliers. Some cpu like G4560 allows you to change the multiplier so that you have more flexibility to overclock your cpu and ram.

That's the time when overclocking was prevalent.

Yeah, but AMD ditched the FSB way before Intel did.

 

[Rashkae]

I have an Asrock AB350M (not Pro4 version) and 1600. It cannot run my 3200 ram at native speed. At most only 2933. I also have 3600 mhz ram. I want to buy R5 3600 and use in the AB350m mobo but im not sure if the lousy ram speed is due to the 1600 cmi, or the B350 mobos cmi. Anyone knows?

So, you have a few issues:

1. Your motherboard ROM may not be large enough for the new BIOS
2. You have a budget board, so they may not have invested much in trace quality
3. Your board may be daisy chain or t-topology
4. The memory controller on the old 1600 were not as good as the newer ones.

If you can hit 2933 stable, that's good for that hardware.

 

[PholkLorr]

I've seen videos where they tested it on Asrock AB350M PRO4 and it worked well. Heck, their 3600 ran even slightly faster on AB350M than X570.

Just bought the 3600 first, will test and update if it runs well. If can't run the ram at 3200, ill just buy a B550 mobo when it releases

 

[azarel]

Just do it. Thank me later

yah i'm running the exact setup ASROCK AB350M running ryzen 3600 and i could run my rams at 3200 mhz with the latest bios. upgraded my cpu which was previous ryzen 1600 to 3600 and bought new rams just for the bling bling light show.

 

[ah_khoo]

both board & cpu does matter. cpu as in d imc where else board would depend on the QVL supported ram list.

if ram is not in QVL then prepare for d worst, b450 board especially used unit is not that pricey nowadays.

 

[PholkLorr]

To answer my question, and anybody else who might have the same question: Ryzen ram speed depends on the cpu and mobo.

Flashed my Asrock AB350M (NOT pro4) to latest Bios 5.60. Ryzen 1600 could still work properly. Was a bit worried that it wouldn't, cause the Mobo Bios page said not to use the latest Bios if you're using Raven Ridge.

The latest Bios did not improve memory compatibility vs the older 4.70 Bios. My Corsair Vengeance 3200 was still only able to run stably at 2933. My Crucial Ballistix Elite 3600 was able to run at 3600 single stick, but only 3400 dual stick.

Swapped the Ryzen 1600 for 3600. No change to Corsair vengeance. But my Ballistix Elite 3600 was able to run 3600 dual channel easily by setting XMP Profile.

 

[_DeS__]

Lousy corsair rams.

 

[Clearnfc]

Its both. Although mem controller is in CPU, RAM and BIOS is part of the board. AGESA is part of the BIOS. Board design is affects OC stability.

 

[SkyShroud]

The memory controller is on your cpu so it might be your bios issue.