Overclocking RAM fails

[Impulse The Fox]

I recently have gotten a motherboard (Prime B350-PLUS) with a CPU (AMD Ryzen 5 1600) and some RAM (2x4GB 3000MHz, Corsair Vengeance).

On default my motherboard sets the RAM frequency to 2133MHz and the voltage to 1.2V. If I try to change the frequency to 2933MHz and the voltage to 1.35V, it boots a few times with 3 short beeps, then once with 1 short beep, then again once with 1 short beep to say "Overclocking has failed.".

What am I doing wrong? Is the voltage too low?

BTW: When I try to use the preset RAM overclocking profile, it just boots once, without any beeps. The fans turn on but everything else remains unpowered and dark. On a restart the same thing happens. I waited for 2 minutes but nothing happened. I had to remove the CMOS and put it in again to fix it. Then everything again runs fine, but only on the default 2133MHz - 1.2V. I've got the latest BIOS update and my RAM sticks are in the recommended slots.

How could I achieve my desired speed? What could be wrong?

 

[Woomack]

It can be BIOS or memory issue. Try if memory works at 2666. I would also try if manual memory settings work. Set something like 2933 16-16-16 1.35V manually. I don't know if on this board you have DDR VTT option. It sometimes helps. Generally it's best when this voltage is at 1/2 of DIMM voltage.

 

[Impulse The Fox]

Yeah, I guess (2nd from the bottom): http://extreme.pcgameshardware.de/a...-aquaduct-360-eco-20170314_200251_resized.jpg (not my pic)
What voltage should I put for 2666MHz? Also 1.35V, or a little less?

I will test this afternoon.

 

[Woomack]

If I'm right then your motherboard won't let you set higher VTT than 1/2 DIMM voltage so just set it to the max.
At 2666 memory will probably run at 1.20V but you can try higher voltage and when you see it's stable then try lower. Try manual timings like 16-16-16 and when you check that all is stable then can try different settings.
At 2666, VTT can stay at auto. Some users reported issues when it was at auto at 2933 or 3200. Personally I had to set it higher on ASUS motherboard when I wanted to stabilize 3200 memory clock.

 

[Impulse The Fox]

Another thing, when you say 16-16-16, do you mean:

(A)
CAS Latency: ?
Read Delay: 16
Write Delay: 16
PRE Time: 16
ACT Time: ?

or

(B)
CAS Latency: 16
Read Delay: 16
Write Delay: 16
PRE Time: ?
ACT Time: ?

Same thing when someone says something like 14-14-14-35, do they mean:

(C)
CAS Latency: ?
Read Delay: 14
Write Delay: 14
PRE Time: 14
ACT Time: 35

or

(D)
CAS Latency: 14
Read Delay: 14
Write Delay: 14
PRE Time: ?
ACT Time: 35


Please explain that to me, thanks.

 

[Woomack]

sorry, I just see it a bit different ... in this case set 16-16-16-16 and 32 or 36 at the end

 

[Impulse The Fox]

Alright, with auto timings it runs on 2133 and 2400. At 2666 it will only boot with 16-16-16-16-32 or (printed on the physical ram stick) 15-17-17-35, but not with auto timings. All on 1.2V though.

On 2933 it doesn't want to boot though: not with auto timings, not with other timings, not with 1.2V, not with 1.35V, not with 1.4V.