Ryzen ram calculator - no boot

mikehhhhhhh · 15 May 2020 at 12:19

So I have recently upgraded from an old 4690k to a 3600.

I purchased some Corsair Vengeance ram with it - 3600Mhz CL20 stuff. Now everything on the internet seems to tell me I need to get Dram calculator and tighten up timings.

I did this, imported XMP profile from Thaiphoon and chose safe settings. I managed to find settings for all the timings, as well as the voltages and procODT.

However, the system goes into a boot loop when I apply them and seems to back off some of the values.

I tried XMP and that caused instability until I updated the BIOS, where it's now stable.

Should I be happy with XMS settings? Am I missing a voltage or setting? I've read the Samsung B-die should be pretty good, but is 3600Mhz the big limit on timings?

opethdisciple · 16 May 2020 at 13:43

Before you set your ram speed you need to know what your max FCLK is. Then you set you're ram speed to 2 X FCLK.

Then use the dram calc to give you the timings at that ram speed.

It may be the case that 1800 FCLK is to high for your chip.

nutsnut · 20 May 2020 at 01:06

From my experience, I needed more dram voltage than the calculator suggested, otherwise it wouldn't post. I needed 1.42 for safe settings where the calc recommended 1. 35v. I now run the fast settings at 1.45v.

Joxeon · 20 May 2020 at 01:52

Set XMP then load up ryzen master and the dram calc, use ryzen master to compare your XMP settings to the safe timings and voltages of the Dram calc and try to find something in between. Don't adjust any timings with ryzen master though always do that in the bios.

opethdisciple · 20 May 2020 at 12:12

As I said, forget the memory for now. Push your FCLK up to 1900 and see if it is stable.

Continue to drop the frequency until you find a frequency which is stable.

Then run your ram at 2 x this frequency.

Use the calculator for the timings.

Street · 22 May 2020 at 14:04

I had the same with my new RAM the other day. I was upgrading from 16GB 3200c16 to 32GB 3600c16. I stuck it in, set it to XMP and it didn't boot so clocked it down to 3200 to get it to start and thought I'd set it up manually to get to 3600 instead. I imported the details to DRAM Calculator from Thaiphoon burner but it chose really aggressive timings. It was recommending C14 at 3600! I tried these on the off chance and had no joy so changed the profile in DRAM Calculator to A0. This gave me more realistic timings than Manual and the Fast timings were a bit more aggressive than stock and worked fine.