RAM timings for CMW32GX4M4C3600C18 on ROG STRIX X570-E GAMING WIFI II

[tscman]

Hi all, would anyone care to share some reliable RAM timings for this motherboard (ROG STRIX X570-E GAMING WIFI II) for 4 x 8GB sticks of Corsair Vengeance Pro (CMW32GX4M4C3600C18)?

 

I've checked that this RAM is in the compatibility list for this board.

 

I find that this mobo seems to be auto-detecting a slower transfer rate (2133MHz) but much more aggressive timings (the RAM is spec'd as 18-19-19-39 and it is setting something like 15-15-15-36).

 

This leads to no POST when I adjust the DRAM freq manually to 3600MHz and I can't for the life of me locate the XMP/EXPO settings under the "AI-Tweaker" thing (perhaps this RAM has only XMP and no EXPO profiles).

 

I have set the 4 critical timings down and got a POST/boot, but I would like to be sure nothing else is set too extreme, and there are a LOT of timing settings.

 

cheers!

Dave

[GraysonJ90]

29 minutes ago, tscman said:

Hi all, would anyone care to share some reliable RAM timings for this motherboard (ROG STRIX X570-E GAMING WIFI II) for 4 x 8GB sticks of Corsair Vengeance Pro (CMW32GX4M4C3600C18)?

 

I've checked that this RAM is in the compatibility list for this board.

 

I find that this mobo seems to be auto-detecting a slower transfer rate (2133MHz) but much more aggressive timings (the RAM is spec'd as 18-19-19-39 and it is setting something like 15-15-15-36).

 

This leads to no POST when I adjust the DRAM freq manually to 3600MHz and I can't for the life of me locate the XMP/EXPO settings under the "AI-Tweaker" thing (perhaps this RAM has only XMP and no EXPO profiles).

 

I have set the 4 critical timings down and got a POST/boot, but I would like to be sure nothing else is set too extreme, and there are a LOT of timing settings.

 

cheers!

Dave

I don’t believe the mobo sets ram speed automatically, thats windows. You could just enable DOCP and it would change the timings for you and make them reliable.

[tscman]

33 minutes ago, GraysonJ90 said:

I don’t believe the mobo sets ram speed automatically, thats windows. You could just enable DOCP and it would change the timings for you and make them reliable.

Thanks, but I don't have any software in Windows to configure RAM speeds and if I set the DOCP profile in bios it won't post.

[GraysonJ90]

1 minute ago, tscman said:

Thanks, but I don't have any software in Windows to configure RAM speeds and if I set the DOCP profile in bios it won't post.

I don’t believe there is a software to change ram speed. DOCP not posting probably means the ram isn’t on the motherboards QVL list. Have you checked?

[Mark Kaine]

1 hour ago, WirkKarl said:

Also, ensure the DRAM voltage is set to 1.35V (the rated voltage for your Corsair RAM).

Funny thing neither my corsair vengeance nor my gskill trident will post with 1.35 when overclocked (XMP or otherwise) they need 1.36 minimum...

 

(Also funny when I use XMP the mobo will set it to 1.36 automatically)

 

 

42 minutes ago, PDifolco said:

Use the 3600 XMP profile then drop the speed to 3200, if it doesn't work 3000,

Another weird quirk, I couldn't get my old vengeance 3200 ram (2xkit) to run at 3200, not at 3000, but 2933 worked? 

[PDifolco]

1 hour ago, tscman said:

Hi all, would anyone care to share some reliable RAM timings for this motherboard (ROG STRIX X570-E GAMING WIFI II) for 4 x 8GB sticks of Corsair Vengeance Pro (CMW32GX4M4C3600C18)?

 

I've checked that this RAM is in the compatibility list for this board.

 

I find that this mobo seems to be auto-detecting a slower transfer rate (2133MHz) but much more aggressive timings (the RAM is spec'd as 18-19-19-39 and it is setting something like 15-15-15-36).

 

This leads to no POST when I adjust the DRAM freq manually to 3600MHz and I can't for the life of me locate the XMP/EXPO settings under the "AI-Tweaker" thing (perhaps this RAM has only XMP and no EXPO profiles).

 

I have set the 4 critical timings down and got a POST/boot, but I would like to be sure nothing else is set too extreme, and there are a LOT of timing settings.

 

cheers!

Dave

With 4 sticks there's not much chance you can get it running at 3600MT...

Use the 3600 XMP profile then drop the speed to 3200, if it doesn't work 3000, etc

Let the timing to CL18, when you have a posting PC you can try 16

 

[Mark Kaine]

2 hours ago, tscman said:

I've checked that this RAM is in the compatibility list for this board.

That's the thing, it might be, but 4 sticks are notoriously hard to run, try 1 stick and it's probably immediately "compatible"...

This is really mostly on mobo manufacturers offering 4 ram slots when they know exactly they will only support default speeds reliably (especially on amd boards, but intel is likely not much better with this) 

[PDifolco]

1 hour ago, Mark Kaine said:

That's the thing, it might be, but 4 sticks are notoriously hard to run, try 1 stick and it's probably immediately "compatible"...

This is really mostly on mobo manufacturers offering 4 ram slots when they know exactly they will only support default speeds reliably (especially on amd boards, but intel is likely not much better with this) 

All manufacturers give different max speeds according to number of sticks

And AM4 is quite bad with 4 sticks

[tscman]

Thanks all, you've been helpful.

 

Yes I did recommend that this user not run more than 2 modules but they wanted 4 for more RGB.

 

I did verify that this RAM is validated with this board for 4 modules at once:

 

 

If I take the XMP profile from the RAM (it's one of the overclocking options somewhere) it sets the correct voltage and transfer speed, but doesn't POST.

 

I ended up setting to auto (non-XMP) and voltage was detected correctly (1.35V), and then I just manually set these options:

 

 

BTW, CPU-Z detects Command Rate (CR) as 1T, even though I have checked and double-checked it's set as 2T in the BIOS.

 

The system has been stable and passed Windows Memory Test, OCCT, Furmark etc. at max temperatures.

 

I think we're all good, thanks for the help!