[SOLVED] RAM timing compatibiltiy with Ryzen

[ic00042]

Hello,

I have a AMD Ryzen 5 2600 and I know that Ryzen are quite peculiar with their RAM timings. I can't get my XMP to work on my motherboard so I plan to manually set my RAM speeds.

The RAM I have is 3200mhz and the timings are 16-18-18-36. Would it be okay for me to stick to these timing if I was to manually set the speed to 3200mhz?

The current default is at 1066mhz per RAM and the timings are 15-15-15-36. It's currently running very stable.

Thanks!
-Irene

 

[Roland Of Gilead]

Hi Irene,

Yes, that's exactly how you do it. You also have to set mem voltage to 1.35, which is typically the voltage for most XMP/DOCP settings.

Fire them up and see how you get on.

Which mobo do you have?

 

[ic00042]

Hi Irene,

Yes, that's exactly how you do it. You also have to set mem voltage to 1.35, which is typically the voltage for most XMP/DOCP settings.

Fire them up and see how you get on.

Which mobo do you have?

Hello!

I'll give that a shot. However, when I did set the XMP profile for my RAM, it did power cycle 3 times before properly booting up. But still, the speeds were not regonised when I checked with CPU-Z and Speccy.

The motherboard I'm using is Aorus X470 Gaming 7

 

[Roland Of Gilead]

Hello!

I'll give that a shot. However, when I did set the XMP profile for my RAM, it did power cycle 3 times before properly booting up. But still, the speeds were not regonised when I checked with CPU-Z and Speccy.

The motherboard I'm using is Aorus X470 Gaming 7

What's the exact model DIMMs?

Have you the most up to date bios for the mobo? I'd start there. The most recent one for yours is here: https://www.gigabyte.com/ie/Motherboard/X470-AORUS-GAMING-7-WIFI-rev-10/support#support-dl-bios

It's the F50 version. Make sure you have that, and if you haven't, update it and do a CMOS clear afterwards. Then try XMP again.

 

[ic00042]

What's the exact model DIMMs?

Have you the most up to date bios for the mobo? I'd start there. The most recent one for yours is here: https://www.gigabyte.com/ie/Motherboard/X470-AORUS-GAMING-7-WIFI-rev-10/support#support-dl-bios

It's the F50 version. Make sure you have that, and if you haven't, update it and do a CMOS clear afterwards. Then try XMP again.

The model of the DIMMs is CMW32GX4M2C3200C16. Corsair Vengeance RGB Pro 2x 16GB.

And yep, I have the most up to date version of the BIOS (F50). I've already cleared the CMOS too. So I'm not sure why XMP seems to be causing some disruption. With my old RAM I had no problem with XMP though. It ran perfeclty normal.

 

[Zizo007]

The model of the DIMMs is CMW32GX4M2C3200C16. Corsair Vengeance RGB Pro 2x 16GB.

And yep, I have the most up to date version of the BIOS (F50). I've already cleared the CMOS too. So I'm not sure why XMP seems to be causing some disruption. With my old RAM I had no problem with XMP though. It ran perfeclty normal.

Are you sure your new RAM is in the memory compatibility list of your motherboard? Its on your motherboard's manufacturer website. It needs to be there for XMP to work stable.

 

[Roland Of Gilead]

So, those DIMMS aren't on the QVL, but that doesn't mean they won't work. Only that they haven't been tested and it might require some tinkering around to get them to work.

I'd suggest taking a pragmatic approach. Given they work fine at default, lets see what speeds we can hit. Leaving all timing's on auto and mem voltage at 1.35, just bump the mem speed in increments 2400mhz, 2800, 3000 etc. Test using memtest86+ with each increase to ensure it passes 4 passes. Once you hit a wall, we have an idea of where the DIMMs can bet set speed wise, then we can see about timings after that.

Edit: BTW, do you have any other components OC'ed? CPU/GPU? if so, might be worth just running at stock while troubleshooting.

 

[Zizo007]

Yea they might still work with tweaking but not guaranteed like those in the memory compatibility list.

 

[ic00042]

Are you sure your new RAM is in the memory compatibility list of your motherboard? Its on your motherboard's manufacturer website. It needs to be there for XMP to work stable.

No, unfortunatly it's not on there. Which is why I think XMP isn't working. But nontheless, the RAM is running stable when in default state.

So therefore I'm wanting to manually adjust the speeds/timings but not sure if this is a safe to do so?

So, those DIMMS aren't on the QVL, but that doesn't mean they won't work. Only that they haven't been tested and it might require some tinkering around to get them to work.

I'd suggest taking a pragmatic approach. Given they work fine at default, lets see what speeds we can hit. Leaving all timing's on auto and mem voltage at 1.35, just bump the mem speed in increments 2400mhz, 2800, 3000 etc. Test using memtest86+ with each increase to ensure it passes 4 passes. Once you hit a wall, we have an idea of where the DIMMs can bet set speed wise, then we can see about timings after that.

Edit: BTW, do you have any other components OC'ed? CPU/GPU? if so, might be worth just running at stock while troubleshooting.

Thank you for your suggestions. I'll go ahead and bump the speeds up and run a memtest each time and see eventually if it can run stable at 3200mhz. I'll let you know!

And nope, all my other components are running at default.

 

[ic00042]

So, those DIMMS aren't on the QVL, but that doesn't mean they won't work. Only that they haven't been tested and it might require some tinkering around to get them to work.

I'd suggest taking a pragmatic approach. Given they work fine at default, lets see what speeds we can hit. Leaving all timing's on auto and mem voltage at 1.35, just bump the mem speed in increments 2400mhz, 2800, 3000 etc. Test using memtest86+ with each increase to ensure it passes 4 passes. Once you hit a wall, we have an idea of where the DIMMs can bet set speed wise, then we can see about timings after that.

Edit: BTW, do you have any other components OC'ed? CPU/GPU? if so, might be worth just running at stock while troubleshooting.

So it's running pretty stable at 3000mhz. The timings from "auto" selection are at 22-21-21-50. Would it be okay to leave it at this?

 

[Zizo007]

So it's running pretty stable at 3000mhz. The timings from "auto" selection are at 22-21-21-50. Would it be okay to leave it at this?

Those are slow timings. Timings are usually printed on your RAM modules including voltage.

 

[ic00042]

Those are slow timings. Timings are usually printed on your RAM modules including voltage.

Yes you're right. I was following the suggestion from keith12. So I should follow the exact timings stated on my RAM modules and manually input them?

 

[Zizo007]

Yes you're right. I was following the suggestion from keith12. So I should follow the exact timings stated on my RAM modules and manually input them?

Yes, don't forget the voltage.

 

[ic00042]

Yes, don't forget the voltage.

Right, I just tried setting it to 3200mhz with the timings specified and it wasn't able to boot up.

 

[Zizo007]

Right, I just tried setting it to 3200mhz with the timings specified and it wasn't able to boot up.

Its because they are not in the memory compatibility list of your mothetboard. Try 3000Mhz. You need to return that RAM and get one from the list if you want to run at advertised speed.

 

[ic00042]

Its because they are not in the memory compatibility list of your mothetboard. Try 3000Mhz. You need to return that RAM and get one from the list if you want to run at advertised speed.

Yep. If I try 3000mhz, what should my timings be set to?

 

[Zizo007]

Yep. If I try 3000mhz, what should my timings be set to?

First find the stable freq using timings and voltage written on your memory modules.

 

[ic00042]

First find the stable freq using timings and voltage written on your memory modules.

The timings written on the modules are 16-18-18-36-54. So I should start with 2400mhz with these timings and work my way up?

 

[Zizo007]

The timings written on the modules are 16-18-18-36-54. So I should start with 2400mhz with these timings and work my way up?

Yep, don't forget the voltage.

 

[Roland Of Gilead]

Hey there,

Sorry for the late reply., with all this virus stuff, have been getting used to some changes this week.

That's good you're making progress with them. As mentioned it takes time and trial and error to get them working.

So, now you have the ram running at 3000mhz, and the timings are on auto as you highlighted above.

I would now go and open up the SPD tab on CPU-z, and look at the timings there for 3000mhz, or close. In fact it might be a good idea to post a screenie of that here

I would then take a set of timings in between stock and XMP profile and set the timings at that and voltage at 1.35. If you can boot/test with those timings, then note them down as a baseline. Then after that you can think of getting the timings down lower each time. CL is the most important.

You can try bump the SOC voltage up a notch. If it's set at 1.2 then up it to 1.21, this can sometimes help with unstable ram.

If you are pretty sure you have them stable at 3000mhz, then you can try Ryzen Dram Calc to fine tune the timings.

 

[Roland Of Gilead]

Also,. for peace of mind, and some clarity. Ryzen does indeed love fast ram. For the most part the biggest gain comes from between 2400mhz-3000mhz. The difference can be as much as 10-20% task dependant, but specially gaming. However, the difference between 3000mhz and 3200mhz is about 2-5% at best. In terms of gaming it translates to just a few extra FPS. So, although you may not hit max speeds on the DIMMS, you won't be losing too much by not.