Do CPU limit max RAM speed?

[ivanteng880]

Hi, I’m thinking about buying a AMD Ryzen 5 1600X and on spec it says that the max supported RAM is 2667mhz. Does that mean I can only put 2667mhz or slow ram in it? Because i found a G skill trident Z which is 3200Mhz.(BTW my motherboard does support that speed, but I have to overclock it, and how would I overclock it? I have asus b350-F gamming) would it with that cpu? Will it decrease the ram speed to the max supported Ram speed?

[Jurrunio]

CPUI does limit max RAM frequency, but not to the listed frequency. It's 3200MHz for Ryzen 1000 series because that's as high as the multiplier goes (32x) and memory controller can handle.

 

If you get Ryzen 2000 series and 400 series motherboard, then you can go higher through the clock gen chip on some motherboards (multiplier is still 32x)

[ivanteng880]

6 minutes ago, Jurrunio said:

CPUI does limit max RAM frequency, but not to the listed frequency. It's 3200MHz for Ryzen 1000 series because that's as high as the multiplier goes (32x) and memory controller can handle.

 

If you get Ryzen 2000 series and 400 series motherboard, then you can go higher through the clock gen chip on some motherboards (multiplier is still 32x)

So the 3200mhz ram and my cpu will play nicely together? And will the cpu automatically adjust to that speed or do I have to do something mannually inorder for it to work? And my mobo need to be over locked inorder to use 3200mhz ram, how would I do that? @Jurrunio

[Brooksie359]

9 minutes ago, Jurrunio said:

CPUI does limit max RAM frequency, but not to the listed frequency. It's 3200MHz for Ryzen 1000 series because that's as high as the multiplier goes (32x) and memory controller can handle.

 

If you get Ryzen 2000 series and 400 series motherboard, then you can go higher through the clock gen chip on some motherboards (multiplier is still 32x)

That is false. You can reach higher than 3200 on ryzen 1 cpus it's just hard. The memory controllers aren't that great and often times struggle to get above 2933. That being said if you watch gaming performance with different memory speed benchmarks for ryzen 1 you can clearly see that they can get above 3200.

[Jurrunio]

10 minutes ago, ivanteng880 said:

So the 3200mhz ram and my cpu will play nicely together? And will the cpu automatically adjust to that speed or do I have to do something mannually inorder for it to work? And my mobo need to be over locked inorder to use 3200mhz ram, how would I do that? @Jurrunio

it should, but there are people complaining that their DOCP profiles arent stable unless they use a much lower value, say 2800.

 

Try enable DOCP profile in the memory settings.

4 minutes ago, Brooksie359 said:

That is false. You can reach higher than 3200 on ryzen 1 cpus it's just hard. The memory controllers aren't that great and often times struggle to get above 2933. That being said if you watch gaming performance with different memory speed benchmarks for ryzen 1 you can clearly see that they can get above 3200.

technically yes because there are people with 3333Mhz RAM on Ryzen 1000 series, but it's dumb because the memory timings are very loose and lowers the transfer rate a lot. Also, Vccsa and Vccio (Intel names, not sure if they are different on AMD) are often raised to dangerous levels to do so.

[Brooksie359]

4 minutes ago, Jurrunio said:

it should, but there are people complaining that their DOCP profiles arent stable unless they use a much lower value, say 2800.

 

Try enable DOCP profile in the memory settings.

technically yes because there are people with 3333Mhz RAM on Ryzen 1000 series, but it's dumb because the memory timings are very loose and lowers the transfer rate a lot. Also, Vccsa and Vccio (Intel names, not sure if they are different on AMD) are often raised to dangerous levels to do so.

"Most key? You can push RAM all the way to 4000MHz (whoa) without changing the system’s reference clock now, and do so in 133MT/s intervals, enabling a far wider range of overclocked speeds." https://www.google.com/amp/s/www.pcworld.com/article/3180511/components-processors/7-amd-ryzen-tips-and-tricks-to-maximize-your-pcs-performance.amp.html 

yeah wrong again.

[Jurrunio]

4 minutes ago, Brooksie359 said:

"Most key? You can push RAM all the way to 4000MHz (whoa) without changing the system’s reference clock now, and do so in 133MT/s intervals, enabling a far wider range of overclocked speeds." https://www.google.com/amp/s/www.pcworld.com/article/3180511/components-processors/7-amd-ryzen-tips-and-tricks-to-maximize-your-pcs-performance.amp.html 

yeah wrong again.

Yeah in theory. Any actual users, not testers who can search for hundreds, if not thousands of CPUs and RAM sticks for one well-binned part, reporting that? Even from the sources, only DDR4 3520 is listed from someone most likely having a lot of time and resources to search for binned parts.

[Brooksie359]

8 hours ago, Jurrunio said:

Yeah in theory. Any actual users, not testers who can search for hundreds, if not thousands of CPUs and RAM sticks for one well-binned part, reporting that? Even from the sources, only DDR4 3520 is listed from someone most likely having a lot of time and resources to search for binned parts.

You said they were hard limited to 3200. If you want to talk about the chances of being able to reach a certain speed then go ahead. Don't go spreading misinformation about hard limits of ram speed that don't actually exist. 

[i_build_nanosuits]

9 hours ago, ivanteng880 said:

1-So the 3200mhz ram and my cpu will play nicely together?

2-And will the cpu automatically adjust to that speed or do I have to do something mannually inorder for it to work? 

3-And my mobo need to be over locked inorder to use 3200mhz ram, how would I do that? @Jurrunio

1- no not really, the Gen1 Ryzen memory controler is wierd and it does not play nice with fast RAM...it's more likely to find stablility around 2933mhz and maybe 3000mhz...3200mhz is possible it has been seen but it's uncomon

2- You have to enable the XMP memory profile in the BIOS for the memory to run at it's rated speed otherwise it will run at 2666mhz

3- see number 2