Memory OC

[vilianbb]

I have a b450 tomahawk which supports up to 3466 and a ryzen 2700.
Now, I don't know why,  how or where, but i heard sometime ago that if you overclock your memory to be some other ratio than the infinity fabric or something like that, bad stuff happens. ( is it supposed to be like 1:1 - i don't know.)
And because of that, i was running an XMP profile - 3200.

Are there any pros and cons if i run at a higher speed (3466)

 

Can you please explain, as I'm not very informed about these things. 
Thanks

[Otto_iii]

1 hour ago, vilianbb said:

I have a b450 tomahawk which supports up to 3466 and a ryzen 2700.
Now, I don't know why,  how or where, but i heard sometime ago that if you overclock your memory to be some other ratio than the infinity fabric or something like that, bad stuff happens. ( is it supposed to be like 1:1 - i don't know.)
And because of that, i was running an XMP profile - 3200.

Are there any pros and cons if i run at a higher speed (3466)

Thats with Ryzen 3000, in your case the best DRAM speed is the highest it can go while stable, if you are at 3200 speed likely that is about as good as it can get on Ryzen 2000, the CPU+DRAM generally just get unstable after that.  Ryzen 2000, particularly if its a mildly OC'd 2700 is within a whisker of the performance of a R5 3600, so you should be in a really comfy spot performance wise, without need to tweak more.  Your Cons of running 3466 is that it may be unstable, which could cause multiple problems, BSODs, worst case brick the OS.  If you ran it and it passed 12 hour memory test in memtest86 (or memtest64 if need be) and all games ran and launched good it could be beneficial, but its rare Ryzen 2000 will run speeds that high. 

Ryzen 3000 has crazy but interesting layout, of note 4000 redesign is mostly targeting the latency with IO die, memory controller, and between the CCDs (don't know exactly how, but likely moving them as close together physically, or just connecting them in such a way latency is reduced drastically)

Heres a good explanation of how 3000 memory works. 

 

[vilianbb]

Well, i tested my system when i builded it - half a year ago.
I can run stable under full load at 4.1 ghz at 1.3625v + 3466mhz at 1.38v . However the cpu draws like 160 W of power and gets pretty  hot - 85C (Im using freezer 34 duo btw), so i opted not to go heavy overclocked. Right now, im sitting on 3.95 ghz and xmp profile two (3200) and temps are a wonder! bearly hits 70 under aida 64.
Do you think using 3466 is recommeneded, if I don't have any crashes?
Thanks