So that’s not a 1:1 ratio you need it running at 1900 with 3800mhz ram for best performance, or 1800 with 3600mhz and that would perform better or equal to the faster ram because of the unlinked fclk speed
Which overclock is better for gaming?
- Thread starter breathe3asy
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So that’s not a 1:1 ratio you need it running at 1900 with 3800mhz ram for best performance, or 1800 with 3600mhz and that would perform better or equal to the faster ram because of the unlinked fclk speed
Ok cool, just running some tests in Aida64 is it the latency benchmark I should be most interested in?
Yea latency is what you want to see getting better but don’t lose the bigger picture you want the full spread to be getting better.
Like if you game. The difference between linked and unlinked can be seen unless you have a bottle neck in the system
Frame timing and 1% low should be a lot better.
I don't know how to improve my 1% lows but yea I think I am heavily GPU bound but good to know my RAM is in the best position for when I do slot a new card in
100% slower is always better…
Explain your reason behind this please.
If both your ram and IF can go faster push it, the common 3600/1800 is because with the 3xxx and below chips that was about the max most chips could do. But a higher 1:1 ratio is better end off. Ryzen feed off ram speed, since the first gen ryzen as been ram bottle necked
Tighter timings. May bring more performance than 200MHz but loosen timings.
RAM speed isn’t simply “faster better”.
Many fast RAM kits around with very poor timings.
If the OP does some tests, I’ll be surprised if there’s much difference, anyway.
He may try 3600’s timings on 3800MHZ and may not even need extra voltage as 200MHz isn’t a lot.
But we are talking about infinity fabric link speed not just ram. There is more to consider with amd
One click cycle on the timings will make zero real work gains in games but a faster IF that’s at a 1:1 ratio dose it’s been shown in testing from gen 1 ryzen all the way to the current line up
3800mhz 16-16-16-32
or
3600mhz 14-15-14-30
That was the original question.
IF will affect other things, but from the memory speed point of view, that was my take.
Soldato
Agreed.
Helps if you're running a 1:1 RAM to infinity fabric speeds or your performance tanks.
Soldato
If you ran the infinity fabric at 1900 mhz with the 3800 CL16 RAM, that might be ideal. Otherwise you're not at 1:1 parity so it might lose performance even with the increase in RAM speed.
Also, it's not 3800mhz. It's 3800 MT/s. Core speed is half as much as it's a double data rate. There's two actions taken per mhz.
Those 3600MHz timings have actually faster absolute latencies.
14 cycles at 3600 MHz is ~7.78ns
16 cycles at 3800 MHz is ~8.42ns
And then there's need to maintain IF in sync with memory bus.
Or there's 15% increase in memory access latency hitting minimum fps performance with sledgehammer.
1900MHz isn't in any way certain achievement for IF.
Finally got round to tuning this and settled on 3800mhz, for reference figures seemed to be slower when running 3600mhz with tighter timings, but could I get a sense check on the below please? Do those latency values look OK? Trying to tune for gaming.
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