Does lower clock speeds always allow tighter timings?

Associate
Joined
19 Dec 2017
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713
I'm on the hunt for some RAM.

I want 4x8GB and would ideally purchase it from a competitor that only sells corsair as I have credit to use, however that's not set in stone.

I've narrowed it down to two options. More expensive with tighter timings vs a cheaper RGB option but loser timings. RGB would be nice, but not essential

Corsair Vengeance LPX 4000Mhz C16-16-16-36 @ £328
Corsair Vengeance RGB Pro 4000Mhz 18-22-22-42 @ 286

I wanted to give 4000Mhz a go, to see if my 5800x would do 2000 fclk.

I think I'd be happy with 2000fclk and C18, but if the CPU won't do it, do timings scale with clock speeds in such a way that makes say C16 or lower @ 3600Mhz likely?
 
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Soldato
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15 Oct 2019
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I doubt you will get 4 sticks running at 4000mhz on ryzen even if your 5800X can do 4000 FCLK you might even struggle with 3600, going for a 2x16kit might enable you to do it though.
 
Associate
Joined
2 Oct 2009
Posts
475
I'm on the hunt for some RAM.

I want 4x8GB and would ideally purchase it from a competitor that only sells corsair as I have credit to use, however that's not set in stone.

I've narrowed it down to two options. More expensive with tighter timings vs a cheaper RGB option but loser timings. RGB would be nice, but not essential

Corsair Vengeance LPX 4000Mhz C16-16-16-36 @ £328
Corsair Vengeance RGB Pro 4000Mhz 18-22-22-42 @ 286

I wanted to give 4000Mhz a go, to see if my 5800x would do 2000 fclk.

I think I'd be happy with 2000fclk and C18, but if the CPU won't do it, do timings scale with clock speeds in such a way that makes say C16 or lower @ 3600Mhz likely?

if £328 is a budget that’s ok with you, I would suggest looking for the 2x16gb 3800 cl14. You have a much higher chance at setting Xmp with those instead of having to manually set both primary and secondary if xmp doesn’t boot at 4000.

some of the primary numbers will define what you should set you secondary timings like,tRC, tRAS and tRFC for example, but you should be able to tighten most secondary timings the same regardless of MHz. Ram voltage will be the main factor though.
 
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