x470 vs x370 memory overclocking - Overclock.net - An Overclocking Community

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x470 vs x370 memory overclocking

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post #1 of 27 (permalink) Old 01-07-2019, 03:25 AM - Thread Starter
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x470 vs x370 memory overclocking

Consider I use bios mods and manually tweak memory timings on an x370 will there still be any extra overclocking headroom on an x470 platform?

I'm currently using an x370 prime pro from asus which seems to be the most developer and community supported board on these forums as well as hardwareluxx. I'm wondering if I will still gen any extra benefit when going to x470 in terms of memory OC.

And if so then which brand has best memory support? Asus or MSI?
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post #2 of 27 (permalink) Old 01-07-2019, 10:13 AM
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I guess, if any benefit, it would come more from the imc of the news cpus, and not solely from the motherboard + new bioses..

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post #3 of 27 (permalink) Old 01-07-2019, 12:56 PM
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I used same RAM Kits and CPU between C6H and C7H and so no difference in RAM OC achieved. This was 3466MHz 2x8GB Samsung B die. Recently acquired a 3rd 2700X which does do 3600MHz, sadly do not have C6H to test it on any more.

The Stilt posted this on Anandtech.

Quote:
AMD has revised the memory layout design guidance with Pinnacle Ridge targeting motherboards (i.e. 400-series) in an effort to potentially make the higher memory frequencies possible.

While this might theoretically improve the frequencies on some motherboards, generally the frequency limiting factor is the memory controller itself and not the topology the motherboard uses for memory signaling. Because of that, the newer 400-series motherboards alone should not be expected to provide improved memory frequencies at least by a significant margin.
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post #4 of 27 (permalink) Old 01-07-2019, 01:02 PM
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Like gupsterg, my B350F/R5 1600 and X470 Prime/R7 2700 get same results using same G.Skill FlareX 3200. Zero Difference. I briefly used the 2700 on the B350F and same thing.
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post #5 of 27 (permalink) Old 01-07-2019, 10:34 PM - Thread Starter
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Quote: Originally Posted by gupsterg View Post
I used same RAM Kits and CPU between C6H and C7H and so no difference in RAM OC achieved. This was 3466MHz 2x8GB Samsung B die. Recently acquired a 3rd 2700X which does do 3600MHz, sadly do not have C6H to test it on any more.
Hmmm thanks guys. This is very interesting.

I have a pair of b-die Adata XPG d41 AX4U360038G17-ST41 which is 17-18-18-38, and I've run it on 3 boards (Gigabyte B450 Aorus M, Asrock B350m pro 4 and Asus X370 prime pro), and I've not been able to get it past 3266 stable. This is across a 2600 and a 2600x.

So I guess I'll hold off on selling the prime pro off in favor of some x470 board for a higher price. If It doesn't let me get higher mem clocks it'd be a pointless purchase.
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post #6 of 27 (permalink) Old 01-07-2019, 10:35 PM - Thread Starter
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Quote: Originally Posted by rdr09 View Post
Like gupsterg, my B350F/R5 1600 and X470 Prime/R7 2700 get same results using same G.Skill FlareX 3200. Zero Difference. I briefly used the 2700 on the B350F and same thing.
What was your best result btw?
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post #7 of 27 (permalink) Old 01-07-2019, 11:54 PM
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Quote: Originally Posted by pyromaniac1 View Post
What was your best result btw?
Pretty identical for both motherboards for 3466 Fast Preset. I did try 3533 speed on the X470 and was able to boot to Windows fine but have not gamed on it.
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post #8 of 27 (permalink) Old 01-08-2019, 01:08 AM
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Quote: Originally Posted by pyromaniac1 View Post
Hmmm thanks guys. This is very interesting.

I have a pair of b-die Adata XPG d41 AX4U360038G17-ST41 which is 17-18-18-38, and I've run it on 3 boards (Gigabyte B450 Aorus M, Asrock B350m pro 4 and Asus X370 prime pro), and I've not been able to get it past 3266 stable. This is across a 2600 and a 2600x.

So I guess I'll hold off on selling the prime pro off in favor of some x470 board for a higher price. If It doesn't let me get higher mem clocks it'd be a pointless purchase.
All B die is not the same, so you may see someone clock better or worse. But what creates the bigger disparity is IMC quality and some what UEFI options/development.

I've had 2700X 1835 PGS ~1.5weeks, I've experienced/had C6H/C7H/ZE with Ryzen gen 1/2 and Threadripper since launch. At times I've used same ram kits between each.

C6H + Ryzen gen 1 originally 3200MHz was a push at launch for me. Slowly as AGESA/UEFI developed 3466MHz was stable/sound for daily use. ZE+TR from launch 3200MHz was easily had, few months later 3466MHz for me. C7H + Ryzen gen 2 3466MHz was easily had at launch, now on my 3rd CPU and nabbed 3533MHz C15 1T at SOC 1.025V VDIMM 1.35V. Latest UEFI released few days ago nabbed 3600MHz C15 1T.

Spoiler!


The RAM sticks used above, used to top out at 3466MHz on C6H + gen 1 or ZE + TR gen 1, usually needed more than 1.35V. Same do 3533MHz with 1.35V on C7H + gen 2 and as shown above 3600MHz at 1.385V.

At times I know I given upto 1.4V to claim 3466MHz stability on the older setups. The reason I believe it was needed was weaker IMC. Elmor shared OC guide in C6H thread, in there you see a note where VDIMM limit is considered from IMC side. So IMO VDIMM requirement is not just based on RAM IC, but also RAM IMC, it must have something to do with the link between each IMO. Thus I see same RAM clock higher at lower VDIMM than other setups I've had in my hands.
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post #9 of 27 (permalink) Old 01-08-2019, 01:24 AM
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Depands on which boards you campare. If you compare the X370-Pro with X470-Pro there will be a huge ram oc potential with two stick single rank.
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post #10 of 27 (permalink) Old 01-08-2019, 03:46 AM
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I had quite variable results myself with different boards (all 300 series). The Prime X370 Pro instantaneously threw errors above 3200MHz, while my GB B350 G3, while not stable, would only have random errors at 3333MHz (could took hours to find, which mislead me to think it was stable). My GB X370 G5 was stable at 3466MHz. So while 400 series isn't automatically better, there can be a lot of variance between different products. Don't know if the X370 Pro is just particularly bad at memory, because I have never seen someone stable above 3200.
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