Infinity fabric clock uplift would make DDR4-4000 possible for Zen 3

Goiur

2020-10-16 15:26

Has not been a week since i bought a 3600 cl16 kit, jokes on me!! If this is true ill give a try to OC the **** out of the kit, but first lets wait for reviews first.

#5843371

theoneofgod

2020-10-16 15:29

Goiur:

Has not been a week since i bought a 3600 cl16 kit, jokes on me!! If this is true ill give a try to OC the **** out of the kit, but first lets wait for reviews first.

E-die?

#5843385

Goiur

2020-10-16 16:07

theoneofgod:

E-die?

No clue lol edit: 99% its hynix

#5843437

bluedevil

2020-10-16 17:52

https://notkyon.moe/ram-latency.htm This whole high hz ram is mostly bullshit because the timings also get high. 4000 cl 18 is no better than 2000 cl 9. It's the timings /hz that matter. On a sidenote ddr4 3200 cl 14 is actually a bit faster then ddr4 4000 cl 18 . There is also a thread somewhere on guru3d that tests the impact of different timings and subtimings on performance. Edit: https://forums.guru3d.com/threads/ram-timing-benchmark-cl-trcd-trp-tras-cr-trc-trfc-tref.346758/ I'm not sure about the real advantage of running ram 1 to 1 with the fabric on ryzen. We would need a 2 kits that don't differ when calculating frequency sv latency one running at 1 to 1 with the fabric and the other asynchronous . Most tests don't account for the frequency vs latency calculation.

#5843455

abula

2020-10-16 18:16

Man i really wished AMD would have said something like they did on their Zen2 presentation posting about the inifinity fabric and the memory sweetspots chart with 3733 / 3600 / 3200... they should have said something with Zen3.... i though it they didn't mention, the ram and infinity would have remain the same... but now im going to have to wait for 3rd party reviewers to test memory and find the sweet spot. I'm grateful for this article/warning, i already had some Corsair 3600CL14 on order, now its cancelled until i see reviews.

#5843459

Goiur

2020-10-16 18:32

abula:

Man i really wished AMD would have said something like they did on their Zen2 presentation posting about the inifinity fabric and the memory sweetspots chart with 3733 / 3600 / 3200... they should have said something with Zen3.... i though it they didn't mention, the ram and infinity would have remain the same... but now im going to have to wait for 3rd party reviewers to test memory and find the sweet spot. I'm grateful for this article/warning, i already had some Corsair 3600CL14 on order, now its cancelled until i see reviews.

The I/O chip its the same. The changes they made to the CCX/CCD probably will change some things but i doubt it will be much. They said (if i recall correctly) that RAM wise, what worked for the 3000 would work for the 5000.

#5843467

GREGIX

2020-10-16 18:55

Undying:

I knew we gonna need a new ram kit with zen3, 3200 is not gonna cut it. 4000mhz cl19 costs 290Eur here atm which isnt that bad.

I just bought tridentZ 2*16gb 3200 14-14-14-34 that I know does 4100c15. ~~230€>amazon.it. U can give m a try. I'll surely do. My patriots 2*8 did 4100 c15, g.skill my go not the same, depends ifmy CPU/mb will hold it.

#5843474

Mufflore

2020-10-16 19:30

Jawnys:

I have a ddie kit on my intel 7700k from gskill 3200mhz and ive been pusing it to 3733 at cl 17 for five years so im sure that edie kit can do well on ryzen system for sure, i do have a bdie kit on my 3900x and run it at 3733 cl16 without issue

I also have Ddie, but Corsair Vengeance LPX: 3000c15 that clocks the same as your Ddie, 3733c17. Been running for 5 years ish without a problem so far.

#5843487

Kaleid

2020-10-16 19:57

Nope, not changing RAM once again. 32GB 3600 CL16 will have to do. "4000mhz cl19 costs 290Eur here atm which isnt that bad." That's almost twice as much as I paid for my current RAM. For 400Mhz more and increased CL? Nah, nope, ain't happening. DDR5 is next

#5843492

doorspaulo

2020-10-16 20:16

Cidious:

I have 3 sets of Edie 32GB (2x16) 3200 CL16.. THEY ALL DO 4600 with reasonable voltages and timings. The only difference in binning between the kits is the tRFC which doesn't result in huge performance differences. Then I have 1 kit of Bdie 3200CL14 from Gskill. I can tell you the Edie costs half and delivers the same.. ALL edie kits can go above 4000. Most even up to 5000. (look for buildzoid on Youtube...) Don't waste your money on expensive bdie.. it's not worth it.. I've benchmarked the kits against each other at max 1900/3800 and tightest timings. MINIMAL margin in unnoticeable performance. Not worth spending double the money for! https://www.reddit.com/r/Amd/comments/eyoff9/please_stop_mindlessly_advising_people_to_buy/ my thread is still viable today. Please have a read. Please don't buy into the marketing! Don't waste your cash...

This is gold man! Thanks.

#5843511

Neo Cyrus

2020-10-16 20:59

wavetrex:

Don't bother... The actual performance difference between 3200 and 3800-4000 will probably be small, and only show up in some edge cases. Especially considering the massive amount of cache, ALL addressable by every single thread (including that pesky "primary thread" of games), memory speed will probably play an even less role in Zen 3 than it did in Zen 2 (unless you choke it hard with 2133-2400 JEDEC speed or something like that)

OCing my RAM/Fabric/Controller from 1800MHz to 1900MHz gave me a real-world uplift of 5%+ fps in games (usually much higher more around 10%), even single/dual threaded ones. That's with significantly worse timings on the RAM to OC it from 1800/3600 to 1900/3800MHz. Maybe it was just the games I was playing (only tested 3), and on my specific system, but I'd be pretty surprised if the uplift for most people going from 1600MHz Fabric/RAM/Controller to 2000MHz wasn't a decent amount. But then again all that would be on Zen 2, I don't know enough about the changes in Zen 3 to know if it would matter as much.

#5843552

tunejunky

2020-10-16 22:43

right now in California ddr4 4000 is still only sold in 8gb sticks so any itx build would be 16gb ram max. the pricing is very good (here) and 32gb of ddr4 4000 cost less than the 16gb of ddr3 2800 (x4gb sticks) on my X99 back in the day. right now for whatever reason both Thermaltake and Patriot have both high supply, but the Patriot ALSO has a range of non RGB @ 4000 that saves around $20-30 per kit

#5843578

Askmyteapot

2020-10-17 00:36

For those that have older DDR4 Kits... I am currently using a set of G.Skill TridentZ RGB 16GBx2 with an XMP of 3200 CL16-18-18-38-56. They are Hynix AFR dies. Currently with my 3900X on a x570 Gigabyte Aorus Elite. 3800-16-19-19-38-57 and a tRFC of 480 Nets me a Latency of 65.4ns. Just takes time to dial in the right stable settings.

#5843587

waltc3

2020-10-17 01:51

I'm already running 4x8GB 3733Mhz 16-19-19-19-39-68 1T Gear Down, with apparently perfect stability according to P95, Patriot Viper Steel DIMMs. x570 Aorus Master, bios F30. 3900X. With 1usmus's CTR b3 program I'm running the ram at that speed and settings, CCX's 1&2 4350MHz and CCX's 3&4 4175MHz CPU @1.30V max. I can run the ram @ 3800MHz but it's a tad unstable, so 3733Mhz it is! Very happy with that so far.

#5843648

Lily GFX

2020-10-17 10:46

Bought memory before we changed from Intel to AMD Zen2 so both kits are actually for "Intel". One is a G.Skill 32GB kit 4133 CL17 and other is a G.Skill 16GB kit 4400 CL18, both run currently @3733 16-16-16-16-32 1T. So still have some headroom on both. Both kits was cheaper than 3200 and 3600 kits when we bought them and still was cheaper for a long time after because most people bought 3200 or 3600 instead. Money saved ,better performance and still usefull on Zen3 if higher speeds are possible. ^^

#5843674

kapu

2020-10-17 13:14

My B-Die is waiting( tf2d416g4000hc18edc01) , it can push up to 4400Mhz , i think 4000 with low CL will be sweet spot.

#5844108

Jawnys

2020-10-18 23:16

i have 2 kits from hyperx ddr 4000mhz at cl 19, im running them at 3733 cl 16 now, cant wait for my new 5900x 🙂 tweak madness fun times ahead

#5844268

Ub3rslay3r

2020-10-19 13:32

I'm looking at two different memory kits (planning to buy a new Zen 3 CPU). Is there any reason I should buy the Crucial kit over the G.Skill? The timings for G.Skill are lower and the price is better. Here are the newegg links for both: Crucial kit: https://www.newegg.com/ballistix-32gb-288-pin-ddr4-sdram/p/N82E16820164165 G.Skill kit: https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820374021

#5844317

tunejunky

2020-10-19 15:12

Ub3rslay3r:

I'm looking at two different memory kits (planning to buy a new Zen 3 CPU). Is there any reason I should buy the Crucial kit over the G.Skill? The timings for G.Skill are lower and the price is better. Here are the newegg links for both: Crucial kit: https://www.newegg.com/ballistix-32gb-288-pin-ddr4-sdram/p/N82E16820164165 G.Skill kit: https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820374021

i personally like the Patriot Viper Steel Series, but you found just about the only 16gb sticks @ 4000Mhz. all things considered, go for the lower timings and the lower price. both Crucial and G.Skill are excellent. crucial makes its own memory modules but g. skill is extremely consistent.

#5844323

Ub3rslay3r

2020-10-19 15:23

tunejunky:

i personally like the Patriot Viper Steel Series, but you found just about the only 16gb sticks @ 4000Mhz. all things considered, go for the lower timings and the lower price. both Crucial and G.Skill are excellent. crucial makes its own memory modules but g. skill is extremely consistent.

Thanks for the recommendation! After some additional searching, I do see that the G.Skill kit uses Samsung B-die, so that's nice too. My biggest concern is that I've heard dual rank B-die is difficult for the Ryzen memory controller, but with how far the Ryzen CPUs have come, I don't think it will be an issue for the Zen 3 CPUs.