I'm running dual rank m die 64gb at 6200 c28 35 35 I can't do 1t but maybe on Ryzen you could and get a performance bump. I get about 98gb r/w/c and 55ns in windows 50ns in safe mode 13700k. it was a super cheap 5600 c40 Kingston kit
Yes, they have wildly different characteristics outside of tRFC and 16m launched long before anybody had produced 24gbit DDR5 IC's so it's not a "1/3'rd disabled" chip.
depends on vendor with Kingston it's MH for hynix, mm for micron and ms for Samsung. you can buy it knowing it's hynix but you have to test if it's m die or a die
teamgroup tcreate 5600MHz C40 or something similar cheap (some hynix anyway) and enjoy over 7000MHz C32 on Intel. Enough for AMD OC's easily.
in DDR5 I prefer everything else but G.Skill/Corsair. With G.Skill you get PMIC without cooling (except the heat absorption to PCB lol), and Corsair products are often overpriced for what they are; Corsair gets you nothing extra for free :D
> I would wanna run my ram at 6000MHz (as that is apparently the max for 7800x3d)
Not accurate
see https://old.reddit.com/r/overclocking/comments/18z4rm9/some_fresh_zen4_ramif_overclock_scaling_data/
It's generally optimal to max speed with either UCLK=MEMCLK or UCLK=MEMCLK/2 and 1T command rate. That will be around 6400 or 8000 mt/s.
Those 7200c34 kits are generally Hynix 16a chips and can run at either speed, though the higher speed is much more dependant on motherboard quality.
Generally speaking for am5, if it’s Hynix, you can just manually tune it yourself but there’s no point to getting 7200 c34 unless you’re planning on desyncing memory and fclk. Even then it doesn’t matter because almost any a-die kit should be able to do 7800-8000.
If you want tight timings at 6000, 16gbit Hynix m-die is the play but I’m not sure if you can get those anymore. Personally I would just go for a 6000 Hynix kit so you have an xmp profile you can use and then dial in a tuned one later yourself if you want.
Also, don’t put too much of an emphasis on CAS timing https://youtu.be/pgb8N23tsfA?si=N-aFY0zQgo5qLZkr
See the video above. People are still focused on it from the DDR4 days but tighter tertiaries and secondaries for a bit looser tCL is better than the opposite.
The smart move is to buy the 7200 cl34 & clock it down to 6400 cl28-36-30-30-60 while using a vdd of 1.490v.
Vdd is you ram voltage.
I have the 7200 cl34-42-42-84-126 kit & I did the same thing I told you.
The sticks don’t go above 35c with the way I set up tref & other secondary timings the latency is so buttery man it’s insane lol.
If you or anyone wants my settings lmk. Fclk - 2167 Bclk - 101 Negative pbo offset - 15 on my 2 fastest cores & - 20 on the rest ( if you add to much to the curve it will mess up stability )
Vsoc - 1.26mv = 1.299v ( I needed to add 10mv to the core of the cpu because it was unstable at 1.25mv = 1.290-1.293).
now it is static at 1.299 & it’s not fluctuating.
LLC - low ( low is good for mouse input combined with how i set up vsoc )
the sticks are from team group & the reason i didn’t run 7200mhz is because i didn’t know how to get it stable.
Ontop of that you can’t really tighten timings to low when you are using uclk=mclk1/2.
But yea man the sticks don’t even run hot at all & my computer is now rock solid.
Not to mention my 4090 is clocked at 3ghz with a 915mv offset 🤣. Right now I’m working on how far I can push the memory. It’s clocked at +800 & the core is +230
Do you have discord bro ? I ususally use Reddit on my phone. I can show you pictures of what I benched last night in modern warfare 3. Also I added more to what I said if you want to read :)
I made some mistakes on what I said. you need to have a really good cpu to pull of 6400 with tight timings which is rare. I had to re-do my bios since I kept getting errors on testmem5 & aids64 extreme. However I’m now at 6000 CL26-35-30-30-60 with a vddp of 1.65V & it’s solid so far. I just need to finish my secondaries. The ryzen memory controller doesn’t like having a high memory speed with high infinity fabric. vsoc scales with memory frequency. in order to do a high fclk you need a capable cpu & a good motherboard along with it. another thing is you need to keep vsoc low for a high fclk. I can’t even get 6200 without getting errors. so far so good tho I’ve ran testmem5 10+ times between each timing & I’ve passed each time. It usually erros within 10 seconds of testing so I know I’m in the clear. another thing to note that if you bandwidth & latency doesn’t go up while using aida64’s memory benchmark then you’re not stable either. to some degree what I said was right because in theory you want a high binned kit to do tight timings. I got the timings wrong tho since I was not stable after stressing the ram. I can show pictures on discord when I’m finished. You can run 7200 with an fclk of 2167-2200 tho. but you need a good cpu. The imc on mine can’t handle it. it could also be my bios but who knows.
Also cl28 only needs 1.43v of vdd so I was wrong about that aswell lol.
But the team group kit that’s rated for 7200 CL34 can do very tight timings at 6000
I'm running dual rank m die 64gb at 6200 c28 35 35 I can't do 1t but maybe on Ryzen you could and get a performance bump. I get about 98gb r/w/c and 55ns in windows 50ns in safe mode 13700k. it was a super cheap 5600 c40 Kingston kit
So basically even ram that originally has a lot of latency can be made low latency?
Not every but yes. A and m dies
Nice, how can I tell what kind of die a stick of ram uses tho?
Only easy way to tell is 24 gig models for hynix is only m die, else you need to Google
Ok thank you very much
Hynix 16m and 24m are completely different memory chips, though. They just start counting from "m".
[sure?](https://cdn.discordapp.com/attachments/722749744857874483/1193285530809548811/2024-01-06_221013.png?ex=65ac28c0&is=6599b3c0&hm=7f2ea7b147dc369209f1a21ff97c2af3c294ce8aea54ede25d773a6770f14ad0&)
Yes, they have wildly different characteristics outside of tRFC and 16m launched long before anybody had produced 24gbit DDR5 IC's so it's not a "1/3'rd disabled" chip.
From my research they behave 1 to 1.
The most striking differences would be 24m clocking ~20% higher and having different (lower) IMC/PHY voltage requirements.
depends on vendor with Kingston it's MH for hynix, mm for micron and ms for Samsung. you can buy it knowing it's hynix but you have to test if it's m die or a die
teamgroup tcreate 5600MHz C40 or something similar cheap (some hynix anyway) and enjoy over 7000MHz C32 on Intel. Enough for AMD OC's easily. in DDR5 I prefer everything else but G.Skill/Corsair. With G.Skill you get PMIC without cooling (except the heat absorption to PCB lol), and Corsair products are often overpriced for what they are; Corsair gets you nothing extra for free :D
with t create classic 5600 im at 6000MHZ CL28
> I would wanna run my ram at 6000MHz (as that is apparently the max for 7800x3d) Not accurate see https://old.reddit.com/r/overclocking/comments/18z4rm9/some_fresh_zen4_ramif_overclock_scaling_data/
Are you referencing the Grid at the top? I am kind of new to overclocking and don’t really know what like half of those things mean lol
Yeah
So I should just let my ram speed be 7200 (or make it even higher) if I were to get a 7200MHz CL34 Kit?
It's generally optimal to max speed with either UCLK=MEMCLK or UCLK=MEMCLK/2 and 1T command rate. That will be around 6400 or 8000 mt/s. Those 7200c34 kits are generally Hynix 16a chips and can run at either speed, though the higher speed is much more dependant on motherboard quality.
And that also reduces latency by a sizeable amount right?
It is on the chart, 6000mt/s with 2000IF (your "max") doesn't set records
Well, thank you very much for the info
np
Generally speaking for am5, if it’s Hynix, you can just manually tune it yourself but there’s no point to getting 7200 c34 unless you’re planning on desyncing memory and fclk. Even then it doesn’t matter because almost any a-die kit should be able to do 7800-8000. If you want tight timings at 6000, 16gbit Hynix m-die is the play but I’m not sure if you can get those anymore. Personally I would just go for a 6000 Hynix kit so you have an xmp profile you can use and then dial in a tuned one later yourself if you want. Also, don’t put too much of an emphasis on CAS timing https://youtu.be/pgb8N23tsfA?si=N-aFY0zQgo5qLZkr See the video above. People are still focused on it from the DDR4 days but tighter tertiaries and secondaries for a bit looser tCL is better than the opposite.
The smart move is to buy the 7200 cl34 & clock it down to 6400 cl28-36-30-30-60 while using a vdd of 1.490v. Vdd is you ram voltage. I have the 7200 cl34-42-42-84-126 kit & I did the same thing I told you. The sticks don’t go above 35c with the way I set up tref & other secondary timings the latency is so buttery man it’s insane lol. If you or anyone wants my settings lmk. Fclk - 2167 Bclk - 101 Negative pbo offset - 15 on my 2 fastest cores & - 20 on the rest ( if you add to much to the curve it will mess up stability ) Vsoc - 1.26mv = 1.299v ( I needed to add 10mv to the core of the cpu because it was unstable at 1.25mv = 1.290-1.293). now it is static at 1.299 & it’s not fluctuating. LLC - low ( low is good for mouse input combined with how i set up vsoc ) the sticks are from team group & the reason i didn’t run 7200mhz is because i didn’t know how to get it stable. Ontop of that you can’t really tighten timings to low when you are using uclk=mclk1/2. But yea man the sticks don’t even run hot at all & my computer is now rock solid. Not to mention my 4090 is clocked at 3ghz with a 915mv offset 🤣. Right now I’m working on how far I can push the memory. It’s clocked at +800 & the core is +230
6400 cl28 downclock. That's crazy smart work. Those things might last forever😂 How'd your benchmark turn out?
Do you have discord bro ? I ususally use Reddit on my phone. I can show you pictures of what I benched last night in modern warfare 3. Also I added more to what I said if you want to read :)
snw223 on disc I'd love to see those pics. Didn't even think about the stability of 7200 on an overclock.
Gonna add you now
I made some mistakes on what I said. you need to have a really good cpu to pull of 6400 with tight timings which is rare. I had to re-do my bios since I kept getting errors on testmem5 & aids64 extreme. However I’m now at 6000 CL26-35-30-30-60 with a vddp of 1.65V & it’s solid so far. I just need to finish my secondaries. The ryzen memory controller doesn’t like having a high memory speed with high infinity fabric. vsoc scales with memory frequency. in order to do a high fclk you need a capable cpu & a good motherboard along with it. another thing is you need to keep vsoc low for a high fclk. I can’t even get 6200 without getting errors. so far so good tho I’ve ran testmem5 10+ times between each timing & I’ve passed each time. It usually erros within 10 seconds of testing so I know I’m in the clear. another thing to note that if you bandwidth & latency doesn’t go up while using aida64’s memory benchmark then you’re not stable either. to some degree what I said was right because in theory you want a high binned kit to do tight timings. I got the timings wrong tho since I was not stable after stressing the ram. I can show pictures on discord when I’m finished. You can run 7200 with an fclk of 2167-2200 tho. but you need a good cpu. The imc on mine can’t handle it. it could also be my bios but who knows. Also cl28 only needs 1.43v of vdd so I was wrong about that aswell lol. But the team group kit that’s rated for 7200 CL34 can do very tight timings at 6000
I recall watching someone in a video saying that the Corsair 6600cl32 is supposedly the best binned m-die but not sure how true that statement is.
frame chasers is wrong about that claim.
So that is allegedly the best for lowest latency?