Daily Z790 / DDR5-8200 Setup Video

[ir_cow]

Luumi is part of the XOC community and knows his stuff. I figured I would share his latest video about Z790 + 8200 build for daily use.

I have the same hardware with a few different memory kits that can do 8200. His advice is sound. My only disagreement would be maxing out the tREFI like he did. Anything above 66K is just asking for trouble once those DIMMS warm up. But I am also not a professional overclocker...sooo. Also he doesn't really explain that primary timings and sub-timings will be dependent on the CPU IMC and DRAM quality. Probably can't just type in the same values, but it is a good reference point.

New Links to parts and software:
CPU: Intel i9 13900K
Motherboard: ASUS Z790 Apex (can't find direct - watch out for 3rd party sellers)
Ram 1: G.SKILL Trident Z5 DDR5-8000 (F5-8000J3848H16GX2-TZ5RK)
Ram 2: Patriot Viper Xtreme 5 DDR5-8000 (review coming soon). DDR5-8200 runs fine @ 1.45V

RockItCool Website - I bought the delid for 12th gen. Works on 13th Gen as well (same size and socket).
Contact Frame - Don't spend $$$ Thermalright Frame - I have two of them and using it on the Z790 Apex right now.

Apex Software (Unofficial)
Memtweak / XOC BIOS / Turbo VCore

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I tried out his values and got the best 2.5B Score so far. HWBot 8200. Still not 100% stable, after the CPU heats up, some errors start to show up in mem stress. Stock timings don't though, so this means the sub-timing, primaries or SA / VDD2 / TX is the key to true stability. Probably would take a few days to narrow it down and adjust. Also you 100% need a fan on the ram to keep it below 50c. That is also when the errors start to pop up most often.

 

[tabascosauz]

+1 luumi knows these Intel platforms like the back of his hand. Great OC expertise and professionalism. Deserves way more subs.

Someone really needs to make a DDR5 guide. Each camp is 1 generation into DDR5 now and the only good info is still gleaned from watching random videos and trawling the depths of forums.

 

[ir_cow]

Someone really needs to make a DDR5 guide. Each camp is 1 generation into DDR5 now and the only good info is still gleaned from watching random videos and trawling the depths of forums.

For the LGA 1700 socket, it comes down to a good IMC CPU roll, 2-DIMM MB and how much voltage you are will to jam into the CPU. Mine tops out at 8200 if I want to pass y-cruncher with daily voltages.

 

[sneekypeet]

To be blunt, the Xtreme 5 I have did well with xmp set and I just moved the speed to 8267MHz on mine. No adjustments needed otherwise.

To be fair, I did point a case fan at them.

 

[fevgatos]

Yes, Trefi over 65k is only for watercooled ram. But with DDR5 frequency chasing is kinda pointless, at least for daily usage. A 6000 tuned kit is just as fast as an 8200 - at least for games. I've tried 6000c30 with samsung dies vs 7000c32 on Adies - both on a 12900k, performance was identical.

 

[ir_cow]

@fevgatos realistically yeah perf between the two tweaked would be practically zero for real-world stuff.

Maybe when NVIDIA and AMD come out with new cards that double what the 4090 does, will we see 8200 pull ahead.

Right now it's just for fun. Ryzen X3D CPUs would be a much cheaper option

 

[5mall5nail5]

For the LGA 1700 socket, it comes down to a good IMC CPU roll, 2-DIMM MB and how much voltage you are will to jam into the CPU. Mine tops out at 8200 if I want to pass y-cruncher with daily voltages.

I have no problem passing y-cruncher 1B on 8200 MHz CL36 w/ about 1.46 VDD 1.42VDDQ, but I fail Karhu after like 20 mins. Not sure where to start

Yes, Trefi over 65k is only for watercooled ram. But with DDR5 frequency chasing is kinda pointless, at least for daily usage. A 6000 tuned kit is just as fast as an 8200 - at least for games. I've tried 6000c30 with samsung dies vs 7000c32 on Adies - both on a 12900k, performance was identical.

I won't say it's significant, but you'll see a measurable difference between DDR5 6000 CL30 and 7600 CL36

 

[fevgatos]

I have no problem passing y-cruncher 1B on 8200 MHz CL36 w/ about 1.46 VDD 1.42VDDQ, but I fail Karhu after like 20 mins. Not sure where to start


I won't say it's significant, but you'll see a measurable difference between DDR5 6000 CL30 and 7600 CL36

Can you define measurable? I was running 6000c30 vs 7600c34 on a 13900k, both manually tuned. Couldn't for the life of me notice a difference at complete cpu bounnd scenarios. On the other hand going from 6000c36 XMP to 6000c30 manually tuned the difference was pretty massive and obvious. If I remember correctly i went from 240 fps all the way up to 300 on COD, the exact same scene.

 

[ir_cow]

I have no problem passing y-cruncher 1B on 8200 MHz CL36 w/ about 1.46 VDD 1.42VDDQ, but I fail Karhu after like 20 mins. Not sure where to start

Well It won't be that easy as 1-2-3 .

I suggest dropping down to 8000 and see if that stable with DRAM 1.45V. Next find out what your SA,VDD2 and VDDQ_TX (not DRAM) voltages are.

At 8200, the DRAM is at 1.45V, but this is the only kit I have that can do this. The rest of Hynix A-Die need 1.5-1.55V (if it boots at all this high). Granted the rest are 7200 retail kits, soooo they aren't binned for 8000+

For 8200, I'm using 1.3 SA, 1.4 VDD2, 1.4 TX voltages. Its going to be different per CPU as not all the IMCs are the same. You might be able to run it with lower voltages. My CPU like 1.25V SA a lot more, but 8200 is unstable unless I bump it. 1.35V and I just get errors no matter the frequency. This is the reason why 8200 is my hard limit. Can't raise the voltages anymore, thus while 8600 boots into windows, it won't pass y-cruncher.

Hope this helps in your overclocking journey.