Question Zen 4 builders thread

[Markfw]

I know its early, but as someone pointed out, I better get my ram now before the scalpers are all over it.

To go with a 7950x, what do you think of this ram:

https://www.newegg.com/g-skill-32gb-288-pin-ddr5-sdram/p/N82E16820374369?Item=N82E16820374369

(edited for my best recommendation, 12/5/2023)

 

[AdamK47]

Why does it say limit is 95c? My understanding is that it is higher than that. Ryzen Master needs a patch perhaps?

I thought it was always 95C for Zen4.

 

[Markfw]

I thought it was always 95C for Zen4.

Yes, and let me know how you do on the timings, as I can learn off of that.

 

[Hans Gruber]

Tried CL30 with the G.SKILL memory and received an error in Prime95 within a minute. Even with the memory voltage at 1.4V. It worked with my Intel system. CL32 is working so far 10 minutes into Prime95.

Also lowered Twr from 96 to 72 and Row Cycle Time from 147 to 128. Just shots in the dark.

You should probably run everything close to default just to make sure everything is good in Prime 95. I consider a computer stable if it can run Prime 95 30 minutes or more. I would say 60 minutes but I don't have the patience for that.

Just because it says your ram is 1.4v doesn't mean you should set it at 1.4v. Start at 1.45v for a few days and lower the timings with higher voltage. Then dial it back down towards 1.4v after you get it stable. I wouldn't worry about the sub timings based the CL and the next 4 timings.

It's probably going to take them close to 6 months to get the bios squared away. You guys are the early adopters. We all get to watch your successes and failures from the peanut gallery.

 

[AdamK47]

You should probably run everything close to default just to make sure everything is good in Prime 95. I consider a computer stable if it can run Prime 95 30 minutes or more. I would say 60 minutes but I don't have the patience for that.

Just because it says your ram is 1.4v doesn't mean you should set it at 1.4v. Start at 1.45v for a few days and lower the timings with higher voltage. Then dial it back down towards 1.4v after you get it stable. I wouldn't worry about the sub timings based the CL and the next 4 timings.

It's probably going to take them close to 6 months to get the bios squared away. You guys are the early adopters. We all get to watch your successes and failures from the peanut gallery.

I don't consider it stable unless I run 8 hours of Prime95 small FFT. Follow that with a combination of memtest and 512K+ FFT Prime95 for 8 hours. Then another 8 hours of AIDA64 stability test.

 

[moinmoin]

Regarding tuning memory timings if it were Zen 2 or 3 I'd recommend 1usmus' Ryzen DRAM Calculator. That hasn't been updated for Zen 4 and DDR5 though (apparently hasn't been updated since 2020). His new tool is called Hydra and he appears to plan to include a calculator for Zen 4 with DDR5 there (it includes the kitchen sink...), but that tool neither easily available nor does it seem to have many fans. Would be interesting to know if there are other good sources nowadays.

I thought it was always 95C for Zen4.

95°C is the default set limit. The fused max of the chips is 115°C afaik so there's still headroom.

 

[DrMrLordX]

Timings are still loose. I could use a few pointers on manually tightening them up.

Tbh if I were you, I'd do your research on OCN or MAYBE XS if you can find anyone alive over there.

edit:

AMD DDR5 OC And 24/7 Daily Memory Stability Thread

www.overclock.net

here's the relevant thread. @Det0x is already over there. Not a lot of info yet.

 

[Justinus]

If it helps, this weekend when I get mine on the test bench I can post the entire 6000C30 Expo profile(s) for use as a baseline.

 

[zinfamous]

Well, you guys just let me know when you need to cheaply dump some Zen2/3 and RDNA 2 parts...I need some upgraded dropins for my current X470 w/ Vega64 to power my (totally maybe or maybe not) upcoming sim rig.

(I need to push 7680 x 1440 @ 120fps+ )

 

[eek2121]

CPU arrives Sunday. RAM monday. No idea on the motherboard. NewEgg says release date is 10/7. I suspect the date may get pushed again.

A MicroCenter 4 hours from me has them in stock. Tempted to drive there.

 

[eek2121]

Well, maybe my caution was not un-needed. See this link. He said kits were getting scarcer (to paraphrase) https://forums.anandtech.com/thread...ure-lakes-rapids-thread.2509080/post-40815455

And of all the ram, the fastest made will be the most scarce.

We will have to see how quickly things restock.

 

[igor_kavinski]

(I need to push 7680 x 1440 @ 120fps+ )

Maybe with a 5800X3D in Siberia!

 

[igor_kavinski]

A MicroCenter 4 hours from me has them in stock. Tempted to drive there.

Yeah. That is an unenviable conundrum for you. Do you wait for a mobo that wasn't made in volume as much as the other form factors and you could keep waiting for months? Or do you go get the one you can at Microcenter and then get the other one delivered right next day?

 

[scineram]

After gathering more ASUS silicon quality prediction data, the SKU's seems to be very tightly binned
View attachment 68430
Actually a little too tight to tell us anything meaningful..

What do the SP numbers mean? Never heard of them before?

 

[AdamK47]

Tbh if I were you, I'd do your research on OCN or MAYBE XS if you can find anyone alive over there.

edit:

AMD DDR5 OC And 24/7 Daily Memory Stability Thread

www.overclock.net

here's the relevant thread. @Det0x is already over there. Not a lot of info yet.

I looked into it earlier. Not many with CPUs and boards yet.

 

[AdamK47]

I'm glad I kept my 32GB of Corsair Dominator Platinum 6200. They seem to do better at 6000 compared to the 6600 G.SKILL memory.

 

[Det0x]

What do the SP numbers mean? Never heard of them before?

The SP-Rating is a score given to a processor depending on how 'good' the preprogrammed V/F points are. The rating itself is designed to signify the overclocking potential of a processor, with a higher rating more than likely to be a good overclocker than a chip with a lower rating.

Generally, higher SP = better overclock on average. But there are outliers that can overclock high anyway even with low SP rating. SP is just Asus' attempt to quantify OC performance by comparing individual processors stock VID against Asus' own test statistics. Lower default VID (presumably) = higher SP rating

Higher SP number can mean better silicon quality and theoretical higher overclocking headroom

 

[AdamK47]

The SP-Rating is a score given to a processor depending on how 'good' the preprogrammed V/F points are. The rating itself is designed to signify the overclocking potential of a processor, with a higher rating more than likely to be a good overclocker than a chip with a lower rating.

Generally, higher SP = better overclock on average. But there are outliers that can overclock high anyway even with low SP rating. SP is just Asus' attempt to quantify OC performance by comparing individual processors stock VID against Asus' own test statistics. Lower default VID (presumably) = higher SP rating

Higher SP number can mean better silicon quality and theoretical higher overclocking headroom

It didn't seem to provide much insight on the Intel side with the 12900KS. The Asus prediction wasn't in line with what people were seeing in actual overclocks. Low SP scores were getting higher overclocks at less voltage compared to those with a higher SP. My 12900KS is a particularly good sample. Don't know the SP since I used a Gigabyte board. KS CPUs with a lower SP were clocking higher compared to the original K CPUs.

Maybe it's different and actually a viable indicator on the AMD side.

 

[Det0x]

It didn't seem to provide much insight on the Intel side with the 12900KS. The Asus prediction wasn't in line with what people were seeing in actual overclocks. Low SP scores were getting higher overclocks at less voltage compared to those with a higher SP. My 12900KS is a particularly good sample. Don't know the SP since I used a Gigabyte board. KS CPUs with a lower SP were clocking higher compared to the original K CPUs.

Maybe it's different and actually a viable indicator on the AMD side.

You can only compare SP numbers within a SKU. 12900k vs 12900ks dont work..
Anyway, its not an exact science.. But it can give you a helping hand in finding cpus with the best V/F points

Over to something else, i have finally received some of my new parts

 

[Justinus]

You can only compare SP numbers within a SKU. 12900k vs 12900ks dont work..
Anyway, its not an exact science.. But it can give you a helping hand in finding cpus with the best V/F points

Over to something else, i have finally received some of my new parts
View attachment 68464

I see you still got a TechN block. I have a brand new optimus foundation waiting for me to use, I'd be interested to see some details about stock temps/power/boost on that to compare (silicon lottery willing)

 

[Det0x]

I see you still got a TechN block. I have a brand new optimus foundation waiting for me to use, I'd be interested to see some details about stock temps/power/boost on that to compare (silicon lottery willing)

Yes i will try to mount the TechN block and check the contact.. give me a few mins
Have to do something, my optimus foundation wont be here until early next week..

 

[Justinus]

Yes i will try to mount the TechN block and check the contact.. give me a few mins
Have to do something, my optimus foundation wont be here until early next week..

Haha oh I didn't realize you were getting both. Dang, you can give directly comparable figures then. Awesome!

 

[Det0x]

Mount seem fine eventho the manufacture is not sure:

Based on all information we have so far, our AM4 cooler is compatible with the upcoming AM5 socket. Nevertheless, we can’t guarantee it before we have tested it with the actual parts. We will keep you posted.

 

[Justinus]

Mount seem fine eventho the manufacture is not sure:

View attachment 68480View attachment 68479View attachment 68481View attachment 68482View attachment 68483

I am so anal I'm probably going to spatula the TIM all over the IHS including the legs. Good showing for cooler mounting, though.

I should probably do the same for the optimus block. I have some spare GC Extreme that will do the job.

 

[repoman0]

Microcenter is offering free G.Skill 32GB DDR5-5600 EXPO kits with a CPU purchase. Just grabbed mine along with a 7900X and X670E Taichi ... $1000 out the door. I almost held off upgrading my 5900X Oh well, this platform should have quite a lot of life in it.

 

[Markfw]

They're here !!!!! About $6,000 worth of hardware in this picture, and I have more that I am using for these two systems, like cases and another HSF (not here yet), and another 1300 watt PSU, and another 3090TI FTW3, about $2000 more, so $8,000 for 2 high end 7950x systems with matching 3090TI's and 1 tb nvme drives and 32 and 64 gig fast ram.