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)

 

[eek2121]

And we never heard from him again.

Sorry, same BIOS/UEFI issues as before (except the machine still boots despite the fake “VGA” error, I just don’t see anything prior to Windows login) I actually got distracted, first by doing some productive stuff (Some software I compiled actually compiled in 30% of the time my 5950X took, the 5950X hummed along at 3.8ghz, however the 7950X had no issues with doing the same at an average effective clock of 5,556 Mhz (5.55ghz))

Then even more important: I played Factorio and lost track of time. 😉

As an FYI, you guys should absolutely not be worried about temps. My case is 2 12oz soda/beer cans tall and like 1.25 soda/beer cans wide, my 7950X hits 90C in less than 1% of my workloads (CBr23 and Blender were the only ones to hit 90C), and I guess there is the rub: worst case scenarios matter to folks like @Markfw who run their PC full blast 24/7. For folks like me, the situation is very different. Note that with a 12900k I saw the 230-240W more often then not while my 7950X has peaked at 84.4W in the 6 hours it has been doing stuff today. Intel and AMD chips appear to have very unique power/performance requirements.

Benchmarking these chips is going to be an absolute pain in the neat future. I suspect $ per joule of energy for a given workload will be the way forward.

EDIT: My machine has a 750W PSU fyi.

 

[DisEnchantment]

Ok It seems limiting TDP, PPT and Tjmax is part of the AMD CBS
You can play with these three parameters to your liking.
You can tweak CO and stuffs but too much of a hassle for me.

I just set Tjmax in BIOS to 80, and leave PPT to Auto, around 36K points on CB R23 and 168W PPT.
If you set it to 85 you can get almost all the perf save the last few percent. But for me 80 degrees is fine.

System is very quiet and without the annoying chipset fan too.
And it continuously boost between 5.3-5.75 GHz in a hysteresis loop in order to maintain the set Tjmax when working in single core load.

Windows booted after it went to repair mode and did not ask for activation again.




I love this chip, it is so quiet yet hitting those insane 5.7+ GHz ST and can run all 16 cores on 5 GHz at 80 degrees on 280mm AIO

 

[crisium]

I took advantage of the Microcenter deal recently to upgrade from my aging i7 5820k. -$50 on Mobo ($150) and free 32 GB DDR5 6000 CL36. Man was my old CPU bottlenecking me bad. My frames are so much higher now. Also I'm undervolting and power limitting it without losing performance.

Free RAM made this deal too good even though I know Intel is ahead in gaming right now. Also Zen 5 3D Cache chips are coming in 2025 so that should be a good upgrade as I'll get a faster architecture and the 3D Cache benefits.

 

[DrMrLordX]

Hard to compare temperatures because I do not remember when I started using a fan over the DIMMs. But I did that because I saw temperature encroaching 70C without air flow.

One of the reasons why I do not like the current airflow designs of modern glass-sided cases. Side case fans were perfect for that sort of cooling.

 

[Elfear]

@repoman0 @lopri @Thor86 thanks for chiming in. I'll see if a bios update fixes it.

 

[SK10H]

I also try to do an idle / light load test and see how the Eco PBO 65W mode compare to the good old static 1.025v 4.8Ghz cool and quiet mode. I try to make it as fair as possible on both idle and light load test by not doing anything else. Both obviously include the capturing software usage, so probably not so fair to the PBO side.

Idle* Test

The Eco mode simply cap the PPT as it makes no attempt to lower the overvolted 1.3-1.4 vcore when core speed is only in the 1-4Ghz range. It usually burn 15-25W CPU power. I don't know if it's a limitation because it may degrade the cpu quickly if AMD set it to 1v on low speed and spike to ~1.4-1.52v quickly and repeatedly.

The manual 1.025v static 4.8GHz uses ~7-9W CPU power.



Light load test on streaming quote from Tradingview on 1 Chrome window only

The Eco mode light load test use ~28W on avg, spike to ~46W max CPU power.

The manual 1.025v static 4.8GHz use ~9-12W on avg, spike to 18W max CPU power.



Using Asrock Blazing OC Tuner 1.04 to test, the feature is a bit limited. Although I can set either static OC or PBO mode manually, it does not provide a way to set this by schedule to define how it would run automatically. Also it would have been excellent if I can just right click on systray and select the OC or PBO mode easily instead of opening it up like this.

Since I use this as a 24/7 server/vm/gaming comp, it seems to be more efficient to just set static OC manually most of the time, forget about Eco mode, and only turn on PBO mode through the App when gaming.

 

[Hotrod2go]

Just wanted to give a compliment to Asrock for supplying a hard copy of the motherboard manual with my new X670E Steel Legend board. Out of 3 vendors I've purchased AM5 boards from, Asrock were the only one to do that. Not everyone appreciates digital downloads of what is often vital information when building & configuring a system. Well done Asrock!

 

[RnR_au]

7600X + AsRock mitx board + low voltage ram. And then hope that a higher voltage can get me higher. But pretty much anything in the Zen 4 sku line will be a massive improvement for me... the 8350 has done well over the years

 

[RnR_au]

Hmm found this interesting... 1 stick of DDR5 vs 2. Seems to be ~10% performance loss depending on the task.

 

[DrMrLordX]

i am interested about v-cache affecting apps like autocad, 3dsmax and photoshop. If games benefit from it that greatly, i dont see why this stuff wouldnt.

then again, what do i know as a layman.

Cache-Rich: AMD Ryzen 7 5800X3D Workstation Performance Review

First seen in its server-bound Milan-X EPYC, AMD's brought its 3D V-Cache technology to consumers with the new Ryzen 7 5800XD. With triple the L3 cache vs. the original 5800X, the right workloads could exhibit a notable performance-boost. For our first look at the 5800X3D, we're tackling our...

techgage.com

That might help you some.

 

[inf64]

If you look at "global situation", nothing can be cheaper especially when TSMC 5nm is a lot more expensive.

If you want cheep platform/gaming platform, long-lived AM4 is still alive or no problem.

For now new AM5 platform is less important for AMD, especially when you see what is happening on server/HPC CPU market=Intel has sunk.

You have to be realistic, Intel is in big trouble no doubt.

I'm speaking as a potential customer. There is no excuse for AMD to ask that much money if they are not competitive in that price bracket. If the performance is not there, there will be no way to justify the price, especially when you count in the early adopter tax for the new board and DDR5 memory.

Customers do not care about the production cost, they care about performance/$.

 

[Det0x]

green a-die on its way from china


If everything goes according to plan, this should be unlocked PMIC


Review can be found here:

Next generation DDR5 ICs Review: SK hynix 16 Gbit A-Die - 2x 16 GB with overclocking and gaming | igor´sLAB

Today I have a glimpse into the near future of RAM technology for you, and as is so often the case in the computer hardware industry, it comes from China, where SK Hynix’s new DDR5 memory ICs are…

www.igorslab.de

 

[Markfw]

Why are you building 2 systems? The really interesting CPU for AM5 comes next year, this one is just tweaked ZEN 3 on a new process.

First, I can. Second, I will be comparing high end air to AIO. 3rd, why do you want to know ?

 

[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.

 

[igor_kavinski]

The 6600 I bought too long ago to return, so I will have to sell that, but at a loss.

Or you could keep it. A future BIOS update may improve compatibility.

 

[Det0x]

So i have finally 100% dialed in my memory settings... In the end i landed on 6200MT/s @ 28-36-36-28 with tweaked subs and FCLK at 2200mhz. (y)

There is alot of stuff going on in screenshot below, so i will break it up alittle


Memory performance benchmarks:


Full screenshot including the following completed stresstests:

• TestMem5 with 1usmus CFG = 25 cycles -> 1 hour and 57mins
• Karhu ram test = 4750% -> 2 hours
• Dram calculator testmem = 400 minutes = almost 7 hours
• And lastly almost 2.5hours y-cruncher with all tests enabled, updated version with latest AVX512 support for Zen4 (hardest benchmark there is for Zen4)

Time to update to newest beta bios and do it all again

 

[gdansk]

Here's to hoping Geekbench 6 removes crypto score.

 

[igor_kavinski]

And they should have kept it hidden from spec sheets because dozens of listings now say they're selling DDR5 ECC. But the module only has 8 memory chips... lol

Yeah. Engineers suck at marketing.

 

[DrMrLordX]

My question is, why are they so desperate to get rid of their stock? Something is not right. A processor this good shouldn't be selling this low not two months after launch.

Recessions hurt. Raphael and Raptor Lake are both feeling the sting. Plus Intel cut their margins on Raptor Lake and released at compelling price points.

 

[Chaotic42]

I also got a score of 116. Just upgraded to the new ROG X670E BIOS, 0805. Hopefully nothing explodes. Fortunately I remembered to disable wifi and bluetooth to keep the evil systemd at bay.

 

[JM Popaleetus]

Figured out what was causing my instability. Wasn't PBO2, EXPO, or anything literally hardware. Simply just version F8c of the BIOS for my X670E AORUS Master. Rolling back to F8b solved all my issues. Huge shoutout to MrHugelberg over on the TweakTown/GIGABYTE forums for having the same issue and posting about it.

 

[DisEnchantment]

ComboAM5PI 1.0.0.4 is out for some ASUS mobos (beta tho)

Any Guinea pigs? 😋

I flashed it on my MSI Carbon WiFi X670E

MPG X670E CARBON WIFI

Offering colorful customization with Mystic Light, tuned for better performance by 18 Duet Rail Power System, DDR5 memory with Memory Boost, Lightning Gen5 M.2 & PCIe, Premium Thermal Solution, Screwless M.2 Shield Frozr, Wi-Fi 6E, USB 3.2 Gen 2x2

www.msi.com

I ran GB again to see if there are any clock regressions or something, seems OK
Got this result at stock.

Micro-Star International Co., Ltd. MS-7D70 - Geekbench

Benchmark results for a Micro-Star International Co., Ltd. MS-7D70 with an AMD Ryzen 9 7950X processor.

browser.geekbench.com

Quite frustrating, no change logs. Nothing.
I noticed some warnings in the Linux boot up logs disappeared. But I forgot what they were.

 

[Det0x]

Will need some time to fully stabilize this, but finally broke 100k mb/s writespeed
FCLK @ 2200mhz
MCLK @ 6600MT/s

 

[AdamK47]

Why not buy at the current sale price and activate anew?

I'm not throwing any more money on a suspect memory benchmark.

 

[Timmah!]

Well, when mine gets blacklisted I'll PM you I hope you reserve one for that day.


Look above, his 7950X can do 6065 MHz.

I will give mine a shot.

I demand a step-by-step tutorial how to achieve that

Merry Christmas everyone!