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)

 

[scineram]

Or save yourself all trouble with Windows 10.

 

[alexruiz]

What's your Expo, 6000/CL36?

I tried 2 different sets
6000/CL30 and 6000/CL36
I did not try a 5600/CL36 set.

Both of the 6000 would not even post with EXPO enabled

 

[lopri]

That is disconcerting. I have yet to start my build.

 

[Saylick]

Some motherboards have newer UEFIs updating the comboAM5 AGESA from 1.0.0.3A to 1.0.0.3D

I tried UEFI F7a for Gigabyte X670 Aorus Elite AX.
It cannot even POST after enabling EXPO.
Flashback to F6c

I might try the one for the B650 Aorus elite AX, but not promising based on what I saw on the X670.

I have the same mobo and was able to POST using EXPO with the F5 BIOS. This was with both the FlareX5 5600 CL36 and the 6000 CL36 memory.

 

[Saylick]

Yes, after I fire it up, I will reply as to how its working/

Supposedly it should be better than both dark rock and noctua.

Per Hardware Canucks, it's a GREAT heatsink for the money. For $50 with free shipping, it's a no brainer for all "budget" builds.

 

[Saylick]

What thermal paste is everyone using on these chips?

Noctua NT-H1. Not the best, but pretty cheap, and does the job.

For Zen 4, seeing as how the thermal flux is so high, there's not much of a difference between good paste and top-of-the-line paste. It isn't worth spending $30 in my opinion on Cryonaut or liquid metal, seeing as that the thicker IHS allegedly poses a bottleneck anyways. You might eek out 50 MHz higher all-core boost clocks or something with more exotic TIMs, I believe. Your time is better spent optimizing an undervolt, and you can set a lower thermal limit if you would like the processor to top out at a lower temperature with negligible loss in performance.

 

[Markfw]

Per Hardware Canucks, it's a GREAT heatsink for the money. For $50 with free shipping, it's a no brainer for all "budget" builds.

View attachment 72000

View attachment 72001

View attachment 72002

Sorry, yes, its been running 24/7@100%. Same frequency as the $90 cooler and preset 85c max. Benchmark (run times on my tasks) about the same, task times very. I could show youthe chart above shows it, ak620 for $50.

 

[Markfw]

Supposedly it should be better than both dark rock and noctua.

See the post above, yes, very good for $50 (after $5 offat newegg) ak620

 

[cellarnoise]

I am using one ak620. Works great on a 5950x at 142w.

I am now using two peerless assassin 120, also. They seem as good with about the same ram clearance and case clearance for about $10 less. About same fan noise also.

About same amount of heatsink weight. Might just come down to fan efficiency, but seems about the same ...

 

[alexruiz]

I have the same mobo and was able to POST using EXPO with the F5 BIOS. This was with both the FlareX5 5600 CL36 and the 6000 CL36 memory.

View attachment 72003

Yes, F5 will post and run fine with EXPO settings
F6c will also post and run even better with EXPO settings. F6c is AGESA 1.0.0.3A, and in my opinion, the one to have right now.
Unfortunately, it has been pulled from Gigabyte's website.

F7a with AGESA 1.0.0.3D is the one that doesn't even post with EXPO settings, also Flare X5 RAM (DDR5-6000 CL30 and DDR5-6000 CL36. I did NOT try DDR5-5600 CL36)

 

[Saylick]

Yes, F5 will post and run fine with EXPO settings
F6c will also post and run even better with EXPO settings. F6c is AGESA 1.0.0.3A, and in my opinion, the one to have right now.
Unfortunately, it has been pulled from Gigabyte's website.

F7a with AGESA 1.0.0.3D is the one that doesn't even post with EXPO settings, also Flare X5 RAM (DDR5-6000 CL30 and DDR5-6000 CL36. I did NOT try DDR5-5600 CL36)

Thanks, good to know. I am personally waiting for the next non-beta BIOS version that fixes the sleep state issue. Hopefully, that will come out within a month or two.

 

[JM Popaleetus]

Having some annoying early adopter pains, which I think might come down to my 7700X's IMC. Something is causing instability to the point where it's even freezing within the UEFI.

Does anyone know yet what these two settings actually do?

• Low Latency Mode
• High Bandwidth Mode

 

[Markfw]

Having some annoying early adopter pains, which I think might come down to my 7700X's IMC. Something is causing instability to the point where it's even freezing within the UEFI.

Does anyone know yet what these two settings actually do?

• Low Latency Mode
• High Bandwidth Mode

First question. Does it work at bios defaults ?

Second, if you changed things, do you have EXPO memory, and it it set to that ?

 

[JM Popaleetus]

First question. Does it work at bios defaults ?

Second, if you changed things, do you have EXPO memory, and it it set to that ?

Yes works 100% at defaults.

As for EXPO, yes it's set to that. But I'm trying to determine (which next troubleshooting step is to start A/Bing settings) if it's maybe one of those two settings causing the freezing and BSODing.

EDIT: It might also be PBO2. Disabling that is another thing I need to try A/Bing.

 

[Markfw]

Yes works 100% at defaults.

As for EXPO, yes it's set to that. But I'm trying to determine (which next troubleshooting step is to start A/Bing settings) if it's maybe one of those two settings causing the freezing and BSODing.

Is the memory EXPO rated ???? If not whats is the memory and the settings ? From my experience if its expo memory and set to that great, otherwise its a a crap
shoot.

 

[JM Popaleetus]

Is the memory EXPO rated ???? If not whats is the memory and the settings ? From my experience if its expo memory and set to that great, otherwise its a a crap
shoot.

Yes. The memory is EXPO rated at DDR5-6000 CL30; I'm confident it's not the memory itself that's the issue. Which is why I asked if anyone has any idea what those two settings do,

Are they changing timings? Can they be run together? I'm seeking a more technical answer.

Googling yields nothing other than their existence.

 

[Chaotic42]

Interesting video on AM5 and 128GB of RAM via 4 DIMMs. In short: Just don't unless you love DDR-3600

 

[Markfw]

Yes. The memory is EXPO rated at DDR5-6000 CL30; I'm confident it's not the memory itself that's the issue. Which is why I asked if anyone has any idea what those two settings do,

Are they changing timings? Can they be run together? I'm seeking a more technical answer.

Googling yields nothing other than their existence.

Sorry, I really can't be of more help now. When I set EXPO to rated settings, all my problems went away, and I don't know what those 2 settings do.

Edit. Not that this has anything to do with your problem, but I set my PBO to CO, negative offset, -25, and then max temp to 85c.

 

[Det0x]

Binning continues, still no good sample ;(
Two last ones are "made in china", all others are "made in Malaysia"

LLC 5, L3 idle temp ~20 degrees, max load ~60 temp (~185w PPT with 6000/2000 memory)
1200mv vcore set, ~1110mv get under load

Maximum stable 3x in a row Cinebench r23 allcore clocks:
7950x SP 115 (SP 120 + SP 110) = 5400/5300mhz
7950x SP 117 (SP 121 + SP 112) = 5500/5200mhz
7950x SP 116 (SP 119 + SP 114) = 5450/5350mhz
7950x SP 116 (SP 120 + SP 111) = 5425/5325mhz
7950x SP 115 (SP 119 + SP 110) = 5425/5275mhz
7950x SP 114 (SP 121 + SP 108) = 5450/5250mhz (with L0 cache error)

 

[Det0x]

Does anyone know yet what these two settings actually do?

• Low Latency Mode
• High Bandwidth Mode

I responded to you in a other forum, but the short version for everyone over here:

The tweak is based on increasing tREF, which is basically the oldest trick in the book. Increasing tREF essentially increases the efficiency as the refresh occur less frequently.

 

[eek2121]

I know this is probably a brief reading error, but still funny:



Apparently my Core 0 has super powers and can clock to almost 9 ghz 🤣

 

[AdamK47]

Binning continues, still no good sample ;(
Two last ones are "made in china", all others are "made in Malaysia"

LLC 5, L3 idle temp ~20 degrees, max load ~60 temp (~185w PPT with 6000/2000 memory)
1200mv vcore set, ~1110mv get under load

Maximum stable 3x in a row Cinebench r23 allcore clocks:
7950x SP 115 (SP 120 + SP 110) = 5400/5300mhz
7950x SP 117 (SP 121 + SP 112) = 5500/5200mhz
7950x SP 116 (SP 119 + SP 114) = 5450/5350mhz
7950x SP 116 (SP 120 + SP 111) = 5425/5325mhz
7950x SP 115 (SP 119 + SP 110) = 5425/5275mhz
7950x SP 114 (SP 121 + SP 108) = 5450/5250mhz (with L0 cache error)

An easier path for you and your money to obtain better CPU performance and far better memory performance is getting a 13900K CPU, Z790 motherboard, and DDR5 7600 memory.

 

[JM Popaleetus]

I responded to you in a other forum, but the short version for everyone over here:

The tweak is based on increasing tREF, which is basically the oldest trick in the book. Increasing tREF essentially increases the efficiency as the refresh occur less frequently.

Much obliged!

 

[scineram]

Interesting video on AM5 and 128GB of RAM via 4 DIMMs. In short: Just don't unless you love DDR-3600

I think AMD really shot themselves in the foot by having only 2 memory controllers for desktop and also promising platform longevity.

 

[biostud]

I think AMD really shot themselves in the foot by having only 2 memory controllers for desktop and also promising platform longevity.

Not with speeds that DDR5 will be capable of in the future and with the vcache Zen models. But it does seem like Intel has better memory controllers, so AMD has room for improvement with zen5.