Question Zen 4 builders thread

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AdamK47

Lifer
Oct 9, 1999
15,305
2,911
126
The MSI Gaming Trio 4090 you see in my photo is pretty solid. Manufacturers have figured out that they can add bracing on the rear of the card on the IO side where it pushes against the case. The card may look slanted in the photo, but it's straight. The plastic shroud design flares out towards the front of the case making it appear sloped.

This 4090 is a bit larger compared to the EVGA 3090Ti FTW3 Ultra I had prior. 337mm vs 300mm length and 140mm vs 137mm width.
 

crisium

Platinum Member
Aug 19, 2001
2,643
615
136
After -30 on the voltage and 105W limit being stable on my 7700X (giving me the performance of stock at 135W+ based on reviews), I'm gonna get greedier and try -35 and 100W which also gives stock performance.

Cinebench and Furmark CPU tester have been stable so far. Anything else free and easy that's good for testing undervolts?
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
25,736
14,767
136
Zen 4, at least the 7950x is $600 on ebay from antonline. I could not resist, and have 7950x number 3 incoming next week. This build is for the computer I am typing on. I need something a little faster for my main machine. I will reuse the 240 AIO, the case and PSU and all drives. It will not be as fast as my other 2, but faster than the 5950x it will replace. I will set it to CO -25 like the others, but down to 80c on the max temp. The other 2 are 85 and 90.
 

repoman0

Diamond Member
Jun 17, 2010
4,528
3,441
136
After -30 on the voltage and 105W limit being stable on my 7700X (giving me the performance of stock at 135W+ based on reviews), I'm gonna get greedier and try -35 and 100W which also gives stock performance.

Cinebench and Furmark CPU tester have been stable so far. Anything else free and easy that's good for testing undervolts?

Corecycler with ycruncher is the way. My 7900X and 7950X were also stable at -30, haven’t tried lower yet.
 

A///

Diamond Member
Feb 24, 2017
4,352
3,155
136
Zen 4, at least the 7950x is $600 on ebay from antonline. I could not resist, and have 7950x number 3 incoming next week. This build is for the computer I am typing on. I need something a little faster for my main machine. I will reuse the 240 AIO, the case and PSU and all drives. It will not be as fast as my other 2, but faster than the 5950x it will replace. I will set it to CO -25 like the others, but down to 80c on the max temp. The other 2 are 85 and 90.
I've seen antononline on ebay before but not sure if they're reputable? I buy a lot of crap from ebay so i have not got a leg to stand on here. I can make a long drive out to a store that can give me a deal if one exists. The only confusion I have with am5 is ram speed and motherboard choices. it's a sensory overload given the numerous options. it used to be there were three or four main mobos you wanted with the pricier and feature rich stuff separate for the big sharks who wanted to waste their money or so it seemed. and before that the frantic 10x checking of your connections and jumpers praying you don't fry your very expensive new hardware. Of course how could one forget those days where ribbon cables were cheap long and plentiful so you'd knock back a few drinks and wrap your head in a few of those cables with some peeky space for your eyes and pretend you were a mummy a tech mummy back from the dead, double points if it was on or near halloween otherwise you were considered a massive wrong'un by your neighbors, outside of computers being a niche hobby at the time.
 
Reactions: igor_kavinski

In2Photos

Golden Member
Mar 21, 2007
1,663
1,682
136
After -30 on the voltage and 105W limit being stable on my 7700X (giving me the performance of stock at 135W+ based on reviews), I'm gonna get greedier and try -35 and 100W which also gives stock performance.

Cinebench and Furmark CPU tester have been stable so far. Anything else free and easy that's good for testing undervolts?
I thought -30 was as far as you could go. What is the limit?
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
25,736
14,767
136
I've seen antononline on ebay before but not sure if they're reputable? I buy a lot of crap from ebay so i have not got a leg to stand on here. I can make a long drive out to a store that can give me a deal if one exists. The only confusion I have with am5 is ram speed and motherboard choices. it's a sensory overload given the numerous options. it used to be there were three or four main mobos you wanted with the pricier and feature rich stuff separate for the big sharks who wanted to waste their money or so it seemed. and before that the frantic 10x checking of your connections and jumpers praying you don't fry your very expensive new hardware. Of course how could one forget those days where ribbon cables were cheap long and plentiful so you'd knock back a few drinks and wrap your head in a few of those cables with some peeky space for your eyes and pretend you were a mummy a tech mummy back from the dead, double points if it was on or near halloween otherwise you were considered a massive wrong'un by your neighbors, outside of computers being a niche hobby at the time.
I have bought quite a bit from them.
 

crisium

Platinum Member
Aug 19, 2001
2,643
615
136
I thought -30 was as far as you could go. What is the limit?

Oh I don't know what the limit is. I think I'm actually getting it because my frequency is a tad higher in Cinebench then when I did 100W with -30. Or maybe I'm seeing what I want to see. Either way, who knows if it is stable yet.
 
Jul 27, 2020
17,740
11,527
106
Of course how could one forget those days where ribbon cables were cheap long and plentiful so you'd knock back a few drinks and wrap your head in a few of those cables with some peeky space for your eyes and pretend you were a mummy a tech mummy back from the dead, double points if it was on or near halloween otherwise you were considered a massive wrong'un by your neighbors, outside of computers being a niche hobby at the time.
Yep. You are drunk alright.

 
Jul 27, 2020
17,740
11,527
106
I'm about to pick up another open box 7950X from Microcenter for $630, along with the free 32GB DDR5-6000 The antonline deal is great but more free RAM is pretty sweet. And the new deal is CL30 so probably Hynix rather than peasant Samsung.
I feel like a peasant for not being near a Microcenter (first I would need to migrate to US, though).
 

Det0x

Golden Member
Sep 11, 2014
1,053
3,078
136
I thought -30 was as far as you could go. What is the limit?
Theoretical minimum PBO CO limit with Zen4 is -200 i believe.(can basically reduce CO unlimited until system don't boot anymore)
With Zen3 its -30.

On my 7950x with one good CCD and one bad i'm running these values:


Which gives me these scores with 24/7 settings


Its pretty much CCD0 that's carrying the benchmark scores.. my CCD1 is so bad that i even need a positive CO value on core13.. Clockspeeds look like this when running Cinebench R23
CCD0 = ~5456mhz
CCD1 = ~5181mhz
 

Det0x

Golden Member
Sep 11, 2014
1,053
3,078
136
How do you use Ryzen Master to test for bad (preferred?) cores?
I'm using CoreCycler to manually find my PBO CO values.. Have been working on my current set for ~5 days now.


Newest version can be found here:
 

crisium

Platinum Member
Aug 19, 2001
2,643
615
136
I did one iteration of Core cycler without any issues earlier today actually cause repoman0 mentioned it. I don't know what you mean by manually, but I'll keep running it and hopefully it keeps passing.
 

A///

Diamond Member
Feb 24, 2017
4,352
3,155
136
Still waiting for some sample builds. The furthest I got was case choices.

What made you start?

Hope it's not to drown some sorrow(s) coz your liver will drown too.
Oh no, I never liked the taste of the hard stuff because as a child I'd sneak finger licks from the adults glasses. This was long before the internet was remotely available and dial up may have well been a foreign idea to most. We kids got our jollies in other ways like that or lighting up someone's mailbox with cheap fireworks LOL
 

repoman0

Diamond Member
Jun 17, 2010
4,528
3,441
136
One iteration of Corecycler/ycruncher complete at -40 CO on my 7950X. Hadn't really even considered trying that low until recently since Zen 3 maxed out at -30. Lots of room in the v/f curve on this initial batch of chips it seems. I don't have any PBO boost clock increase enabled though, it's hitting 5725 MHz single core which is good enough for me.

My early batch 5900X couldn't even do -10 ...

edit: -40 locked up eventually. Too lazy to figure out what core it was so -30 it is.
 
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