Anyway to have 7800x3D locked to 5050Mhz when gaming?

[S2G-Unit]

I just changed my CPU from a 7700x with a locked all core overclock to a 7800x3D. I know the X3D's have been limited in some ways for protection of voltage, temps etc.

When gaming, just as when running Cinebench R23 single core test. Only 1-3 cores go to 5050mhz with a single core score of 1814. Obviously, when checking in Cinebench doing a multicore test, the CPU has all cores locked to 5050mhz with a score of 18726.

Re ran the benchmarks in the same 4 games that I did before switching CPU's & my .1% & 1% lows are actually worse.

So I'm thinking, just like with my 3080, by far my best performance, most stable frametimes & highest .1% lows came when the voltage & clocks were locked. Seems like it must be the same with the x3D's. I'm getting worse .1% lows because not all the cores stay locked to 5050mhz.
Is there anyway to force all cores to lock to 4800-5050Mhz while gaming?

*edit* Even with PBO2 &CO at -10 to about -30.
Temps when gaming are around 50C.

Disable SMT? Change power plans in Windows? Process Lasso??

Clock speeds verified by MSI Afterburner & HWInfo64

 

[freeagent]

As an X3D owner you get to enjoy a Dell like life with no overclocking allowed.

 

[Gucky]

When a CPU doesn't hit max frequency on all cores, then it reaches an other limit first.
There are several limits: Clockspeed, temperature, voltage, power.

I don't own a 7800X3D, but I can speak from my experience with my 5800X3D.
Before the bios update that unlocked it, I used a thirdparty tool (PBO Tuner2) to enable PBO Curve Optimizer and used +30 on all cores. Doing that increased my average clockspeed by 200Mhz from 4,22Ghz to the max 4.42Ghz, while powerconsumption and temperatures stayed the same.
In that case I lowered the voltages with CO to lower temps and power consumption, I probably hit the powerlimit first.

And not all CPUs are equal, there is something called binning. My 5800X3D can run CO with -30 on all cores, others might not. others might hit the 4.42Ghz without the CO.

 

[SL2]

Dunno if this is of any help.

SkatterBencher #60: AMD Ryzen 7 7800X3D Overclocked to 5400 MHz - SkatterBencher

We overclock the AMD Ryzen 7 7800X3D up to 5400 MHz with the ASUS ROG Crosshair X670E Hero motherboard and EK-Quantum water cooling.

skatterbencher.com

 

[Chrispy_]

Going from an overclocked 7700X to a 7800X3D is mostly a sidegrade, but I would expect your 0.1% lows to increase at least. What are you memory speeds (primary and secondary), what is your FCLK:MCLK ration, how many sticks, how many ranks per stick, which memory topology is your motherboard?

On the assumption you don't have a RAM timings problem and your RAM is configured optimally, I'd shove a blank drive in there and do a fresh OS install on the latest motherboard BIOS update and the latest AMD chipset drivers first, just to confirm it's not an issue with an older BIOS or polluted OS.

 

[dgianstefani]

Fresh install. Disabling SMT will lower latency but decrease FPS. There's not much you can do to tune it besides improving cooling and reducing voltage. A delid could help, since temperature limit is 6 C lower than 7700X.

 

[S2G-Unit]

Going from an overclocked 7700X to a 7800X3D is mostly a sidegrade, but I would expect your 0.1% lows to increase at least. What are you memory speeds (primary and secondary), what is your FCLK:MCLK ration, how many sticks, how many ranks per stick, which memory topology is your motherboard?

On the assumption you don't have a RAM timings problem and your RAM is configured optimally, I'd shove a blank drive in there and do a fresh OS install on the latest motherboard BIOS update and the latest AMD chipset drivers first, just to confirm it's not an issue with an older BIOS or polluted OS.

I was planning on a fresh install even though this install is only 3 months old & backed up with Macrium reflect.

I noticed something with Windows power plans. I'm using a custom power plan, one that gave me the best .1% & 1% lows. I've tested some other power plans but even one custom power plan that had all cores always from 4800-5050mhz was not actually better. The .1% lows were not as good as the power plan I had when I installed the new CPU.

I'll have to redo my ram timings & tests & see.

I added some info below.

But FCLK=MCLK at 2000 or 2100mhz seems fine.
I have 2x16gb 6400 ram, timings have been tightened & compared with oc.net but I'll recheck my timings & re test once more.

 

[dgianstefani]

Fill out your system specs.

 

[dont whant to set it"']

As an X3D owner you get to enjoy a Dell like life with no overclocking allowed.

Unless one has a motherboard with an external bclk generator.

 

[JrRacinFan]

Unless one has a motherboard with an external bclk generator.

Do you know of any AM5 motherboards that have one? I'm going to do some searching ....

edit:
So far Ive found that AsRock B650E & x670e Taichi boards do have them. Can't find any others.

 

[freeagent]

Unless one has a motherboard with an external bclk generator.

Generally you are going to pay a little extra for something like that

 

[S2G-Unit]

Unless one has a motherboard with an external bclk generator.

Doing some research I saw SkatterBencher on youtube used an eCLK to overclock the x3d's higher.

Does anybody know if using eCLK allows use to lock an all core overclock without the fluctuating clockspeeds?

 

[dont whant to set it"']

My mbs are equipped with eCLK generators but I got no 7000X3D to play with and test it out.

I cant simply lock my 5800X3D to whatever freq above 44.5X 34x CPU multi. in bios. 44.5X is the maxim value at witch it powers up , posts, loads os; any value above that leads to not completing PowerOnSelfTest.

As , above , the 5800X3D can boost above 4.45GHz up to 4.55GHz at 100MHz base clock(unaltered). The cpu and motherboard do there thing and so there is that.
The values and figures for the 7800X3D are unknown to me.

Any one in UK willing to temporary swap CPUs with me, ya know, LAN OC party maybe ?
I could buy one , test it , send it back for a full refund within the return period.

le: Base frequency for the 5800X3D is 3400MHz, lockable, above that its all boosting.
Base frequency for the 7800X3D is 4200Mhz, lockable, above that it is all boosting algorithms.

 

[Awwwyeahhhbaby]

I am running a 7800X3D on a MSI 670E ACE , 1.81 BIOS, DDR56000 yadda yadda and using the PBO preset "Enahnced Mode 3" gives me a very stable 5050mhz core speed on most applications. In order to "lock" the speed you have to manually alter stuff like Skatterbencher shows and you gain like 1-2% aside a few extreme examples. Kind of the same with most overclocks on 7000 series, it's crap and a solid PBO is nearly the same on 99% of applications, the real difference is on synthetic tests but otherwise overclocking is pretty useless.

EDIT: I should add I also overclocked this CPU to 5200mhz for some 3dMark runs (same user name if you look me up), got a little better scores there but again, that's synthetic testing. I didn't go crazy with it, just a day of messing around because the stories about these chips and it's socket melting/warping started trickling out and I went to PBO again to save my investment.

 

[S2G-Unit]

I found this video where he was able to lock the clock speed on his 7800x3D.

For me, with my 1080ti & 3080, I got a significant improvement in .1% lows by locking clock speeds. Way more than just 1-2% improvement. I think there is quite a bit of performance to to get with a locked 5050mhz + clock speed all cores when gaming.

 

[Chrispy_]

I found this video where he was able to lock the clock speed on his 7800x3D.

For me, with my 1080ti & 3080, I got a significant improvement in .1% lows by locking clock speeds. Way more than just 1-2% improvement. I think there is quite a bit of performance to to get with a locked 5050mhz + clock speed all cores when gaming.

Cool.

Just because you can overclock it, doesn't mean you should.
Check all the articles trending right now about Zen4 X3D chips being burned because motherboard vendors are exposing overclocking options for overclocking a CPU that AMD explicitly said, multiple times, should never be overclocked.

 

[S2G-Unit]

Fill out your system specs.

RTX 3080
Optane 905P
G Skill 6400 DDR5 with tightened timings
Gigabyte B650 Aorus Pro AX

 

[mkdr]

Disabling SMT will lower latency but decrease FPS

In this test disabling SMT increased FPS in every single game tested on the 7800x3d, and actually a LOT, at least 10FPS more in every game.

 

[mouacyk]

Tried it on 7800X3D = random stuttering in CODMW2. Leaving SMT on for now.