[tzjj]

Did anyone on here tried to undervolt their 7800x3D with turbo boost being disabled and a flat core offset, so no PBO, for pure gaming and getting as power efficient as possible? if so, how far did you go and how far could you lower the power usage?

 

[litchking84]

Did anyone on here tried to undervolt their 7800x3D with turbo boost being disabled and a flat core offset, so no PBO, for pure gaming and getting as power efficient as possible? if so, how far did you go and how far could you lower the power usage?

I don't see why you would want to do this. The whole point of getting a 7800X3D is to get the max performance possible while gaming. I run my 7800X3D with PBO and all core offset of -30 and temp limit of 85c and it runs perfectly.

 

[KickAssCop]

Built this system. Specs in sig. Practically 0 difference in performance in games compared to my 5800X3D system at 4K. Dope.

 

[alasdairvfr]

Built this system. Specs in sig. Practically 0 difference in performance in games compared to my 5800X3D system at 4K. Dope.

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The jump from a 5800x3d to 7800x3d would be less pronounced than from a regular 5000 chip. You have a 10-15% more IPC single core going 7000, but the 3dcache gain from 5-7000 won't really change much. That being said, new platform, DDR5 ram, you went from the APEX sunset system to having a ton of possibility in front of you.

I'm pretty sure I have the same memory kit as you, can tighten timings a whole lot from EXPO, and make sure to set your mclk=uclk

 

[KickAssCop]

The jump from a 5800x3d to 7800x3d would be less pronounced than from a regular 5000 chip. You have a 10-15% more IPC single core going 7000, but the 3dcache gain from 5-7000 won't really change much. That being said, new platform, DDR5 ram, you went from the APEX sunset system to having a ton of possibility in front of you.

I'm pretty sure I have the same memory kit as you, can tighten timings a whole lot from EXPO, and make sure to set your mclk=uclk

Yup no complaints from my side. Do you have timings that you can share. Would love to try them out. MCLK=UCLK is something I will check as well.

 

[tzjj]

I don't see why you would want to do this. The whole point of getting a 7800X3D is to get the max performance possible while gaming. I run my 7800X3D with PBO and all core offset of -30 and temp limit of 85c and it runs perfectly.

There is a reason for what I asked. PBO doesnt undervolt it also boosts at the same time, meaning same power draw. For me, the point of using a 7800X3D is its amazing power efficiency. Most people dont understand power efficiency and just want overclock and get the most performance. For me and some other people I want to get the lowest power usage out of a new system as possible, at the same time of have stable FPS and achieve a FPS limit cap I want.

Easy example:

The 7800X3D boosts for no reason in most games even if you cap FPS to 60 and uses 50 - 65W for no reason. I noticed this now in a few games. If you disable turbo boost, the game still delivers stable 60FPS, but the CPU package power goes down to 40W, dramatic power saved, CPU runs 20°C cooler, less fan noise.

For me overclocking works the other way around. I want to get as low power a system can use, with it still being stable and give the FPS I want.

So anyone who did the same for their 7800X3D disabling turbo in games, no PBO and just use a flat undervolt offset. What undervolt did you use for a flat offset with turbo disabled in games?

 

[HappySheep]

@Hendrickson did you manage to find th culprit?

 

[litchking84]

There is a reason for what I asked. PBO doesnt undervolt it also boosts at the same time, meaning same power draw. For me, the point of using a 7800X3D is its amazing power efficiency. Most people dont understand power efficiency and just want overclock and get the most performance. For me and some other people I want to get the lowest power usage out of a new system as possible, at the same time of have stable FPS and achieve a FPS limit cap I want.

Easy example:

The 7800X3D boosts for no reason in most games even if you cap FPS to 60 and uses 50 - 65W for no reason. I noticed this now in a few games. If you disable turbo boost, the game still delivers stable 60FPS, but the CPU package power goes down to 40W, dramatic power saved, CPU runs 20°C cooler, less fan noise.

For me overclocking works the other way around. I want to get as low power a system can use, with it still being stable and give the FPS I want.

So anyone who did the same for their 7800X3D disabling turbo in games, no PBO and just use a flat undervolt offset. What undervolt did you use for a flat offset with turbo disabled in games?

Out of interest, did you install the 3D V-Cache driver in windows and leave it set to 'AUTO' under CPPC in the BIOS? Not sure if it makes a difference but maybe try switching to 'prefer cache' in BIOS and deleting the the 3D V-Cache driver in Windows.

 

[Yuke]

Any 2 CCD Zen 4 owner who tested if you can force both CCDs in Starfield? Looking at how good it scales with E-Cores on Intel I'm wondering if you could do the same on Zen 4.

Even the 7950X without V-Cache only loads up 1 CCD from what I saw so far.

 

[Kelutrel]

Out of interest, did you install the 3D V-Cache driver in windows and leave it set to 'AUTO' under CPPC in the BIOS? Not sure if it makes a difference but maybe try switching to 'prefer cache' in BIOS and deleting the the 3D V-Cache driver in Windows.

I just tried this on the latest Win11 version, setting CPPC Cache in the BIOS and uninstalling the AMD 3D Cache Optimization driver, and on my hardware it made no difference compared to having CPPC Auto or Driver and the AMD 3D Cache Optimization driver enabled. Actually, there was a 0.2-0.5% decrease in games and benchmarks, but it may just be random variation.
I wonder why I keep that driver then ...

Note that if I also uninstall the PPM driver then I start to get, on my hardware and config, a more conspicuous 4-5% performance decrease.

UPDATE:
Without the AMD 3D Cache Optimization driver I get worse performances in certain benchmarks, mostly single core ones like Linpack or Geekbench 6 ST, so I am back with the 3D optimizer driver just for the sake of benchmark consistency.

 

[BlueShark]

On my 7950X3D to force both CCDs to be used as normal I just go to the power plan and change from balanced to high performance and that’s it, in spiderman I get an extra 10fps doing this.

 

[Yuke]

On my 7950X3D to force both CCDs to be used as normal I just go to the power plan and change from balanced to high performance and that’s it, in spiderman I get an extra 10fps doing this.

damn, wondering what the improvements in Starfield would be.

 

[BlueShark]

damn, wondering what the improvements in Starfield would be.

I haven’t got around to playing it yet, only tested right at the beginning of the game, but did not test using both CCDs, will test latter, but I was taken back how bad it was on my RTX 4090, all the talk about it being unoptimized, no kidding.

 

[Yuke]

I haven’t got around to playing it yet, only tested right at the beginning of the game, but did not test using both CCDs, will test latter, but I was taken back how bad it was on my RTX 4090, all the talk about it being unoptimized, no kidding.

Yeah, best you can hope for is like 97% load on the 4090 from time to time. Would appreciate the testing. You don't have to look further than the first or second City (New Atlantis/Akila). They are both very CPU bound. Or you can just load up the save game from PCGH and press down "W" for a few seconds.

Here is the Video and Save Game of the run:

Starfield: 24 CPU-Benchmarks - Welcher Prozessor reicht aus?

Starfield ist da und PCGH prüft mit CPU-Benchmarks, welche Anforderungen das Spiel an den Prozessor stellt.

www.pcgameshardware.de

 

[BlueShark]

Yeah, best you can hope for is like 97% load on the 4090 from time to time. Would appreciate the testing. You don't have to look further than the first or second City (New Atlantis/Akila). They are both very CPU bound. Or you can just load up the save game from PCGH and press down "W" for a few seconds.

Here is the Video and Save Game of the run:

Starfield: 24 CPU-Benchmarks - Welcher Prozessor reicht aus?

Starfield ist da und PCGH prüft mit CPU-Benchmarks, welche Anforderungen das Spiel an den Prozessor stellt.

www.pcgameshardware.de

I will download a save file and test latter and I will let you know.

 

[BlueShark]

Yeah, best you can hope for is like 97% load on the 4090 from time to time. Would appreciate the testing. You don't have to look further than the first or second City (New Atlantis/Akila). They are both very CPU bound. Or you can just load up the save game from PCGH and press down "W" for a few seconds.

Here is the Video and Save Game of the run:

Starfield: 24 CPU-Benchmarks - Welcher Prozessor reicht aus?

Starfield ist da und PCGH prüft mit CPU-Benchmarks, welche Anforderungen das Spiel an den Prozessor stellt.

www.pcgameshardware.de

Tested starfield, but I had to convert the save file from stream to game pass format, after that, I tested with fsr2 on 50% to become CPU bound and walking up and down the road or street it hovered around 100fps to min 88fps, on high performance mode all cores activated and same part 104fps min 91fps, not night and day just a slight bump.

Just standing there looking down the road and with balanced it was dipping to 88fps to high 100fps, with high performance mode it never went lower than 96fps but stayed mainly at 104fps.

I don’t have any curve optimizer on or anything else as I am tunning my memory, but strange how these games seem to respond to more cores now, would like to see what a 7950X non 3D CPU got in the same place.

 

[Yuke]

Tested starfield, but I had to convert the save file from stream to game pass format, after that, I tested with fsr2 on 50% to become CPU bound and walking up and down the road or street it hovered around 100fps to min 88fps, on high performance mode all cores activated and same part 104fps min 91fps, not night and day just a slight bump.

Just standing there looking down the road and with balanced it was dipping to 88fps to high 100fps, with high performance mode it never went lower than 96fps but stayed mainly at 104fps.

I don’t have any curve optimizer on or anything else as I am tunning my memory, but strange how these games seem to respond to more cores now, would like to see what a 7950X non 3D CPU got in the same place.

alright, thanks. If you know how to use MSI-Afterburner you could bench it for more accurate numbers but guess it makes sense to see an increase. The PCGH benchmark is at 720p so changes in fps are more pronounced.

 

[Justye95]

Hi everyone, for Ryzen 7950x3D owners I have a "problem"
Does the CPU ever drop below 41 degrees when idle?
I have a dual pump Mo-Ra but any cooling I use while idle never gets below 41 degrees. on Cinebench R23 however the CPU reaches a maximum of 78 degrees with 38k points. The CPU is set with negative curve optimizer.
CPU IOD HOTSPOT is always above 40 degrees at idle.
I had the 7950x before and it went below 40 degrees.
I have manual RAM tuning and out of curiosity I tried lowering the vsoc to 1v and the ram to 4800mhz. what am I doing wrong? Is it like this for you too?

 

[Kelutrel]

Hi everyone, for Ryzen 7950x3D owners I have a "problem"
Does the CPU ever drop below 41 degrees when idle?
I have a dual pump Mo-Ra but any cooling I use while idle never gets below 41 degrees. on Cinebench R23 however the CPU reaches a maximum of 78 degrees with 38k points. The CPU is set with negative curve optimizer.
CPU IOD HOTSPOT is always above 40 degrees at idle.
I had the 7950x before and it went below 40 degrees.
I have manual RAM tuning and out of curiosity I tried lowering the vsoc to 1v and the ram to 4800mhz. what am I doing wrong? Is it like this for you too?

My CPU IOD HOTSPOT on HwINFO is around 36.8° if I let it idle at this time. I have a beQuiet Silent Loop 2 360 and use Prolimatech PK3 Nano as thermal paste. The current room temperature is 22°.

 

[Justye95]

My CPU IOD HOTSPOT on HwINFO is around 36.8° if I let it idle at this time. I have a beQuiet Silent Loop 2 360 and use Prolimatech PK3 Nano as thermal paste. The current room temperature is 22°.

the temperature of my room is around 27/28 degrees, and the temperature of the liquid is 28 degrees as soon as I turn on the PC