Question Ryzen 9800X3D idle & gaming temps ?

[ItzEcliptikz]

Not probably, but for sure.

MSI Pro B650-P Wifi has 12 main VRM phases rated at 75A (in 12+2+1 configuration)
MSI Pro X870-P Wifi has 14 main VRM phases rated at 60A (in 14+2+1 configuration)

Definitely seems to be helping!

 

[JayGau]

I have a 9800X3D with a -15 curve optimization, and my temps are very, very similar to yours (or at least the ones you described at the beginning of the discussion). About 85c in Cinebench, around 50c in most games (can be higher for CPU demanding games like MS Flight Simulator) and idle at around 45c.

The extra cache on the chip allows it to request data from the memory much less often, which reduce the load, so the temperature. It's why it runs so cold in games, but much hotter under heavy loads like cinebench (the extra cache doesn't matter there).

And as I always say, high-end CPUs should be paired with high-end motherboards. A 9800x3d with a b650 mobo should work, but you might not get the maximum from it. Good that you got a x870.

 

[ItzEcliptikz]

I have a 9800X3D with a -15 curve optimization, and my temps are very, very similar to yours (or at least the ones you described at the beginning of the discussion). About 85c in Cinebench, around 50c in most games (can be higher for CPU demanding games like MS Flight Simulator) and idle at around 45c.

The extra cache on the chip allows it to request data from the memory much less often, which reduce the load, so the temperature. It's why it runs so cold in games, but much hotter under heavy loads like cinebench (the extra cache doesn't matter there).

And as I always say, high-end CPUs should be paired with high-end motherboards. A 9800x3d with a b650 mobo should work, but you might not get the maximum from it. Good that you got a x870.

Even without a negative curve my cpu temps are still incredibly frosty. Love this chip, and yeah, the x870-p is definitely helping.

 

[ItzEcliptikz]

Will Run cina r23 and heaven later and post results, but performance, power draw and temps in actual game testing has been amazing.

 

[JayGau]

In a nutshell - underclocking = less power consumption, less heat generation (in turn, less noise from CPU cooler), but also reduces CPU performance.

In gaming, this means less FPS, since you're essentially restricting CPU's max performance. Same with GPU underclock.

That’s absolutely not how curve optimizer works. It sounds counterintuitive, but by setting a negative curve offset, you lower the target voltage the CPU will use to reach a specific clock frequency. It's undervolting, not underclocking. The lower target voltage actually allows the CPU to reach its max boost clock more easily since the temperature is lower and the voltage is farther from the board limitations, and thus increases performance. You certainly don't lose any performance with curve optmizer, it's the opposite.

If you have problems boosting to max clock frequency or you experience instability (especially at low CPU usage) after enabling curve optimizer, it's either because you went too far with the offset value or the board can't handle undervolting properly (which is not surprising with low-end boards). But if it's done properly on a board that can handle it, you will gain fps, not get less. I personally saw a significant improvement after doing it, especially for my 1% low.

 

[ItzEcliptikz]

That’s absolutely not how curve optimizer works. It sounds counterintuitive, but by setting a negative curve offset, you lower the target voltage the CPU will use to reach a specific clock frequency. It's undervolting, not underclocking. The lower target voltage actually allows the CPU to reach its max boost clock more easily since the temperature is lower and the voltage is farther from the board limitations, and thus increases performance. You certainly don't lose any performance with curve optmizer, it's the opposite.

If you have problems boosting to max clock frequency or you experience instability (especially at low CPU usage) after enabling curve optimizer, it's either because you went too far with the offset value or the board can't handle undervolting properly (which is not surprising with low-end boards). But if it's done properly on a board that can handle it, you will gain fps, not get less. I personally saw a significant improvement after doing it, especially for my 1% low.

Indeed. However, I think I will leave things stock. Getting great performance and temps as it is, I had issues with power draw (cyberpunk not pulling more than 30w at 2k maxed out) on a previous build on a b650, even after resetting bios, flashing, etc, was never able to revert the changes. Might have been Ryzen master overriding, but I did set it to default, and even revo’d it) either way, everything has been way smoother and less noisy with the x870-p!

 

[JayGau]

Indeed. However, I think I will leave things stock. Getting great performance and temps as it is, I had issues with power draw (cyberpunk not pulling more than 30w at 2k maxed out) on a previous build on a b650, even after resetting bios, flashing, etc, was never able to revert the changes. Might have been Ryzen master overriding, but I did set it to default, and even revo’d it) either way, everything has been way smoother and less noisy with the x870-p!

If it works fine and you are good with the temp then no need to do anything. My post was a reply to Aeacus who was confusing undervolting and underclocking (undervolting is actually a form of overclocking since it allows the clock to boost more easily with less restrictions).

By the way, never ever do this kind of stuff with Ryzen Master. Never! Always do it directly in the BIOS. Ryzen Master should be used only for monitoring purposes. It's always easy to revert changes in the BIOS, but who knows how Ryzen Master applies those settings. I personally don't trust it.

 

[Aeacus]

By the way, never ever do this kind of stuff with Ryzen Master. Never! Always do it directly in the BIOS. Ryzen Master should be used only for monitoring purposes. It's always easy to revert changes in the BIOS, but who knows how Ryzen Master applies those settings. I personally don't trust it.

+1

MoBo utility programs, despite having nice GUI and essentially covering entire system, usually produce issues which otherwise would not be generated when doing tweaks directly from BIOS.

That’s absolutely not how curve optimizer works. It sounds counterintuitive, but by setting a negative curve offset, you lower the target voltage the CPU will use to reach a specific clock frequency. It's undervolting, not underclocking. The lower target voltage actually allows the CPU to reach its max boost clock more easily since the temperature is lower and the voltage is farther from the board limitations, and thus increases performance. You certainly don't lose any performance with curve optmizer, it's the opposite.

I know the just of it but i'm concerned about the CPU longevity when one undervolts their chip. Since after all, undervolting starves the CPU from power it needs and CPUs are very sensitive even to the minute voltage changes. Sure, you get less thermal output and in turn, more thermal headroom, but i'm not sold it being a "free" performance boost.

Now, when chip is hot running off the bat or CPU had inadequate cooling, then undervolt can help to reach higher frequencies, which CPU otherwise wouldn't. But i'd improve CPU cooling rather than starving the cores of power (aka undervolt).

There aren't any studies made on the ill effects of undervolting and if it has any impact on CPU's lifespan or not. Since CPUs by default have a long lifespan (easy 10 years, even 20 years), it takes considerable amount of time to test it. And when undervolted CPU does die, it is difficult to accurately prove that it died due to effects of undervolting.
Undervolt the CPU too much, and CPU will not operate at all (CPU isn't stable). Or when you undervolt some and CPU is stable under load, it may be unstable when idle, since CPU itself downclocks and undervolts some more.

So, i'd rather run stock settings but invest in a better CPU cooler which provides needed thermal headroom, without worry of CPU lifespan shortening due to undervolt.

 

[SyCoREAPER]

Negative Curve will have minimal effect on performance, in most cases not even noticeable. However if you want to keep it stock that is your decision. You will notice the temps go down though and allow for extra headroom which is never a bad thing so long as you are still stable.

Otherwise get a contact frame and good thermal paste.