Power & Temperature Testing
On this page, we are going to test the power draw on the CPUs, testing multi-core performance in Cinbench 2026 running for 15 minutes. We are also going to test the CPU package temperature using the same method.
The TDP of the AMD Ryzen 7 9850X3D remains the same as the Ryzen 7 9800X3D at 120W. In our testing, the actual peak package power reported by HWiNFO64 in the multi-core benchmark was around 141W-145W for both CPUs. Technically, the Ryzen 7 9850X3D was a little lower by 2%. It is good to see that it does not consume more power than the Ryzen 7 9800X3D, considering it is clocked 400MHz faster. This is much less than the Ryzen 9 9950X3D by 29%, and a massive amount less than the Intel Core Ultra 9 285K at 48%. The Ryzen 7 9850X3D does consume more power than the lower-powered Ryzen 7 9700X by 61%.
The AMD Ryzen 7 9850X3D had a package temperature of 86.2 Celsius at max, which is right in-line with the temperature of the Ryzen 7 9800X3D. It is good to see that the Ryzen 7 9850X3D did not run hotter than the Ryzen 7 9800X3D, despite it having a 400MHz clock speed increase. This runs warmer than the Ryzen 9 9950X3D and Ryzen 7 9700X, but cooler than the Intel Core Ultra 9 285K slightly.
CPU Clock Speed Comparison
Multi-Core
We wanted to compare the clock speeds between the Ryzen 7 9850X3D and Ryzen 7 9800X3D. Therefore, above the left screenshot is of the Ryzen 7 9850X3D, and the right screenshot is of the Ryzen 7 9800X3D. Both CPUs are running the Cinebench 2026 Multi-Core benchmark. We can see that the maximum clock speed increases from around 5.18-5.2GHz up to 5.4-5.585GHz on the new Ryzen 7 9850X3D running all-cores.
Single-Core
In the two screenshots above, we are now looking at single-core clock speed between the Ryzen 7 9850X3D (left) and Ryzen 7 9800X3D (right) in Cinebench 2026 single-core testing. We can see that the single-core frequency goes from 5.225GHz up to 5.470GHz on the Ryzen 7 9850X3D. This gives you a general idea of what to expect with core clock speed boosts with the new CPU.
Discussion (19 replies)
Join Discussion →That is an impressive 8 core single CCD CPU. Very nice...
Would be neat to see what a single CCD 12 core 3dvcache CPU would be awesome. :)
Exactly what we expected.
This is the only review showing less power use vs the 9800x3d, all other tests show the 9850x3d consuming more power.
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Brent can probably speak to this better, but there's a ton of variables that go into power consumption - including the game, the game resolution and game settings that are selected for testing. We don't typically do far ranging power analysis - Toms, for example, seems to be running all their standard tests through benchlab which makes it easy to pull together a ton of power graphs that correlate to the benchmarks run. Our power testing tends to focus on games.
There can also be differences in where the power is measured - benchlab (which they used on the power testing page) is an external to the system pass through that doesn't directly measure CPU usage, whereas we're pulling our power measurements from HWiNFO64. Though, really, I can't tell what method they used to measure CPU power usage in their gaming benchmarks as it's not disclosed....
As stated in the review: "
As stated in the review: "On this page, we are going to test the power draw on the CPUs, testing multi-core performance in Cinbench 2026 running for 15 minutes."
The method I used (and always have used) is a simple Cinebench Multi-Core, full-load, power test. I run Cinebench on the multi-core benchmark for at least 15 minutes, looping. I have HWiNFO up on the screen, and monitor the "Package Power" reported. I then graph the maximum or peak power number represented.
I do not claim that this is a thorough or detailed power test. It is meant to verify or validate all-core power loads and report on the quoted or rated TDP from AMD and Intel. I am aware that TDP is the thermal design power recommendation for cooling.
I do claim this is a valid measurement, and a real-world use-case scenerio that an end user would realistically encounter in real-world usage. For example, if you are editing and encoding or transcoding video in a video editor, or running 3D renders, or anything that pushes all cores to the max, this is the power you would experience in a real-world use case.
This is different than testing power while gaming. This is not showing power while gaming. I have done that in the past, on certain CPUs, but this was not that. You will note that Tom's testing was in games, which has a very different load than what I was doing. I was using productivity-based testing.
In addition, I am aware there are more accurate ways to capture power usage, but our reviews don't focus on that aspect. This method shows the 'cap' that the motherboard BIOS sets for package power. We can see that power is above the "TDP" number they provide, and we can see where it caps out with this method. I encourage you to look at other reviews for more detailed power testing and analysis.
I hope that helps.
One thing I'll also add to my statement: Testing power while gaming will be very different from all-core full-load testing because, while gaming, the CPU cores will boost to higher frequencies and voltages, since less of them are being used, and the workloads are lighter. Therefore, the peak power registered on such things as the EPS rails will be higher and peak higher than pushing all-cores to full-load at the same time. When doing that, the clock frequency and voltages are lower, and thus it peaks lower overall.
That makes sense to me. You're not investing in power measurement devices like what others are doing as that is not your intended level of testing. This is more a user experience and repeatable test than say a specialized break down. Its clear tne texhnical chops are here and are in essence providing the tools and guidance to replicate local testing by us more... savvy I dare say... readers. Letting us more easily identify anomalous behaviors.that may or may not exist. (Looks cautiously at ASROCK motherboards.)
Nice CPU for sure but I'll be waiting for one (either the 9950X3D2) or something else down the road to replace the 5800X3D in my spare rig and the main one with a 9800X3D is plenty for now.
As always, thanks for the review!
why all the hoopla on a CPU that's not worth buying?
It's only a little bit faster than the 9800X3d, but is more expensive, draws more power and generates more heat.
I don't see any scenario where getting a 9850X3D over a 9800X3d makes sense.
The folks who have to have "the best"
Someone who just now is coming into tax money to build a new box and leave their 3000 series behind?
Should depend on pricing and availability more than anything. My guess is that we'll see the 9800X3D chips start drying up leaving the 9850X3D as the only choice and/or the price point will be so close that the extra $10-20 might as well be spent.
My original theory is the 9800X3D will go away and be replaced by a lower binned 9700X3D to provide some separation, but AMD has stated the 9800X3D production will continue (of course, that may mean just for one day....)
I've seen this suggested by others. I think they have contacts too. Starting to think this is a leak. :p
If the rumors of the 9700X3D are true, that's one more kick to Arrow Lake. The 265K will lose its appeal quickly since the 9800X3D's $449 price was making it turn up in the shopping cart of some people. Now people like that could opt for the 9700X3D if they can get it at something like $389.
Using canadian pricing as an example, I don't see an imaginary CPU causing any issues for intel.
265KF is $399
9700x is $460
7800X3D is $550
14900K is $620
9800X3D is $640
9850X3D is $720
285K is $780
Intel is the value leader right now. Given the price of ram. A full $240 difference between a 265k and 9800x3d. I won't even talk about the 9850x3d because the pricing makes zero sense. $80 more Cad$ is just terrible.