AMD Ryzen 7 5800X3D Power Consumption, Efficiency, and Thermals
AMD's Ryzen chips continue to have excellent power and efficiency metrics. Here we can see that the 5800X3D's position further down the voltage/frequency curve yields excellent results in our Handbrake renders-per-watt efficiency metric.
Here we take a slightly different look at power consumption by calculating the cumulative energy required to perform x264 and x265 HandBrake workloads, respectively. We plot this 'task energy' value in Kilojoules on the left side of the chart.
These workloads are comprised of a fixed amount of work, so we can plot the task energy against the time required to finish the job (bottom axis), thus generating a really useful power chart.
Bear in mind that faster compute times, and lower task energy requirements, are ideal. That means processors that fall the closest to the bottom left corner of the chart are the best. As you can see, the Ryzen 7 5800X3D features a nice blend of power and performance.
Test Setup and Overclocking
As mentioned, the Ryzen 7 5800X3D doesn't support overclocking via the CPU multiplier, so you can't change the core clocks via that method. You also cannot adjust the power limits (PPT, TDC, EDC) or CPU voltage. Additionally, the chip doesn't support the auto-overclocking Precision Boost Overdrive (PBO) feature, and you can't undervolt or underclock.
The 5800X3D fully supports overclocking the memory and Infinity Fabric, but as with most Ryzen chips, we found that we were only able to reach DDR4-3800 with the fabric dialed in at 1900 MHz. This setting allows us to run the memory in the desired low-latency 'coupled' (1:1 ratio) mode. You can get higher with uncoupled memory, but that results in less performance in games.
There have been reports of successful BCLK overclocks with early samples, which ekes out a few hundred extra megahertz of performance. We'll follow up with additional testing as time permits, but be cautious about overclocking benchmarks you might see in the wild: Remember, manipulating the BCLK has been shown in the past to cause inflated benchmark scores with AMD chips — but there are solutions for that.
We test Intel processors with the power limits fully removed for our standard measurements, so the 12900K and 12900KS are running beyond Intel's 'recommended' power settings, but remain within warranty. We haven't yet overclocked the 12900KS fully, so we're subbing in our overclocked 12900K configuration in its place. From what we've seen, it appears that the 12900KS silicon often clocks similarly to its non-S counterparts, but we'll update if we see a meaningful difference.
Aside from a few errant programs for Intel, the overall trends for both AMD and Intel should be similar with Windows 10 and 11. As such, we're sticking with Windows 11 benchmarks in this article. We also stuck with DDR4 for this round of Alder Lake testing, as overall performance trends are generally comparable between DDR4 and DDR5. We have a deeper dive into what that looks like in our initial 12900K review.
We tested the Ryzen 7 5800X3D in two configurations:
- Ryzen 7 5800X3D: Corsair H115i 280mm water cooler, default power limits, DDR4-3200 in Coupled mode
- Ryzen 7 5800X3D DDR4-3800: Corsair H115i 280mm water cooler, default power limits, DDR4-3800 in Coupled mode
|Intel Socket 1700 DDR4 (Z690)||Core i9-12900KS, Core i9-12900K, Core i7-12700K|
|Row 1 - Cell 0||MSI Z690A WiFi DDR4|
|Row 2 - Cell 0||2x 8GB Trident Z Royal DDR4-3600 - Stock: DDR4-3200 14-14-14-36 / OC: DDR4-3800 - All Gear 1|
|AMD Socket AM4 (X570)||AMD Ryzen 7 5800X3D, Ryzen 9 5900X, Ryzen 7 5800X, Ryzen 7 5700X|
|ASUS ROG Crosshair VIII Dark Hero|
|Row 5 - Cell 0||2x 8GB Trident Z Royal DDR4-3600 - Stock: DDR4-3200 14-14-14-36 | OC/PBO: DDR4-3800|
|All Systems||Gigabyte GeForce RTX 3090 Eagle - Gaming and ProViz applications|
|Row 7 - Cell 0||Nvidia GeForce RTX 2080 Ti FE - Application tests|
|Row 8 - Cell 0||2TB Sabrent Rocket 4 Plus - Silverstone ST1100-TI - Corsair H115i AIO - Arctic MX-4 TIM - Open Benchtable - Windows 11 Pro|
- MORE: Best CPUs for Gaming
- MORE: CPU Benchmark Hierarchy
- MORE: AMD vs Intel
- MORE: All CPUs Content
Level1Techs & Hardware UnBoxed has shown that the 5800X3D is a good value compared to the 12900KS or 12900K
I see this the other way its a fantastic upgrade for those on AM4 that may still be on Zen+ or Zen 2 and will prolong the life of those systems a few more years. Leaving time for pricing to go down on DDR5 when its time to upgrade.
Also, how could any conclusion be made without including 12900k/ks + DDR5 tests?
For example, from a TechSpot review, 12900k FarCry 6 performance was the following (no overclocking):
157 frames/sec - 12900k DDR4-3200
170 frames/sec - 12900k DDR5-6400
Details can be found in the "Gaming Benchmarks" section here:
Even after benchmarking the 12900k/ks with DDR5, the 5800X3D might still be ahead in the geometric mean. But since DDR5 prices are dropping I think most people buying a 12900k/ks may end up using higher-end motherboards with DDR5 to squeeze out every last drop of performance. So, can you add some Alder Lake + DDR5 results, please? (thanks!)
The only thing that I have noticed is my RAM seem to run hotter on the 5800X3D than the 3700X. It now runs at about 45-49c on stock XMP, previously 40-43.
True, but not in applications, which is half of this test, and the 5950X beats the 5900X quite handily due to having more cores. And since they compared it against an Intel processor with 16 cores, the 12900K, as well as the 12900KS variant, then they should have included a 16 core AMD processor as well for good measure, even though the 12900K and KS are quite a bit faster anyway.
Also, this thing is still 8 cores and 16 threads, it's not like it suddenly got degraded to a 4 core 8 threads CPU. I'm sure it should be fairly similar to the 11700K or at least 10700K and those you wouldn't say are slouches, no? Perspective is as common as the common sense, innit?