Amd ryzen 4000 portable: consumption analysis, its efficiency increases by 100%

AMD has more information for the next users of its Zen 2 portable platform. Now it has shown an analysis of consumption and battery of an AMD Ryzen 4000 notebook. It shows that energy efficiency increases by 100% compared to the previous generation, impressive to say the least, so let's see and interpret the following screenshots.

AMD Ryzen 4000 will be better CPU core in performance / efficiency

This is what the manufacturer intends to achieve, and it seems that he has achieved it judging by the results obtained in his captures. Let's think that above the pure performance in the CPU of a laptop, what every user is looking for is an autonomy that allows him to move without worrying about having a plug nearby.

AMD proves to have created the most powerful laptop processors, but not limited to just powering its new 7nm silicon Zen 2 architecture, but also controlling temperatures, power consumption and battery life. The ideal is to create a balance between these elements.

To put ourselves in the picture, portable AMD Ryzen 4000 processors have a 15% increase in IPC (instructions per cycle) performance and a higher clock frequency. The 7nm chiplet-based process causes the density of transistors a priori to double compared to the previous 14nm process, which couldn't compete with the Intel at least in performance.

Added to this is the latest energy consumption results, which place this SoC at 20% below the previous generation. With all this, the performance per watt consumed has increased by 100%, that is, double that of the previous generation.

It can be seen in the capture that the performance gain is 75% with the 7 nm node with the architectural improvements of the 4th quarter of the previous year. In this way, a laptop with a Max-Q design achieved in the tests an autonomy close to 12 hours with a CPU twice as powerful, if this is true it would be sweeping the previous generation and its competition.

Efficiency improvements in power management

In this scenario, a correct power management will make the differences, especially in the standby mode when the activity of the laptop is minimal in order to deliver the least possible power to the components. An improvement in the detection of activities has been needed and thus generate a ladder of energy states adjusted to the needs at all times. Working with a text editor is not the same as watching a video or playing a game.

AMD has structured this management system from the hardware level to the user interface and options from the operating system. For this, a correct communication between the operating system and the BIOS is required, which is ultimately responsible for the distribution of energy in the components through the VRM.

This should be reflected in the interface with its own options integrated into the Windows operating system, through performance profiles and user preferences.

Unlike the previous generation, for AMD Ryzen 4000 power states have been increased to three situations called LP1, LP2 and LP3, we imagine that from a state of rest to maximum performance. To do this, the CCX of the CPU and its voltage level are managed.

In this way the manufacturer figures the energy savings at 59% compared to the Ryzen 3000 when it is carrying out execution processes, this being a brutal improvement in efficiency.

Comparison between an Intel Core i7-1065G7 and an AMD Ryzen 7 4800U

It is undoubtedly a fairly consistent comparison between two processors with the latest current technologies and low consumption. For this, the teams have been 33% waiting, 33% working + browsing the web and 33% playing, with videos and a screen with 100% brightness.

In the case of the Intel CPU, a Dell XPS 13 2-in-1 laptop with a 10nm processor has been used, with 4C / 8T at 3.9 GHz, 8 MB of cache and Iris Plus graphics. The battery capacity of this laptop is 60.7 Wh.

Meanwhile, the AMD laptop chosen has been a Lenovo Yoga Slim 7 equipped with an AMD Ryzen 4800U equipped with 8C / 16T at 4.2 GHz, 8 MB of cache and Radeon Vega 8 graphics. The battery of this equipment is 60, 7 Wh.

In view of the captures, the AMD laptop lags a little behind in idle modes and waits, where the Intel platform does take advantage of it with some overtime, surely due to the lower number of cores. the CPU.

Where the AMD equipment does improve a lot is when it is used for graphics performance and stress, with PCMark 10 and 3DMark, taking the 60.7 Wh laptop out for about an hour. Let's also see that the consumption results are quite similar between both CPUs even though the AMD Ryzen has twice the cores, which is impressive.

Taking stock and average, the laptop with Ryzen 4000 reaches a total of 11.5 hours, which would be 2 hours more than the 49.9 Wh Dell and half an hour more than the 60.7 version, remember with a CPU with twice as many cores and better graphics.

Of course, along the way there has been information about the temperature conditions of the tests, the screen and the temperatures of each equipment, very important when evaluating consumption.

In any case, at least AMD is matching the consumption of an Intel laptop with a CPU twice as powerful. It is not a question of whether or not you are an AMD or Intel fan, the results are simply clear there. We only have to contrast this information when we have access to this new generation for analysis.

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