The boxed cooler Wraith Prism and Wraith Stealth
One thing in advance: the smaller Wraith Stealth of the Ryzen 5 7600 is quite sufficient for gaming and normal everyday CAD as long as neither rendering nor a harder compute is executed on the CPU. The CPU isn’t very well suited for that anyway. With under 40 watts on average during gaming and around 50 watts during normal work, the cooler never reaches its limits. Under full computing load, the Ryzen 5 7600 can consume up to almost 90 watts, which is exactly when it gets loud and hot. The cooler is simply overwhelmed with this waste heat. Otherwise, the CPU stays below 80 °C on average, which is completely sufficient.
The Wraith Prism on the Ryzen 9 7900 does quite well up to about 90 watts, although the power consumption is also limited to 90 watts by default. Depending on the case ventilation, this is slightly borderline, but it almost never throttles, only a bit in the absolute stress test. From this point of view, this cooler has its justification even in cases of hardship. While it is usually below 75 °C during gaming, it can sometimes exceed 90 °C during the stress test. The Wraith Stealth, on the other hand, is more suitable for light processor fare. And it’s louder than Prism.
The bottom line is that you could do without an extra cooler for both CPUs, which definitely makes the Ryzen 9 7900 a bit more interesting, since you save the cost of an extra cooler, which means at least a 30 euro discount. The smaller Wraith Stealth is more of an emergency solution when the budget is no longer sufficient. By the way, both coolers come from AVC in Taiwan and are also available in stores without the AMD label.
Temperatures under load with water cooling
As far as the temperatures as such are concerned, you can of course still get by quite well with a “normal” AiO when gaming. You stay well below 90 °C package temperature, even during rendering and compute, so you can avoid the almost obligatory 100 to 200 MHz clock loss. When gaming, you should always be able to stay below 70 °C, which results in little or no noticeable clock losses. A good water cooler with no more than 30 °C water temperature should not exceed the 75 degree mark even under load, unless the water block is no good. It is then clearly below 65 °C in gaming.
The base and the heat flux density
I have already written a lot about Ryzen and Zen 4 and also published a video. Since both CPUs serve an identical TDP class and the PPT is also very similar, I don’t have to address this again, especially since the new 65 watt CPUs can even be cooled quite well and safely with air. Here I simply refer once to my already published preliminary work on this subject, there the reading (or video consumption) is worthwhile in any case, also in relation to the base:
- 1 - Introduction, preliminary remark and CPU data
- 2 - Gaming Performance HD Ready (1280 x 720 Pixels)
- 3 - Gaming Performance Full HD (1920 x 1080 Pixels)
- 4 - Gaming Performance WQHD (2560 x 1440 Pixels)
- 5 - Autodesk AutoCAD 2021
- 6 - Autodesk Inventor 2021 Pro
- 7 - Rendering, Simulation, Financial, Programming
- 8 - Science and Mathematics
- 9 - Power Consumption and Efficiency
- 10 - Temperatures and Cooling
- 11 - Summary and Conclusion
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