Question Want to improve my CPU cooling, so what is more effective?

[IEC]

I have a 5800X and set its PPT to 105W for negligible MT performance loss and zero ST performance loss. It also runs almost 15C cooler.

 

[bononos]

I have a 5800X and set its PPT to 105W for negligible MT performance loss and zero ST performance loss. It also runs almost 15C cooler.

Why didn't AMD use a lower PPT as the default, were they looking for every ounce of performance because of competition from new Intel cpus?

 

[DrMrLordX]

Why didn't AMD use a lower PPT as the default, were they looking for every ounce of performance because of competition from new Intel cpus?

Obviously not; AMD has been setting 142W PPT for their 3800x and 5800x since 2019.

 

[moinmoin]

Why didn't AMD use a lower PPT as the default, were they looking for every ounce of performance because of competition from new Intel cpus?

With a high PPT as the default they cover all bases without extra SKUs. Want lower PPT? The user then can use Eco mode or set PPT to something lower without voiding any warranty.

 

[blckgrffn]

With a high PPT as the default they cover all bases without extra SKUs. Want lower PPT? The user then can use Eco mode or set PPT to something lower without voiding any warranty.

I enabled eco mode on both of my 5800x - and still they stubbornly hot spot and spin up fans. I probably got sub-optimal silicon. But yes, it is an option and I appreciate its inclusion.

 

[moinmoin]

I enabled eco mode on both of my 5800x - and still they stubbornly hot spot and spin up fans. I probably got sub-optimal silicon. But yes, it is an option and I appreciate its inclusion.

Eco mode only drops a 5800X to 5600X's level (which also has hot spots) so you could easily go further down (though hot spots will always be there to some degree unless you avoid boosting altogether).

 

[Dave3000]

Well, about 3 weeks ago I replaced my 2 CoolerMaster 120 Silent case fans with 2 Arctic P14 PWM case fans for the intakes and the CoolerMaster 120 Silent case fan with an Arctic P12 PWM as a rear exhaust. CPU cooling did not seem to improve at all. Actually, my Cinebench scores are consistently slightly lower after than fan replacements due to the CPU throttling a little more to try to not go over 90C. I was expecting the opposite to happen since these are supposedly better quality fans than the ones I replaced and going from 2x120mm intakes running at 1200 rpm (Q-Fan control off) to 2x140 intakes set to run at 1000 rpm I expected better airflow to the CPU. In fact my CPU seems to be only slightly cooler than when I used the stock case fans (1x120 intake and 1x120 rear exhaust). Also I tested the fans at max speed settings and it did not seem to make any change to the CPU temperature, except for a much noisier system.

 

[Dave3000]

3 days ago I switched back to my CoolerMaster 120mm fans and now I'm getting about 100 points higher in Cinebench 20 CPU multicore test consistently once again and my CPU does not thermal throttle as much now. I would usually get between 5800-5900 (on a few occasions dropping as low as the upper 5700's) in CB20 with the Arctics and with these CoolerMasters I'm getting between 5900-6000 and never dropping below 5900. This seems strange to me as these Arctic fans are advertised to produce better airflow and static pressure than these CoolerMasters, plus when I had the Arctics installed, I had 2x140mm for intakes (and set them to run at the same rpm's as the 120mm CoolerMasters which is around 1200 rpm). I was thinking that the front intake cutouts of my case were probably designed for 3x120mm fans in mind, rather than 2x140mm fans for intakes, as there are metal strips that block some airflow from the 140mm fans and the fan intake cutouts are sized for 120mm fans and much smaller than 140mm fans, despite this case supporting 140mm fans as the case has screw holes to accommodate 140mm intakes as well. Could that be why I'm getting better CPU cooling with these CoolerMasters (1x120mm exhaust and 2x120mm intakes) vs Arctics (1x120mm exhaust and 2x140mm intakes)? Also when I had my Arctics installed I set them to a fixed 1200 rpm, but then again even setting them to variable speed (based on CPU temperature) did not seem to do anything for CPU cooling, and just made this PC louder. Should I have gone with 3x120mm Arctics as intakes instead of 2x140mm Arctics as intakes due to my cases intake fan cutouts size?