i7 9700k & i9 9900k Cooling

[easyrider]

That's down to Asus marketing not talking to their design. Attempts to win a VRM phase count war, when they should have just called it a redesign. There's efficiency gains from using power stages with integrated drivers compared to discrete driver + FETs. Using doublers for PWM isn't 'true' 8 phases either, hasn't been for generations. Its all nonsense. There's nothing wrong with the Hero's VRM. Its ripple is fine, transient response is excellent and its bloody stable. Efficiency puts it at 20W heat loss at 250A. Comparable to the Aorus Master, which I've also had and sent back. The Hero clocked better and its damn sight easier to use.

Thats all the info I need sir Thanks

 

[easyrider]

Seems the asrock was pumpig way too much vcore when I loaded the XMP profile on.

here is the Asus Maxmius.

All I have done is load the XMP profile temps are 53c full load...

 

[easyrider]

I said I would update after installing the Asus Maximus Hero XI

I loaded the XPM profile 1 in bios just like a did with the ASrock Motherboard. No other changes made.

Ran exactly the same Benchmark




These are the temps now (Asus Maximus Hero XI ) Full load 4.7ghz all cores



These are the temps with Asrock Extreme 4 Full load 4.7ghz all cores

 

[doyll]

But you said in your opening sentence I dont have increased airflow? Even though I can physically feel it with my hand...Noise with the extra two running at is negligible having unplugged them and plugged them back in. They are running at 460 rpm

You are miss-quoting me. What I said was

"Stacking fans with no resistance does not change amount of airflow. All stacking fans is increase fans' static pressure rating .. so if fans have low pressure ratings and are being used in highly restrictive conditions (like CLC radiators) the added resistance to ariflow will increase airflow through radiator."​

If your fans are low pressure rated as have a static pressure rating near the resistance level of radiator then having a 2nd fan in push/pull increases their ability to overcome that radiator resistance and that means more airflow.

Fans (most any fans) have extremely low static pressure ratings at low rpm. A fan with 1.5mm H2O static pressure rating at 1800rpm will have maybe 0.3mm H2O rating at 460rpm .. not high enough pressure rating to overcome radiator airflow resistance. When you stack 2 of these same fans at same low speed their combined static pressure rating goes up dramatically to almost twice as much meaning they now have high enough pressure to overcome radiator resistance .. that is why you can now feel more airflow.

2x fans side by side with no resistance will flow twice as much air as a single fan. 50cfm + 50cfm = 100cfm
2x fans push / pull on a cooler or radiator have same cfm rating as 1x fan. 50cfm into and out of 1st fan is still 50cfm into and out of 2nd fan.

But 2x fans in push/pull on a cooler or radiator doubles the static pressure rating. 0.0mm H2O into 1st fan is 1.2mm h2O out of 1st fan and into 2nd fan increasing it another 1.2mm H2O adds up to static pressure being 2.4mm H2O. This increased pressure means they can overcome the resistance of your radiator and flow more air.

Higher static pressure rating means a fan can overcome more resistance to airflow.

But this does not work just stacking fans without some kind of airflow stratightener between them, like cooler or radiator .. unless one fan is spinning opposit direction of other. Reason is the fan impeller creates a spiraling airflow so if 2nd fan in stake is spinning the same direction the spiral of airflow matches fan impeller meaning 2nd fan impeller is doing almost nothing.

If you had just increased our single fan's speed by 100-200rpm you would probalby have increased your airflow and noise level about the same as adding 2nd fan does. At least that is what people who have tested the concept of stacked fans vs single fans have found out in every test I've seen.