Have you ever had thermal issues with your computer and thought,
"Wow, if only I could get a bigger fan,
I might be able to put my side panel back on." Well, if that's the case,
we've got the fan for you. And uh this
thing is powerful.
Synergy allows you to share your mouse and keyboard between multiple computers
at once. Check it out now at the link in the video
description. So, this right here is the Delta
PFR912XH. Uh, let's let's call it the blowy matron. And at
$55, it is the most expensive blow I've
ever gotten. I mean, this thing is almost four times the cost of even a
high quality normal consumer fan. So,
can it possibly deliver four times the
performance? Well, funny you should ask.
Try more like seven times the performance. Ramping up to a whopping 11
12,000 rotations per minute. In open
air, Blow Matron can push a staggering
90 L of air every second. But how would
we actually demonstrate what that means
in realworld terms? This thing not only
spins faster than the engine of my Civic, it probably has more torque, too.
If you were to get your finger in this thing, well, to put it lightly, you're
going to have a bad time. Oh, disgusting.
It's only getting on me.
That's what happens when you put your finger in the leaf. Oh, we finally
stopped it. jammed full of carrot. So then with all of that blowing power, we
started to wonder, well, what are the realworld
applications? So here's one. If you're really crunched for space in your case
at 37 mm tall, the super tiny Noctua
NHLi is about as small form factor as
you can get for a heat sink. But of course, that comes with some trade-offs.
mainly that you aren't supposed to use it on a high TDP, that is the thermal
output CPU. But there's the way it
suggests in the manual and then there's the Linus TechTips way. So, can this
heat sink cope with a fully clocked Core
i7 7700K? Well, actually, it's a
surprisingly resilient little bastard and was able to keep our 7700 K running
at full turbo speed under synthetic load. Though, it wasn't exactly
comfortable at a maximum of 97° C.
Fortunately though, our CPU won't have to run hot for long since good old blowy
Matron is coming to the rescue. But how
much of a difference does a seven times
increase in air flow make for real world cooling? Well, Alex here is a great big
cooling nerd. So, the first thing we're going to do is look at it from a
theoretical standpoint. What is it that makes a heat sink remove heat from a
CPU? And why does a bigger, better fan
cool it more? To put it simply, there are three things that affect how much
heat you can remove from your processor. the surface area that is responsible for
cooling, the heat transfer coefficient of the process, and the temperature
difference between the CPU and the surrounding air. Now, it's intuitive
that increasing the amount of air over a heat sink will make it cooler. Think
about putting your hand out of the window of a car. You go faster, you cool
more. But how much can upping the air flow help your cooling? So to figure out
how big of a difference this is going to make, we have to calculate the
convective heat transfer coefficient of air or how much heat air can take away
from an object which is approximately equal to this formula where h is the
heat transfer coefficient and v is the velocity of the air. So, we know the
knock to a fan pushes air at about 1 meter per second. And plopping that into
the formula gives us an h value of 19.5
while blowing matron pushes air at 3.6
m/ second, giving us an h value of 25.8.
But Linus, it's pushing the air 3.6 times faster. Why does it only make a
25% difference to cooling? Well, you see, I was mathing the other day and
this one friaking square root over the velocity kept kicking my ass. You get
diminishing returns the faster the air
moves. So, bringing it back to the real world then, can this be confirmed with
the blowatron? Well, with it strapped to
our NHL 9i under full load and ID of 64,
the CPU maxed out at 73° C, leaving us
lots of room for overclocking. By the way, this also amounted to about 30%
cooler than the stock fan, close to our
expected temperature reduction of 25%.
And really, the LMG thermodynamics and precision pizza heating department
considers anything within an order of magnitude a compelling victory. Of
course, that compromised some of the space savings with our heat sink.
Leading us then to another question. This video really turned into kind of a
voyage of discovery. What's better, having a cooling solution that's 3/4
fins or 3/4 a fan? Well, we tested it
and in this situation, the fan actually
still wins in cooling performance per height. Although it isn't all hunky
dory. Strap one of these guys to your heat sink, you're off to the races with
a chilly CPU. First of all, there is power delivery. That stock knock to a
fan sips 0.14 amps at full load. The
blowy matron on the other hand, well, you probably don't want to attach this
thing to a fan header on your motherboard since it draws a whopping 4
1/2 amps at full load, which is nearly enough to overwhelm this bench power
supply. And of course, there's also the noise. The Noctua fan puts out 24 dB
maximum, which is quieter than someone whispering in a library. Compare that to
the 75 dB of the Delta, which is more
comparable to an alarm clock.
Synergy is a software download that solves the problem once and for all of
having two keyboards and two mice on your desk if you have more than one PC.
It lets you share a single mouse and keyboard between two or even more
computers seamlessly, so you'll no longer get confused about which one is
connected to which. They offer a basic and pro option with a one-time payment
for lifetime access. And the features include uh clipboard sharing between the
computers, dragging and dropping files between the computers, the ability to
set up hotkeys, and more. And the best thing is that Synergy is
crossplatform. Woo! PC, Mac, and Linux.
So, use our link in the video description to get up to 50% off Synergy
today. So, thanks for watching, guys. If you dislike this video, well, you must
be in the like banana protection league or whatever the case may be because we
we ravaged that thing. But if you liked it, hit that like button, get
subscribed, maybe consider checking out where to buy the stuff we featured at the link in the video description. And
also down there, we've got our merch store, which has cool shirts like this one, banana and carrot chunks not
included, as well as our community forum, which you should totally join.