welcome back to the workshop today we're going to be checking out power supply positioning we've heard a bunch of stuff
over the years uh with case feet do this without case feet do that with a
basement do this turn the fan so it's facing up into the case cuz it can help
cool your graphics card and all this other mumbo jumbo so let's try it out
we're going to do a bunch of different scenarios we have a case that has a basement in it and we're going to have
the fan going up and down clear winner here is probably obvious but anyways uh
without a basement we will do the power supply fan up and down and with a
reference uh rear exhaust cool graphics card and
with an internal exhaust graphics card we're also going to take system
temperatures and GPU temperatures and power spy temperatures and ambient
temperatures and thermometers everywhere let's get
started gfuel is the sugar-free Alternative Energy beverage to maintain
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offer code at the link below so our first test has the power supply in the
bottom facing down so the fan is pulling up from under the case and exhausting
out the back this should not contribute to the system's temperature at all but I
want it for uh like initial test anyways
for the rest of the system I have a 390x not overclocked but running The Crisis 3
Skybox test which will be putting stress on it and the CPU which is running on
top of a hyper 212 Evo the CPU here is a 4790 K which is overclocked at 1.35 Vols
so it should be generating some heat as well and with an air cooler instead of a
water cooler it should actually be dumping heat into the rest of the system
too so this is a pretty hot air environment so now that we're good to go
we're going to wait 10 minutes so everything can heat up okay so the first
test is done our ambient outside the case right now looks like it's about
25.4 I'm going to take this off of the front which is our thermal probe and
then hopefully I can read an ambient temperature inside of the case looks
like it's about 412 so that's actually quite hot inside
of the case so just checking the numbers now it looks like the power supply is
running at 32.5 de C at an RPM of about
530 give or take a little bit the
graphics card was running at about 87° C
and the CPU was running at about 74° 72°
C now we're we're going to try it with the power supply fan pointing up into
the case but remember there is that basement panel there so I don't really
expect this is going to go too well but we'll check out the numbers in 10
minutes okay so the second test is done the outside temperature is at 25.5 de
okay and then the temperature inside the case is looking like again it's right at
about 41.5 we're getting the same temperature
which is pretty much what I expected because the Thermal Zone in the bottom
where the power supply is is isolated so turning it around shouldn't actually
change anything we're just making sure that it doesn't Okay so checking out the
power supply first it looks like it's about 40° C and we're running in fan RPM
of 640 which is considerably higher than
the 530 from before our GPU temperature
during the test was sitting at right about 89° consistently throughout the
entire thing and then the CPU was running at about
67° so really the GPU and CPU had no
change overall so we have now moved the system to the Define R5 I took the modu
vents off the top so that it can breathe up there a little bit the fans are all
plugged in and we are now taking the ambient temperature of the room from the
side of the case because we like taking that right where the case is intaking
air so we're taking it from the side because the front is a solid block the
first test that we're going to be doing in here is the power supply pulling air
in from the bottom and exhausting it out of the back with an internal exhaust GPU
so a pretty standard setup the temperature going into the case in terms
of of room Ambience is at about 25.7 de
and then the temperature inside the system in terms of Ambience is about
42° which is actually pretty damn hot now we move on to the software stuff we
get to see that our power supply is running at about 584 RPM at a
temperature of 35° C our CPU is running at about what looks
like 67° which is on par with what it was
doing before and our GPU temperature is
actually pretty hot at 94° throughout the main testing
area so now things get interesting we're in the same case same graphics card set
up internal exhaust same tests all that kind of stuff but now the power supply
has its fan pointed upwards some people say that this can help your GPU thermals
or your system thermals as it pulls air out and then out the back of the power
supply and the power Supply's temperatures will be fine anyway so
we'll see if it actually does That Dun
Dun Dun okay so for that test the room
temperature was at about 25.8 de the
system temperature we will grab right now yep that's 42° so basically no
difference at all so the CPU is more or less at about 67° there is quite a bit
of spikiness here also the GPU is still
at 94° C now scrolling down to look at
the core CLA to see any differences there it is also about the same it's at
about 1040 in terms of core clock so it's not running at 94° but a little bit
faster a little bit slower it's just it's doing the same thing but the power
supply was a bit hotter so time to investigate more all right we have now
removed our internal exhaust stricks 390x so I put in a 290 which should kind
of you know take a little bit more power and probably cause a little bit more
thermal destruction to the inside of the case so now 10 more minutes and we'll
see how a rear exhaust card and a fan pointing upwards from the power supply
manages to cool the whole system the temperature in the room right now is
about 26° looks like our overall system
temperature is way lower sitting at about
29° the power supply is running at 36.5
de with a fan RPM of 536 so the power
supply is not even pushing that hard the GPU before I opened snag it was running
at about 94° C with a clock speed of
around mid 600s to Mid 700s and then our
CPU is sitting at about 62°
C okay so the last test is running right now the Skybox test is on the screen the
rear exhaust card is installed and the fan on the graphics card is oriented
pointing downwards so we'll see you in 10 minutes okay so the temperature in
the room is a solid 25.8 de okay and
then the temperature in the system is at about 29 28.9 29.1 de which is more or
less what it was before so the internal
temperature is the same power supply
numbers here's a second okay so it's running at 41° cus but the fan isn't
even spinning so it's not really trying that hard the graphics card is running a
core clock of so it's 700 and something
to 600 and something and the temperature
is about 94° so there's no real difference there and the
CPU is running at about yeah
62 just before people ask for additional information the fan speed on both the
graphis cards were both pinned at 45% so
those should not have been changing and the fans throughout the syst system on
both cases were pinned but I did use different fans again the system
temperature and whatnot between the two shouldn't even really be compared their
different cases using different fans whatever just isolate those tests so the
information here is interesting and there's actually a few different results
that you can come to depending on what scenario and what case type that you
have so I'm hoping that these results are interesting to you some of them are
fairly obvious like if you have a basement in your case don't point the
fan towards the like roof of the basement where it can't breathe at
all yeah the ones where it's like an internal exhaust graphics card it didn't
really seem to help the graphics card which is what I was kind of help hoping
for and it did increase the heat of the power supply one interesting thing that
we did notice was with rear exhaust graphics cards if the power supply had
its fan turned up into the case it actually did perform better in terms of
the power supplies temperature nothing else not the system not the graphics
card not the CPU nothing but the power supplies I'm assuming that's because
there's air coming in through the front of the case that's fresh and nice and
cold and is being pushed over top of the power supply and then out the back so
it's able to breathe fresh nice cold air but what we did learn today is that it's
not that big of a deal which is a very unfortunate and consistent conclusion of
the workshop but there is different results per test and it's mainly based
around the temperature of the power supply so while we're still definitely
within uh what's safe for a power to run at you might be able to change your
orientation or do something slightly different in order to fine-tune things
because a zero overall impact in terms of your graphics cards performance and
temperatures and whatever and saving a fairly noticeable amount of degrees on
your power supply might not be a bad idea in terms of overall Longevity if
you guys want to test it out and try it with your own graphics cards and your
own systems with different setups and all that kind of stuff do it check it
out on the Forum post that in the Forum thread for this video that will will be
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