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welcome back to the workshop today we're going to be checking out power supply positioning we've heard a bunch of stuff

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over the years uh with case feet do this without case feet do that with a

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basement do this turn the fan so it's facing up into the case cuz it can help

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cool your graphics card and all this other mumbo jumbo so let's try it out

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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

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the fan going up and down clear winner here is probably obvious but anyways uh

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without a basement we will do the power supply fan up and down and with a

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reference uh rear exhaust cool graphics card and

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with an internal exhaust graphics card we're also going to take system

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temperatures and GPU temperatures and power spy temperatures and ambient

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temperatures and thermometers everywhere let's get

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offer code at the link below so our first test has the power supply in the

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bottom facing down so the fan is pulling up from under the case and exhausting

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out the back this should not contribute to the system's temperature at all but I

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want it for uh like initial test anyways

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for the rest of the system I have a 390x not overclocked but running The Crisis 3

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Skybox test which will be putting stress on it and the CPU which is running on

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top of a hyper 212 Evo the CPU here is a 4790 K which is overclocked at 1.35 Vols

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so it should be generating some heat as well and with an air cooler instead of a

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water cooler it should actually be dumping heat into the rest of the system

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too so this is a pretty hot air environment so now that we're good to go

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we're going to wait 10 minutes so everything can heat up okay so the first

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test is done our ambient outside the case right now looks like it's about

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25.4 I'm going to take this off of the front which is our thermal probe and

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then hopefully I can read an ambient temperature inside of the case looks

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like it's about 412 so that's actually quite hot inside

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of the case so just checking the numbers now it looks like the power supply is

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running at 32.5 de C at an RPM of about

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530 give or take a little bit the

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graphics card was running at about 87° C

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and the CPU was running at about 74° 72°

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C now we're we're going to try it with the power supply fan pointing up into

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the case but remember there is that basement panel there so I don't really

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expect this is going to go too well but we'll check out the numbers in 10

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minutes okay so the second test is done the outside temperature is at 25.5 de

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okay and then the temperature inside the case is looking like again it's right at

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about 41.5 we're getting the same temperature

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which is pretty much what I expected because the Thermal Zone in the bottom

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where the power supply is is isolated so turning it around shouldn't actually

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change anything we're just making sure that it doesn't Okay so checking out the

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power supply first it looks like it's about 40° C and we're running in fan RPM

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of 640 which is considerably higher than

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the 530 from before our GPU temperature

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during the test was sitting at right about 89° consistently throughout the

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entire thing and then the CPU was running at about

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67° so really the GPU and CPU had no

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change overall so we have now moved the system to the Define R5 I took the modu

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vents off the top so that it can breathe up there a little bit the fans are all

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plugged in and we are now taking the ambient temperature of the room from the

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side of the case because we like taking that right where the case is intaking

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air so we're taking it from the side because the front is a solid block the

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first test that we're going to be doing in here is the power supply pulling air

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in from the bottom and exhausting it out of the back with an internal exhaust GPU

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so a pretty standard setup the temperature going into the case in terms

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of of room Ambience is at about 25.7 de

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and then the temperature inside the system in terms of Ambience is about

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42° which is actually pretty damn hot now we move on to the software stuff we

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get to see that our power supply is running at about 584 RPM at a

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temperature of 35° C our CPU is running at about what looks

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like 67° which is on par with what it was

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doing before and our GPU temperature is

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actually pretty hot at 94° throughout the main testing

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area so now things get interesting we're in the same case same graphics card set

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up internal exhaust same tests all that kind of stuff but now the power supply

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has its fan pointed upwards some people say that this can help your GPU thermals

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or your system thermals as it pulls air out and then out the back of the power

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supply and the power Supply's temperatures will be fine anyway so

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we'll see if it actually does That Dun

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Dun Dun okay so for that test the room

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temperature was at about 25.8 de the

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system temperature we will grab right now yep that's 42° so basically no

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difference at all so the CPU is more or less at about 67° there is quite a bit

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of spikiness here also the GPU is still

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at 94° C now scrolling down to look at

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the core CLA to see any differences there it is also about the same it's at

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about 1040 in terms of core clock so it's not running at 94° but a little bit

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faster a little bit slower it's just it's doing the same thing but the power

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supply was a bit hotter so time to investigate more all right we have now

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removed our internal exhaust stricks 390x so I put in a 290 which should kind

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of you know take a little bit more power and probably cause a little bit more

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thermal destruction to the inside of the case so now 10 more minutes and we'll

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see how a rear exhaust card and a fan pointing upwards from the power supply

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manages to cool the whole system the temperature in the room right now is

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about 26° looks like our overall system

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temperature is way lower sitting at about

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29° the power supply is running at 36.5

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de with a fan RPM of 536 so the power

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supply is not even pushing that hard the GPU before I opened snag it was running

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at about 94° C with a clock speed of

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around mid 600s to Mid 700s and then our

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CPU is sitting at about 62°

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C okay so the last test is running right now the Skybox test is on the screen the

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rear exhaust card is installed and the fan on the graphics card is oriented

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pointing downwards so we'll see you in 10 minutes okay so the temperature in

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the room is a solid 25.8 de okay and

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then the temperature in the system is at about 29 28.9 29.1 de which is more or

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less what it was before so the internal

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temperature is the same power supply

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numbers here's a second okay so it's running at 41° cus but the fan isn't

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even spinning so it's not really trying that hard the graphics card is running a

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core clock of so it's 700 and something

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to 600 and something and the temperature

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is about 94° so there's no real difference there and the

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CPU is running at about yeah

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62 just before people ask for additional information the fan speed on both the

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graphis cards were both pinned at 45% so

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those should not have been changing and the fans throughout the syst system on

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both cases were pinned but I did use different fans again the system

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temperature and whatnot between the two shouldn't even really be compared their

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different cases using different fans whatever just isolate those tests so the

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information here is interesting and there's actually a few different results

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that you can come to depending on what scenario and what case type that you

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have so I'm hoping that these results are interesting to you some of them are

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fairly obvious like if you have a basement in your case don't point the

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fan towards the like roof of the basement where it can't breathe at

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all yeah the ones where it's like an internal exhaust graphics card it didn't

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really seem to help the graphics card which is what I was kind of help hoping

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for and it did increase the heat of the power supply one interesting thing that

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we did notice was with rear exhaust graphics cards if the power supply had

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its fan turned up into the case it actually did perform better in terms of

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the power supplies temperature nothing else not the system not the graphics

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card not the CPU nothing but the power supplies I'm assuming that's because

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there's air coming in through the front of the case that's fresh and nice and

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cold and is being pushed over top of the power supply and then out the back so

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it's able to breathe fresh nice cold air but what we did learn today is that it's

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not that big of a deal which is a very unfortunate and consistent conclusion of

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the workshop but there is different results per test and it's mainly based

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around the temperature of the power supply so while we're still definitely

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within uh what's safe for a power to run at you might be able to change your

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orientation or do something slightly different in order to fine-tune things

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because a zero overall impact in terms of your graphics cards performance and

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temperatures and whatever and saving a fairly noticeable amount of degrees on

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your power supply might not be a bad idea in terms of overall Longevity if

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you guys want to test it out and try it with your own graphics cards and your

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own systems with different setups and all that kind of stuff do it check it

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out on the Forum post that in the Forum thread for this video that will will be

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Linus if you like this video like it if you dislike this video dislike it if you

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that isn't this one or go on the Forum while you're posting the information

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