Gadgetory

hello good people I'm Dimitri and today I want to experiment with something and this something has been on my mind for a very long time ever since the closing off of the front panel four cases has become the trend because there you compromise on the airflow so then what happens if you reverse the case airflow that is in taking with the rear fan and exhausting through the front and I'm talking about cases like this that have a completely closed front panel but potentially might have some sort of ventilation on one of the sides or both sides like with the aged 700 NZXT case so we'll see if having this sort of unrestricted intake from the rear and then maybe perhaps like a slower exhaust from the front panel so it doesn't just bounce back it will actually give us anything better instead of for the front fans having to fight for air because of this tiny gap here and on this enclosure so we shall see and I'm curious to see the results hope your - let's check it out right after this hi I'm looking for a case well look no further I got this beauty the H 700 I by NZXT with all steel premium frame with a side of tempered glass - beautifully showcase any cooling adventure you might pursue and came a management system that you wish you had earlier all this lit up with integrated RGB lighting and built-in fan control the H 700 I this one's for you I'll take it alright so for my cases I'll be using these guys the H 700 I from NZXT and there's a super cheap case for around $40 from cooling which is a mix between like the s 340 elite and the P 300 from fan tax and that the front panel on both cases is closed for that visual elegance that relies on side ventilation to deliver air and this approach to front panel ventilation is quite common so let's see if reversing the airflow direction will improve our temperatures now since I am air cooling my most recent case of choice was the H 580 mesh because of that open front panel allowing that strong column of air to replace the entire interior volume every second without the common restriction on airflow and to add some extra case heat we've got galaxy gtx 1070 TI that spits hot air in so I'm using my risin 1700 X system for the baseline temperature comparison inside the H 500 P mesh by Cooler Master I've removed the front panel so you can see what fans I'm using and these are my favorite case fans by far the silent wings 3 by be quiet so I have two of them 120 mils in the front I have a 140 for the CPU cooler and the 120 at the rear back so I'm using the exact same fan configuration and system across all three cases to see what the temperature difference will be and I am running these fans at full speed about 1450 rpm because they move a lot of air and they're extremely quiet I cannot hear anything while the system is at load that is the power of air cooling also the reason why I'm not reversing the airflow inside the hi-5 EP mesh is because the front panel is already non-restrictive so there's no reason to try to combat the poor air that you might expect from a completely closed front panel so I am starting with the cheaper case because the front panel is basically completely closed aside from the tiny ventilation and if my hypothesis is correct we'll get more fresh intake from the rear so that the CPU will be cooler and then we'll see what happens when we are exhausting through the front so the first system is assembled I absolutely love the way this looks like the whole matte black I mean ignore the GPU but this definitely shows this is a cheap case I mean look at these non-reusable PCI slots have to use pliers in order to get them out because that entire section for the PCI slots non-reusable so the first temperature test is complete and it got really toasty inside but I did make a mistake so initially I had mounted these fans outside of the frame so they're basically just touching the front panel which is a bit unfair so I have remounted them to be on the interior of the frame giving us a little bit extra space for that intake to actually do its thing and that way we can actually see what the difference would be when I had to when I've reversed the fans to so there is space for the air to exit all right it's time to reverse the fence and the reason why I chose the silent wings three is because they have the clips mount instead of using the screws so it's simply thinking of popping the fan out rotating it and I don't have to even catch a screwdriver nice the same thing for the bottom fan boom and I've also rotated the CPU fan and I'm keeping it in this position because I feel like mounting and here would be way too close the rear intake and therefore this allows for this like nice airflow channel instead of a two fans being so close together let's see what happens now my main concern with this setup is not GPU temperature because I feel like it's spitting out hot air so regardless of the air direction it's all present in the interior but the front exhaust fans I'm worried there's nowhere for the air to go because this thing is completely closed and only the side ventilation is available and I'm worried that hot air will bounce back into the encase creating a lot of turbulence but I am interested to see how that additional intake in the rear will provide additional that cool air for our CPU all right so the first reversed airflow test is complete I can feel a lot of heat coming right from the side here because that's the only way the heat can escape at the front panel but the CPU and GPU temperatures are surprising so I'm gonna see if we can recreate that behavior inside the larger aged 700 I all right so the system is now assembled inside the NZXT case I can definitely feel more air being exhausted from the sides because of this dual side ventilation so now let's do our stress test and see how the CPU and GPU behaves in the reverse airflow order now I realize with my previous configuration with the CPU fan being in its default orientation but just pulling air instead of pushing might introduce some static pressure differences so instead I've routed the CPU fan to push air through the CPU heatsink and I'm thinking that there's a fair way to compare the static differences between the two orientations all right people so the data is in let's take a look at the mother chip graph so starting off with the aged 500 pms as our baseline we have respectable low temperatures moving on with the cpu load as priority as I expected the additional unrestrictive cool intake from the rear benefits the cpu in this reverse scenario but GPU temperatures suffer quite a bit especially when compared to the normal intake and exhaust orientation inside the aged 700 I but with a slightly hotter CPU next up is the cooling kin the reverse orientation again having that cooler intake from the rear lowers our CPU temperature a little bit but there is no way for all that hot air to properly exit through the front resulting in a throttled graphics card whereas the default orientation balances out the GPU temperatures but with a hotter CPU and also keep in mind if you rotate the rear fan for intake dust accumulation is a concern and no case ever comes with a dust filter for the rear and so it is pretty clear that front panel design is crucial for temperatures so if you find yourself in a situation where your case has really restrictive front intake potentially rotating that exhaust vent at the back for intake will help your CPU temperatures as long as you don't mind the higher GPU temperatures and potentially ramping up the fan on the GPU to combat the hot attempts and I think the GPU is hotter because the exhaust fan originally helps to remove a lot of that heat for the GPU especially if it's circulating inside the case but also perhaps there's some recirculation of the exhaust that's happening that goes back into the case vier that rear intake fan alright so I hope you found this video helpful and let me know what type of fan orientation that you have going on for your system and what you found to be the optimal situation in your scenario I'm a Dmitry thanks so much for watching make sure to check out our ninth fans inside the case video that's pretty helpful for individuals who want to play around with intake exhaust for nine fans so that's pretty cool and we'll see you in the next video