If there is ample space between the PSU intake and the graphics card (assuming the PSU is at the bottom and the intake is towards the VGA) then there will not be a big problem. I had my PC in the 200R. Can't mount ex radiator fans to bottom of PC after swapping them for RGB Fans. I don't think it matters since the case is designed with that position in mind.
I'd like to see some rather tall feet on a "bottom-breather," unless a suitable mounting pedestal is to be supplied. I have three Antec 900 cases, all with PSU's mounted with the fans facing up. Problem is, the cases on sale are evenly split between top mounted and bottom mounted PSU slots. Just built a PC in one today (and my PC is in a 300R, which is very similar) and it's a fantastic case.
Other than familiarity, I can only think of one benefit of top mounted PSUs and that being that they are placed well above where dirt and dust bunnies sit which prevents them from getting sucked up into the PSU.
There is a vent immediately above the PSU (on the case top panel) through which the PSU fan can take in fresh air through that vent. SeaSonic S12II 520 Bronze 520W - enough to power Ryzen 3700x + 2060 super? Installed my power supply (Ultra LSP750 750-Watt Power Supply) on the bottom, fan side down, as suggested and two days later smelled the smell of burning components. This power supply has 135mm fan on it.
That way it'll cool itself with filtered air from below the case. Seasonic PSU won't turn on unless given "rest"! There seems to be endless debates about whether a bottom mounted PSU should have its fans facing up or down, so I decided to do a test. Would very much appreciate knowing which type of case is better for noise/airflow/cable management. A bottom mounted PSU even fan facing up will draw in far less hot air than a top mounted one b/c hot air rises.
Seasonic successor to the 'Focus Plus' series, ***OFFICIAL*** Ryzen 5000 / Zen 3 Launch Thread ***CONFIRMED***. Its a great case. My house is abysmally dusty. I would mount it fan down. It actually did a very long time ago when power supply fans were the only means of exhausting hot air generated by the cpu. If the "top" of a PSU is determined by when the English is rightside up, then my Seasonic X-series PSU has its fan on top. I prefer bottom. Opened the case side and found the top of the power supply too hot to touch.
Only option is to have the PSU mounted so the fan is facing upwards. All that being said, I still like the looks of top mounted PSUs over bottom, but that's just aesthetics. Bottom mounted PSUs are able to suck in the cooler air from the bottom, have shorter distances for the cabling (can be really noticeable on full atx cases where the motherboard power connector is quite far from the PSU), and generally lowers the center of gravity of the tower, making it less likely to tip. Would this be a safe way to mount your hdd. Ive always ran my top fans as exhaust since heat rises BUT since I got my H100 and its rad is mounted to the top of my 500R, I run the fans on the bottom of the rad as intake.
So your idea sounds plausible at first glance, but it is actually nonsense when you think about it. The case has a filtered port right below the PSU, apparently for the PSU's fan. If the "top" of a PSU is determined by when the English is rightside up, then my Seasonic X-series PSU has its fan on top. They blow it out THROUGH THE BACK. (top mount), Heatsink mounting backplates compatible with Cryorig H7, im looking for vertical GPU mount for h710.