S300 - Mini-ITX PC Gaming Case - Front I/O USB 3.0 Type - C Port - SFX Power Supply 100-130mm -Cable Management System - luminum Mini-ITX Motherboard Small Portable PC Case (PCIe 3.0 16X Riser Cable)

It was a real squeeze, but I did manage to put it together. It was all fine until I realized that the GPU specially got really warm. I noticed Corsair do Slim Case Fans and I thought perfect and managed squeeze one in. Problem is they fit at the bottom and really it could do with something to blow the heat out the top.I decided to get the S400 model because as I was looking it up, it was only like an inch taller and wider. Moved it all into this new case and it solved it from the get go. CPU is like 10 degrees cooled when idle and the GPU sticks to 30 where it should. The S400 lets you have 2 full sized fans on the top and I think that's what the S300 needed.I gave this a 3 because the case itself is an amazing case, but I know most will look at this case first, but I recommend you consider the S400.

This is a great little case, its well build but badly designed. For an i3 no GPU ITX build it would be fine.I used an i7 and 3060 Ti - too hot. Temps are within range but with prolonged use (gaming) it would easily throttle.The GPU riser cable has a bend in it, meaning it curves against the GPU once installed. It get's too hot.The GPU layout is too tight, it was horrible trying to mount it.There is no space what so ever for fans once the PSU cables are installed. This means there is zero cooling to the case at all.Highlighted in red where fans should go - no clearence under MOBO for 120mm, PSU cables take up the 80mm slot.