I would move the front-topfractal to the back-top ,and both fractals exhausting
If you have all hdd bays installed then have af140 in bottom as intake otherwise in front and the other af in side mod vent as intake(unless you have window).,
Ideally I'd suggest getting 1more fan...so front,bottom and side as intakes....rear,top as exhaust..also dust filter any intakes...then test your GPU temps and try side as exhaust....sometimes ,depending on the internal airflow you get better temps with side exhausting.
Also tidy up cable management if you haven't already done so.every little bit helps.
Off topic but important in the long run is dust- I subscribe to the positive airflow theory-more air/pressure coming in stops dust sneaking through gaps,holes,vents in the chassis -not always simple to work out unless you have all the same model fans at same rpm,but a little uncommon sense and time and observation will sort it out.
If none of the above helps then test gaming with side panel removed...if temps are still high then it's a gpu issue-replace tim,maybe better cooler$$$?
Hope this helps
side panel is a no go due to cpu heatsink size and noise.
i only have the bottom drive bay installed to hold a storage drive and ssd. the temps there remain fine so the top front fan seems more ideal since it's a straight shot to the gpu.
ill consider a fifth fan for the bottom front later but for now four will have to do.
is there any reason why you would recommend the fractal fans in the back as exhaust over the corsair?