Raz Ghost

I have the Gigabyte Gaming OC 3080 and original had a Corsair RM750, it triggered the PSU safety cut off once after 3 days and TBH that was enough to convince me to spent the extra £100 to get a RM850X. No issues since.

Wouldn't you just set the refresh rate of the monitor to 60Hz in that case? 

Ah I see what you mean now, I'm not sure if you can use the motherboard video out at the same time as a dedicated GPU or at least on some boards you can't. There is also the question of if your CPU has integrated graphics in the first place

There is a button next to the IO with the power cables connected and the PSU on all you need to do is press and hold the flashback button for 3 seconds until the light next to it starts flashing. What you don't want to do is power the system normally using the power button.

Just make a point that when rocket lake is released you should wait 6 months for the 5000XT's to come out.

So in other words you've found a site that lets you pre order

Why not just use 3mm screws?

Yes you can, both of those sockets on your psu are the same the only difference will be the cable you use whether it has cpu 4+4 or pci-e 6+2 on the end of it 

I'm pretty sure the seat is the same, I sit in mine for 4 hours a day and its held up well, couldn't ask for more really

Only other option is Obutto ozone, while I've never used one I do have a Obutto revolution as my desk and race rig for the last 4 years and it's perfect. One thing I will say about the gt omega is that the pedals are fixed at quite a steep angle but that is the only drawback I can think of. Also it would be only just with your budget of 600USD.
 
You can find the obutto here: https://www.mainperformancepc.com/product/obutto-gaming-cockpits/obutto-ozone-gaming-cockpit/