im seeing about 10% performance loss in 3dmark results using an 8x lane vs a 16x lane.
What were your temps like dude?
I mean the temps over the weekend just gone were pretty warm in the UK but ...
I spent a lot of my Sunday moving the rad / switching between push and pull setups. What I found is having the EVGA hybrid GPU rad (AIO) at the bottom of the case with a fan under it pulling air from bottom of the case (but pushing the air up through the rad into the case) was the worst temp wise out of the options I tried so far.
Keeping the rad in the same position but popping the fan on top of the rad in push so the air pushes through the rad and out of the bottom of the case yielded better temps but not by much. Another problem with this is you loose one 120 fan spot next to it as the rad sticks out a bit both sides which covers the fan spot next to it.
The position I kinda ended up back in was with the rad on the side vent in push again but this time I moved the pipes under the card which kind of blocks the GPU shroud fan a little. However, the temps are better for me plus the case does shut. Disadvantage- doesn’t look brilliant, side vent issue - due to the AIO rad extending out a little both the fan spaces above and below are then covered slightly. So to get fans in those spaces a little modding is needed.
Sitting here thinking about it I could do push/pull on the side vent for the GPU rad which would allow the the fans below and above to go in as well. Wonder if that would increase the slack on the GPU tubes enough to move them out of the way of the shroud fan. Also maybe better temps. Hmm must try it...