it seem jetplate is there for a reason. it probably wont overheat or smth but i imagine that performance will be worse
EK in the manual say:
"You can use any opening as an inlet/outlet port. Do not forget to plug the remaining two opening with enclosed EK-Plug G1/4 or equivalent"
I go into mine from the right underneath and out the top left to my cpu, no issues at all.
That's reverse flow. The correct flow is in at the left and out on the right. If you have it in reverse flow it won't make any use of the jetplate and you are potentially sacrificing cooling.
If you're going to use a jet-plated block in reverse then you need to open it up and remove the jet plate otherwise it will hinder performance.
Yeah they've started putting them on GPU blocks now as a selling gimmick. It's a bit retarded really because firstly if you're going to reverse flow the GPU (common in multi-GPU serial loops) it impedes flow for zero benefit so best removed. And secondly the reason CPU blocks have jet plates is so the can be reconfigured for multiple sockets, it's a compromise to enhance compatibility, but that's not even a concern for a full cover GPU block lol.I thought the jet plate was the little plastic square or the metal strip similar to a razor blade? Ive never noticed either of them when cleaning for installing to blocks. Only seen them on CPUs.
 
	