Solution 8KX 90hz artifacts, flickering black screen, Pitool 272 …
There are already several threads on the subject, but I wanted to make it known for most people to read by starting a new thread.
I have had obvious problems and have published several times about artifacts, black screen flickering in 90hz mode with Pitool 272 and the latest associated firmware, even though it has to be flashed separately.
Well, for me the solution has been to change the original cable (copper) for a new fiber optic one.
I already had problems with the stability of the image since everything started with 90hz in March 2021, but it was quite usable even with some screen flickering, I was also forced to use only one of the 3 DP ports of my graph (RTX3090), in each update of Pitool 270 → 271 → 272 and their respective associated firmwares, everything seemed to get worse increasing the flickers and even artifacts appeared. Fog also began to appear sporadically on the screens.
Well, in my case, everything has been caused by the quality of the original cable of the Pimax 8KX, it is clear that for 75hz it was enough for a correct transmission of the bandwidth. But when going to 90hz that quality was already so at the limit and the wear of the cable itself caused all these failures.
Today I received from AMAZON Spain in a single day the original Pimax 6m fiber optic cable, it has been to replace it and work perfectly in any DP output of the graph, but of course it was in Pitool 270 and firmware 298 beta enginer from August. Seeing that there was no problem that I was already having even with this version, I have updated to Pitool 272 and I have manually flashed the firmware that they offer in parallel. Now everything goes smoothly, working perfectly and in the poorest DP output on the graph.
I opened a support ticket commenting on all my problems and they generated an RMA to change the source cable (copper), but it has not reached me yet and I could not take the problems anymore, so I asked Amazon for the fiber optic cable to try and return or not, if it fixed the problem while waiting for the RMA replacement. I must say that the fiber optic cable is a marvel, not only does it solve these problems that many people are having with 90hz, but it is longer, thinner and more flexible than the original one.
I encourage all of you who have the same problems to open an RMA, of course, if they are still within the warranty year, I entered the term for a few days from the receipt of the 8KX in October 2020.
My thought is that the original copper cable does not have the quality to sustain 90hz in a durable way, it degrades with normal use and problems begin. They should always offer the fiber optic cable with the sale of the 8KX and many complaints and bad publicity would be removed.