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Thank you for responding to my inquiry. First of all I apologize if I have posted to the wrong subsection of the Intel forums. If that is the case may the moderator place this thread in the appropriate place.
Ok. Heres the issue. Basically I own a Msi X99a motherboard and a 6850k processor. I figured out how to 'mod' the bios to set an address variable inside the Platform IntelRcSetup module to enable the 8X port to bifurcate into two 4X ports. This was done by changing a hex value at a certain address that corresponded to the first IIO controller.
In anycase afterwards i noticed that my plextor M8pey drive that was inserted in the last pcie 8x slot (which shares bandwidth with the onboard M.2 controller hosting a Samsung 950 pro) would randomly upon a reboot not link up at 8 gt/s operation and at 2.5 instead. So I researched what could cause this and am exploring solutions such as setting the motherboards 'training latency timeout' timer from 1000 to 10000. Also turning on 'Extended Sync' mode on the IO controller for those ports and correcting mismatching L1 exit latency values.
To acomplish this i'm using the RU utility to change these system register values. Not sure if its fixed as of yet though because this very random. In anycase for the most part Im able to operate two nvme drives off of the cpu pcie lanes where it was not meant to be by design but since i have a 40 lane cpu i didnt want the extra lanes go to waste. Should also mention using a Supermicro bifurcated 8x to 4x4x adapter to get at the last 4 unused lanes but this speed issue occurs with or with out the adapter.
So my best guess as whats going on is that the bus is very noisy with all the peripherals including two video cards at 16X. Since I'm not a bios engineer familiar with pcie tech was wondering if someone with more technical experience could make suggestions?
Hello, Davidm71 :
Thanks for your reply.
Based on your previous communication and we ignore any information to give you support with the third-party board that you are using, we suggest you address your consultations related to the cited motherboard to the following channels listed as a reference:
We hope that this information may help you.