Subject: EP2C602-4L/D16 pci Bifurcation support
Posted: 04 Jan 2018 at 7:38am
Edited by Coool - 36 minutes ago at 7:39am
Hello everyone,
Just registered to post my thanks to Flode for the solution.
Mine is a newly build machine with 8700K, Z370 Extreme 4, and G.SKILL F4-3600C16D-16GTZR (I didn't want the RGB, but those were much cheaper than the GTZ version...)
After getting all the components and putting them together, the first thing I did was boot to BIOS and update to the latest available version. All seemed fine, and Windows installed on the new nVME drive without any issues.
Then the problems started! I got exactly the same problem as in the first few posts in this topic - the machine would boot to Windows, and will run some tests/benches, but will freeze when left to idle or immediately after stopping say Prime95 (9 out of 10 times).
That got me pulling out quite some hair, and I even got a replacement memory kit from the supplier, but it experienced exactly the same issue, so apparently all this was not due to a defective ram kit. Then after a few days of searching I came to this topic and that solved my problem!!!
As my memory's XMP profile is higher than the one in the original post - my VCCIO and VCCSA voltages were set to 1.2 and 1.25 respectively. I lowered them both with 0.1 to 1.1 and 1.15, and the machine is now rock stable! No matter what benches I throw at it or how long I leave it to idle!
So the problem appears to happen with various ram modules certified for various XMP speeds, so maybe the new memory controllers just don't need that much voltage as older ones!!!
n.b. I have not clocked the CPU itself (other than the memory controller) - as I was trying to see if everything will just work together at the 'default' speeds it was sold to support.
Cheers!