Ram killed my OC

[Big Head Tech]

So I purchased a 2x16GB DDR4 Corsair LPX CL15 3000MHz kit.  I have the identical kit in 2x8GB.  However, it would not boot passed 2133MHz for some reason.  Now my 2x8GB kit that has ran 2933MHz for a week is having stability issues.  Anything passed 3.75GHz on the CPU it keeps locking up in windows.  Mind you I did a several hour stress test of 3.8GHz 2933MHz Ram speed.  Voltage is set to auto because if you adjust the voltage the speed sticks at 1.5GHz.  I have an Asus x370 Pro board, EVGA G2 550W PSU, GTX 1080 Hybrid, Ryzen 7 1700.

[GDRRiley]

4 memory stick normally results in lower speed and ryzen right now doesn't love 4 sticks with different capacities 

[airdeano]

ryzen memory controllers are quite picky on what ICs are used, ratios, and arrangements.

though on the QVL, the CPU currently is the limiting factor. taking that same kit and installing them into an intel system will prolly not have any issues. using that same kit in the ryzen platform has hampered issues. even with the AGESA .6 version still finds a lot of qualified modules in the trash heaps.

my 2666 4x4GB kit won't boot other than 2133. boo on ryzen and the infant stages.

[Big Head Tech]

4 minutes ago, GDRRiley said:

4 memory stick normally results in lower speed and ryzen right now doesn't love 4 sticks with different capacities 

Gotcha.  I was trying the 2x16 kit separate not with the 2x8 kit.

1 minute ago, airdeano said:

ryzen memory controllers are quite picky on what ICs are used, ratios, and arrangements.

though on the QVL, the CPU currently is the limiting factor. taking that same kit and installing them into an intel system will prolly not have any issues. using that same kit in the ryzen platform has hampered issues. even with the AGESA .6 version still finds a lot of qualified modules in the trash heaps.

my 2666 4x4GB kit won't boot other than 2133. boo on ryzen and the infant stages.

Yes I've been messing with Ryzen since launch.  I am curious why my 2933MHz OC was rock solid for a week and now it keeps crashing?  I did a windows memtest and it passed no issue.

[airdeano]

in the old days we'd get the same treatment if the OC were thrashing the IMC on the CPU. so stability started to deteriorate.

chalk it up to a weak and junior IMC issue. prolly start a support ticket with amd to see if they can lend any more support to the degradation that seems to be happening or that CPU support for RAM is clearly not stable..