Issues with RAM failing to reach maximum performance settings.
Issues with RAM failing to reach maximum performance settings.
Hey there, I added another 2x8GB Corsair Vegeance RGB Pro to reach a total of 32GB. All the modules were rated at 3600MHz with identical timings and model codes. After enabling XMP, my motherboard reported an overclock failure. I removed the old RAM and installed the new ones in slots 2 and 4 as suggested, and it worked perfectly at 3600MHz. But using the first and third slots kept failing to reach that speed, even when the second and fourth slots were empty. I increased the IO and SA voltage up to 1.2v and a bit more, but it didn’t help. Right now I’m running the sticks at 3333MHz with a BCLK of 102.5, which was the setting before I adjusted it after the PC started up with 3333MHz RAM. My system specs include an Intel Core i7-8700 MSI Z370 Gaming M5, 4x8GB Corsair Vengeance RGB Pro DDR4-3600, Zotac GeForce RTX 2060 Super, 250GB Samsung 860 Evo, 400GB Intel S3610, and a 2TB Toshiba P300 Cooler Master V850 Gold PSU.
I'll go with the same idea. Using all four sticks, then adjusting the VCIO and voltage, and checking again. Edited September 14, 2020 by TofuHaroto
Likely poor board layout, especially if it fails at 3600 at slots 1 and 3—dimming isn’t too bad since everything runs smoothly at that speed. CPU weakness in IMC shouldn’t make slots 1 and 3 unstable, as they all operate at 3600 just fine.
Currently CPU IO and CPU SA are both at 1.2v. Values 3000 and 3200 remain stable. Adjusting the voltage doesn't affect the outcome.
It might simply be the IMC not managing 3600 on all four dimmers, which puts more strain on the IMC. You could attempt updating the BIOS and see if it makes a difference, but the performance gap between 3400 and 3600 won't be obvious.