Enabling XMP ruins my CPU OC
Enabling XMP ruins my CPU OC
As mentioned in the title, when I turn on XMP I can't boot unless I revert my CPU overclock. My RAM consists of two 8GB DDR3 2133MHz sticks, and I'm running an i7-4790K on a Z97-G45 M.PSU.
While adjusting my CPU during overclocking, I had to perform a BIOS reset and didn't realize my RAM had dropped to 1333. Eventually, I stabilized it at around 4.7GHz with temperatures under 80°C and a voltage near 1.275V. However, when I noticed the RAM was running slowly, I enabled XMP, which immediately prevented me from booting into BIOS. This also occurred if I manually set the frequency to 2133.
I checked the base clock of the CPU and found it unchanged despite the RAM frequency change, which I assumed might be the issue.
If I run my CPU at its default settings, XMP works fine or I can adjust the frequency manually, so it seems like one or the other is the problem. I'm unsure how they should interact. Would anyone have encountered this issue before? I'd like to upgrade my CPU but not sacrifice my RAM's speed too much.
EDIT: I discovered that enabling XMP or manually setting the frequency doesn't allow me to raise the core voltage beyond 1.15V without the system failing to boot into BIOS. This happened even without attempting a full CPU overclock. I suspect the problem might lie with my motherboard or power supply.
Additionally, I tried Chris's suggestion to increase the RAM voltage, which let me boot at 1.2V core voltage. However, about four seconds into a stress test, my PC would crash and restart. For reference, the XMP voltage for my RAM is 1.65V, which I increased to 1.70V—though that was quite high.
since the memory controller is integrated into the CPU, it becomes sensitive to any changes in the processor. i think you're not as stable as you seem. try manually adjusting the exact xmp setting and increase the ram voltage slightly—like from 1.5v to 1.55v. if issues persist, consider reducing the cpu core speed to 4.6ghz.
since the memory controller is integrated into the CPU, it becomes sensitive to any changes in the processor. i think you're not as stable as you seem. try manually adjusting the exact xmp setting and increase the ram voltage slightly—like from 1.5v to 1.55v. if issues persist, consider reducing the cpu core speed to 4.6ghz.