DDR4 XMP - High SA Voltage?
DDR4 XMP - High SA Voltage?
Hi,
I recently installed a new PC and encountered issues with RAM XMP settings, specifically stability and voltage. My CPU is an Intel 6900k and I have two 8GB sticks of Vengenace LPX 3466 MHz RAM. Without XMP, the voltage is around 0.9V or higher. When I enable XMP, the voltage rises to about 1.468V, which allows me to boot, but my operating system only recognizes one stick. Other tools like CPU-Z and HWMonitor display both sticks, but the OS doesn’t handle them properly. After some adjustments, I managed to boot with both sticks visible at 3400MHz and 1.468V, though stability remained an issue. I found that a voltage above 1.25V is generally unsafe, and reading suggests keeping it lower. I’ve also tried running the CPU at 4.2GHz with and without OC, but the main worry is still the high voltage. Please let me know if this is correct or if I’m making a mistake.
Thanks a lot
Default settings for RAM are 1.2v, and the XMP 3466Mhz profile functions correctly at 1.35v.
Default settings for the RAM are 1.2 volts, and the XMP 3466Mhz profile functions correctly at 1.35 volts. http://www.corsair.com/en-gb/vengeance-l...m2b3466c16
MSI X99A Gaming Pro Carbon is configured with auto settings. I attempted manual SA adjustment but the system wouldn't boot. The I/O voltage seems low, though I haven't changed it. Could adjusting the I/O voltage help improve stability?
I'm not certain about the "optimized" default BIOS, but I can undo all modifications, which isn't the issue—just revert to default values. I'm now applying standard settings without XMP. I attempted XMP (functioning but requiring high SA voltage and showing only one 8GB RAM stick), then tried manual configurations (successfully achieved stable 3200 MHz with 1.3V SA). I'm currently using stock settings without XMP. I increased the IO voltage slightly and observed only 4GB RAM available (from my two 8GB sticks). Could the CPU not support such high OC? Or is this only possible at that voltage?
I understand it's not the issue, but if it disappears then your manual OC is incorrect. Does your board include an XMP profile option? I only enable XMP to test, and everything remains stable. I/O and SA are both at 1.25v. Your board and CPU can handle that memory profile, which suggests you might be misconfiguring the settings. Without knowing your BIOS details, it's hard to say for sure. Are your voltages changing just because you enable XMP, or are you adjusting the RAM frequency manually? It shouldn't be happening based on what I know. Is your RAM really compatible? It seems unusual.