KuraiShidosha wrote:
Does memory XMP affect CPU voltage demands? At base memory speeds my 4.8Ghz 1.250vcore is perfectly fine and stable. Can bench for hours without fault. As soon as I set my memory to XMP which is 3200Mhz, I get crashes in Realbench after only a couple minutes.
I've tried raising DRAM voltage, especially because for some weird reason the board isn't providing 1.35v like the memory asks for, it's only getting 1.344v instead. Raising that to 1.36 didn't help at all.
Then I tried raising VCCIO and SA to 1.2v up from ~1.15v. Also didn't help at all. Strangely power consumption dropped tremendously when I had the above voltages applied when compared to Auto and they were lower. Still, stability was much worse.
The only thing I can think of is raising CPU voltage. But is this normal? Does memory overclock really require a stable CPU voltage to be raised? I'm trying to keep voltage down as much as possible to avoid degradation. I'm pretty sure I've already seen some, or maybe it was just that initial burn in phase, because when I first got the chip 4.8Ghz was stable for Prime95 small FFT at 1.20v. After a few days I had to keep raising it to 1.25v to get it stable. This whole time XMP has been active but now I'm not stable at even 1.250v. That's when I decided to set the memory to standard and see what happens and yep the chip is perfectly fine at 1.250v again.
What should I do and/or be experiencing here?
What memory kit?
Auto ruling scales with frequency and is designed to work on a worst-case basis for poorer samples. So reducing this voltage manually would likely result in a reduction in power consumption (however you might be measuring it).
You can try Maximus Tweak Modes 1 / 2 from under the DRAM Timing page and test memory stability accordingly to see if these help. A slight bump in vcore may be required depending on how conditional the overclock stability is. If raising vcore helps pass Prime, then this is the solution.
Personally I would test with Realbench for 2 to 4 hours followed by HCI Memtest or Google Stress App for memory stability.
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