Can't overclock someone help!
Can't overclock someone help!
Whiteskyhd :
burnhamjs :
Are you overclocking your CPU when using XMP profile 1? I thought about enabling XMP in a standard profile to check if it will start up. If it doesn't, it might be better to run MEMTEST86 on the RAM. I've also tried this on stock settings and it still doesn't work, so I'll need to perform a memory test. I saw somewhere that my particular CPU might not be able to push memory over to 3000MHz but could go up to 2400MHz instead. I wouldn't be surprised if your i7 6700k can't support a 3000MHz memory OC.
Whiteskyhd :
burnhamjs :
Are you overclocking your CPU when using XMP profile 1? I thought about enabling XMP in a standard profile to check if it will start up. If it doesn't, it might be better to run MEMTEST86 on the RAM. I've also tried this on stock settings and it still doesn't work, so I'll need to perform a memory test. I saw somewhere that my CPU might not support memory overclocking to 3000MHz but could handle something like 2400MHz instead. Your motherboard supports Dual DDR4 3400. I suspect you're using slots A2 to B2 for your RAM, but you could switch to A1 to B1 to see if it works.
jpatrick2 :
Is your CPU overclocked when you're using XMP profile 1? I thought about enabling XMP in a stock profile to check if it will post. If it doesn't, it might be better to run MEMTEST86 on the memory. I've also tried this on stock, but it still doesn't post—probably needs a memtest. I heard my CPU might not support memory overclocking to 3000MHz, only up to 2400MHz or something. I'm surprised your i7 6700K wouldn't be able to do that. What could be the reason it won't post in XMP mode?
Whiteskyhd :
Ignored the suggestion, I manually boosted the RAM speed to 3000mhz at 1.25v. Everything seems to function properly in Windows. XMP tends to raise the frequency, tweaks DRAM voltage and some timing parameters. For instance, the Corsair Vengeance LPX DDR4 3000MHz operates at 2133MHz, 1.2V with a timing of 15-15-15-36. When XMP is active it adjusts to 3000MHz, 1.35V and 15-17-17-35 timing.
burnhamjs :
Whiteskyhd shared that they manually increased the RAM speed to 3000mhz and adjusted the voltage to 1.25v. Everything seems to function properly in Windows. XMP tends to boost frequency and tweak DRAM voltage along with timing settings. For instance, the Corsair Vengeance LPX DDR4 3000MHz operates at 2133MHz, 1.2V with specific timing values. When XMP is active, it changes to 3000MHz, 1.35V and a different timing pattern. They kept the original timings, wondering about their impact.
I'm not certain about the purpose of this board, but searching for "understanding ram timings" should lead you to a Hardware Secrets site with a clear explanation. Consider the first number, the CL (CAS Latency), which indicates how many clock cycles the memory must delay to provide requested data. A memory with CL = 15 will take fifteen cycles, while one with CL = 12 will take twelve cycles for the same task. Therefore, the faster memory is the one with the lower CL. Keep in mind that when you overclock the memory, maintaining tight timing might not always be possible. The Corsair Tested overclock details—such as frequency, voltage, and timings—are embedded in the memory and activated when the XMP profile is enabled. You should be able to view these specifications on the Corsair website under the tech specs section for your memory.