I'm experience crashing/rebooting/occasional BSODs when I run my memory in it's XMP profile with no other overclocks. With XMP enabled, the system can run MemTest for 24 hours with no errors, but crashes often in Windows, sometimes immediately after boot or with relatively no load. Revert the RAM back to stock speed and it works flawlessly for weeks on end.
Corsair 32GB kit (2x 16GB) DDR4/3000MHz 15-17-17-35 1.35v (see attachments for additional timings)
Motherboard is running is pretty much default aside from a few modified boot & CSM options that are necessary for NVMe boot. One thing I have noticed is that even as the XMP calls for DRAM voltage to be 1.35v, it is consistently at 1.344v.
I have a strong suspicion that I just need to flip a few settings but not sure where to start. Any feedback is appreciated!
Other system specs: -Intel Core i7 #6700K @ stock 4.0GHz/4.2GHz (Turbo) -Corsair H115i Closed-loop CPU Cooler -Asus Maximus VIII Hero Z170 Motherboard, latest BIOS (v1504, same issue with v1402) -Samsung 950PRO M.2 NVMe, 512GB -WD 6TB Black, SATA-III -Nvidia GeForce GTX 760, 2GB GDDR5, PCI-E 3.0 x16 -Windows 10 Pro. x64
+1 on carefully tweaking up the VCCIO and SA voltages. That seems to be mandatory for high speeds on DDR4. 1.25 for VCCIO and SA were what stabilized my system -- Maximus VIII Hero, I7 6700K 4.7GHz, G.Skill DDR4-3000 16GB dual-channel.
Try setting the "Maximus Tweak" option to "Mode 1". This relaxes the set timings slightly. At 3000MHz, even slight timing variances can have a huge effect and this seems to allow for some tolerance.
BIOS 1601 also seems to help. Can't put my finger on it, but overall stability and performance is just better.
Motherboard: Maximus VIII Hero Processor: I7 6700K - 4.9GHz OC CPU Cooler: Corsair H80i v2 Memory: G.Skill DDR4-3000 16GB Graphics: EVGA GTX 1080 FTW2 1721/1860MHz Storage #1: 1TB Western Digital Black Storage #2: 2TB Western Digital Black Case: Antec Nine Hundred Power Supply: Antec Edge 650 80+ Gold OS: Windows 10 Pro
First off, thank you for all your help so far on this.
An update. Updated my BIOS to 1601, no change. Then I boosted the VCCSA and VCCIO voltages from around 1.15v to 1.20v, with my DRAM running at 1.344v (supposed to be 1.35v, forcing to 1.355v still makes it run at 1.344v) and enabled Maximus Tweak Mode 1. With these changes, I continued to experience issues with the system locking up.
I RMA'd the RAM... got a new kit of the same stuff. Same results. At Eric's recommendation, I boosted the VCCSA and VCCIO yet again up to 1.25v. Running some tests tonight so I'll report back on the status of it. If you have anything to add, I'd love to hear it. Thanks so much!