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Some odd hanging issues while OCing a monster rig

Joined
Jul 25, 2017
Messages
2
Okay, first, some specs:

Case: Corsair Obsidian 900D
PSU: EVGA T2 1600W
CPU: Intel Core i7-6950X @ 4.2 GHz
Mobo: Asus Rampage V Edition 10
RAM: Corsair Dominator Platinum DDR4-2666 16GB x 8 (128GB)
GPU: nVidia GeForce GTX Titan X (Pascal) x2 (Two-Way SLI)
Storage: 1x 512GB Samsung m.2 SSD, 2x 2TB Samsung SATA III SSD

EKWB radiators, reservoir, pump, fittings, waterblocks and backplates (CPU, VRM, chipset, and video cards), Noctua industrial fans.

After I built it back in February, I got 18,431 in Time Spy, and it's been rock-solid until a month or two ago. Not too sure what's wrong. Been getting hangs lately (especially while multi-tasking, or tabbed out of a game), and when I power cycle it, I get that American Megatrends OC Failed error. It's not leaving any crash dumps. I recently force updated to Windows 10 1703, but I was getting these hangs in the previous build, too, and it left dumps back then.

I used the Windows debugging tools to look over the dumps and they pointed to intelnit.sys (Turbo Boost 3.0) as the culprit (IRQL_not_less_or_equal). I ran memtest. Nothing. Ran stress tests. Nothing. Temps aren't bad. 30 to 34C at idle, 58C under heavy load. Multi-task a little, load up the RAM a little bit, and it hangs.

I've been running 1.26v on the processor, 1.17v on the uncore. 100 base clock, multiplier at 42, all cores synced, cache ratio at 35 maximum. The RAM was using XMP settings for 2666 MHz. I figured maybe my voltages were too low and did some tweaking. Tried upping the processor to 1.27 and cache to 1.18. Still no good. I brought the RAM down to 2133 to see if it would help. Still waiting for it to hang again.

At this point, I'm not sure if it's a hardware issue or a driver issue. I've seen these same kinds of issues from drivers making bad calls on other people's rigs, and the stress tests aren't making it flip out. Just normal usage. It was stable for months, and then, after a round of driver updates, the stability really went south. Could also be bad RAM, I suppose. 8 sticks, 8 chances to get a dud. Not really sure what the hell's wrong with it.

I built this rig to do high-end DAW stuff in Cubase (orchestral samples take up lots and lots of RAM), 3D modeling/rendering and gaming, but I'm probably going to go with a dual-processor Xeon rig with ECC RAM for my next DAW machine, anyway. I need stability. I can't have my rig hanging in the middle of a project.
 
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