I've been running my I7-3930 at 4.7GHZ for years on air, with a heat pipe cooler.
I swapped last fall to a water loop that works great, not really any lower temps, tho.
Last week, it wouldn't boot at normal overclock; I had to roll back to stock and start over.
Neither the memory or the CPU will hit the same speeds; I believe I've killed the processor, finally.
I have a killer mobo, a X79 Sabertooth; I measured all the mobo voltages, and they match what the board is reporting. (there are test points...)
It works fine, but maxes out at odd ratios; the processor is just different.
It ran at 4.7GHz from ~January 2012, so 5 years at a 4.7-2.8=1.9G OC.
I suspect electromigration on a power trace somewhere has made a new voltage drop.
I've seen this before at normal speeds from overheated chips in a production environment, so it really does happen, eventually.
I'm shopping for a new chip for my main mobo; I want an 8 core Xeon that will overclock, lol.
I can only hang the V1 and V2 chips, the V3 are ddr4.
And, the only OCable Xeons in 2011 pin are apparently the i7-16XX series.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
I'm not Human enough to be human; but I'm trying to fit in, and I'm learning to fake it.
"Never said Hibbity..." - Brian Williams