@Maegirom:

Hello again.
I'm back because overnight my PC told me it wouldn't boot with this OC. Since I set it up, it's been working great, with the temperatures I gave you before, Prime and Linx tests passed, etc...

And today, as soon as I turned it on, I got the overclock failed message.
For now, I've increased a little (the minimum allowed increase) the vcore and the qpi voltage (vtt) and it seems to be going well. Right now I'm running Prime.

I'm annoyed that this increase makes a "7" appear again in the core temperature (right now I have a core at 70°C), when I had managed to keep them at a maximum of 68°C.

But what really bugs me is why what worked great yesterday (and for 2 months) doesn't want to boot today. Could it be that in 2 months the OC has deteriorated the components to the point of needing a little more voltage?

Thanks.
Best regards.

Well, you don't have to worry about the temperatures. They're good!
It's an i7 920 (2.6 ghz) standard, and you're already boosting it to 3.8 ghz.
It's logical that temperatures go up due to the voltage increase (necessary).
A system with good temperatures is considered when it passes stress tests (the most aggressive are the Intel Burn Test), and doesn't exceed 80ºC on the cores.
Because in your day to day, you won't reach that, not even close.

For example, in my tests, with an i7 950 4.00Ghz, with the same cooler as yours, I reach 78-77-75-74, the 4 cores, after 20 passes with the IntelBurnTest that uses 100% of the proc. and 95% of the memory during the test that lasts about an hour.
Similarly, Prime95 for 8 hours and doesn't go over that temperature, doesn't reach 80ºC.
Well, when playing games (which is what can stress you the most among other things), it doesn't exceed 70°C, all cores are around 60-68... We're doing great!
That's why your temperatures are GOOD.

The voltages are also quite low, that's probably why you got an OC failure.
I started with vcore 1.3, VTT 1.35, PLL 1.86, IOH 1.20... with 200x20.
And I've managed to lower the vcore for example, to 1.237, VTT to 1.33... I've left the rest like that.

Another thing. LLC corrects vdrop and vdroop... but doesn't eliminate it completely. Keep that in mind. Moreover, the closer the Vcore is to its limit, the lower the vdrop you'll have, up to a point that I in IDLE and in FULL had the same voltage (1.200v) and in the end it gave me an error.
In full, the voltage always drops more than in idle, generally speaking.

I would disable speedtest and C1E. It can cause instability (the voltage drops too much) and may be what failed you.

Regarding the benchmark result, 3dmarkvantage, keep in mind that it's a graphics benchmark, so what influences the most is the graphics. That's why you haven't noticed much gain.
Do the same with cinebench (cpu), and there you'll really notice the improvement, since it's a cpu usage test exclusively. (of the two it has, select the cpu test)

Best regards

Los mosfet que son los chips que manejan la corriente en el circuito VRM (Voltage Regulator Module) y que son los que llevan disipador, no son procesadores, su temperatura de trabajo es muy superior a una memoria o un integrado. Hay mucho hardware que trae estos chips al aire, sin ningun problema, solo cuando va a manejar mucha corriente se les pone disipador. Tu grafica claro maneja cacho y precisa de disipador en los mosfet del vrm, pero lo que trae de casa no es mejor que lo que le pondrias y funciona perfectamente, lo que sufre con el calor es el cpu que llega a equivocarse y hace artifacts en los juegos Los disipadores del termaltake son a la vista mas macizos un poco, pero ambos tienen ventiladores tirando aire sobre la placa y el vrm, poedes comprar un disipador a parte solo para el vrm, algun modelo del vrm de procesador, o algun modelo de disipador de chipset, disipadores de memoria grandes etc, pero si no vas a forzar el vrm haciendo overclock no deves preocuparte, todos los modelos te ofrecen mas o menos el mismo bundle de disipadores, algunos bloques de liquida cubren el vrm con la misma pletina, y el que trae la grafica pero claro ese es escaso. PD: Un ventilador en el lateral metiendole aire a la grafica cambia mucho las cosas, y si es de 12cm mucho mejor.

@Afake: te recomiendo tambien LaTienducha no es por nada, pero he estado echándole un vistazo y es carísima

Lo de los perfiles predefinidos, no es algo muy recomendable, pues muchas veces no bloquean ni el PCIe/SATA ademas de que suben algo mas los voltajes, quiza para el 5% no pero para un 15-30% si. Si con esa placa le sacas los 2600…suerte, y si quieres subir algo mas ves a por una Gigabyte o asus con chipset minimo 965 de segunda mano o P35/P45, y lograras hacer unos... voltajes mas bajos. Saludos!