Is correct hoor. Het probleem van het grote verschil tussen QPI/dram (dit is eigenlijk het voltage van de memory controller) is
electrical migration: om kort te houden, het verschil in spanning tussen de geheugencontroller en het geheugen zelf is té groot.
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"QPI/DRAM Voltage - 1.35V: This is poorly worded by Asus - it should read uncore or QPI/memory controller voltage so not to confuse it with the actual memory voltage. Increasing this is also necessary as it helps overclock the base frequency as the uncore area overclocks increase in relation to the CPU core overclocks. This voltage is tied to actual DRAM voltage - the two are directly connected on the motherboard. You'll need to increase this to keep the CPU safe.
While Asus and Intel (rightly) scare everyone (read: uneducated) into thinking that 1.65V on the DRAM voltage should be the absolute limit before you reach for the fire-blanket, all that's really needed it to obey this: keep the CPU uncore voltage within 0.5V difference of the DRAM voltage and there's no problem. Over this potential difference and you’ll greatly increase the chance of CPU death, but it certainly won't happen instantly in a big ball of fail fire if you make a mistake.
DRAM Voltage - 1.66V: This is the closest to the 1.65V the
Corsair Dominator DIMMs wanted and it's within the 0.5V Uncore difference.
If you are familiar with Intel systems, the best thing to do is treat QPI frequency like you would Front Side Bus and cranking up the QPI also levies another advantage - increased memory frequencies. Because the Core i7 920 uses the basic 4.8GT/s QPI frequency there is no option available here to adjust it, so you don't have to worry about it, however being able to see what its "final frequency" post-overclock would be incredibly useful.
A little extra differential amplitude because Asus claims in the BIOS that it helps with overclocking and perhaps turning off some unused features like Virtualisation is worth it as well, but keeping the pre-fetchers and HyperThreading on will improve performance.
We found that enabling the HPET (High Performance Event Timer), or as Asus label it, APCI 2, is critical for keeping the clocks on Core i7 CPUs accurate. Without it turned on, the multiplier jumps around crazily if we watch CPU-Z, but with it on, the multiplier reading is solid and the clock frequency only jitters very slightly according to fractional variations in the base clock.
Note the most important thing: While Asus and Intel (rightly) scare everyone (read: uneducated) into thinking that 1.65V on the DRAM voltage should be the absolute limit before you reach for the fire-blanket, all that's really needed it to obey this: keep the CPU uncore voltage within 0.5V difference of the DRAM voltage and there's no problem. Over this potential difference and you’ll greatly increase the chance of CPU death, but it certainly won't happen instantly in a big ball of fail fire if you make a mistake."
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Die 1.65v is om mensen die NIET weten dat ze de QPI/Dram voltage moeten verhogen te weerhouden van hun geheugen voltage te verhogen en zo hun CPU om zeep te helpen.
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