Hello, its 2020 and i am still using my beloved i5 2500K with 8GB 1333Mhz ram. Right now both on stock, i plan to overclock them and have a few questions: 1) PER CORE VS ALL CORE: this is what baffles me. Most ppl go for all core. But why ? I will give you an example. On same voltage i can do either all core 4.3Ghz or i can do per core where it will be 4.3Ghz when 4 cores are used, 4.4Ghz when 3 cores are used, 4.5Ghz when 2 cores are used and 4.6Ghz when only 1 core is used. Do you see why i think per core is better ? When all 4 cores are used, i will have 4.3Ghz in both cases. But lets say i use some strange app or game that only knows how to use 1 core. Well i will have 4.6Ghz then, which is 300Mhz more than if i used all core. So can u explain to me why in this case all core 4.3Ghz is better then the other option ? 2) RAM SPEED: I have 2x4Ghz 1333Mhz 1.5V kingston ram. In the past i tested it and at default 1.5V i had no problem running it at 1600Mhz, passed all tests. Now i am wondering, would it be safe to crank the voltage to 1.65V and try to reach 1866Mhz ? Is 1.65V OK or should i go only for 1.6V ? What if i cant reach 1866Mhz, is 1700Mhz an option and will still be better than 1600Mhz ? How will i know if i should opt for higher frequency or lower timings ? 3) Other: I use Asus P8Z77-V LX motherboard. Anything special i should know about, like some special settings i can set to reach higher OC at lower heat/voltage, etc. ? Any additional tips ?