I7 4790K previously had an OC to 4.8GHz but now fails to boot or access BIOS.
I7 4790K previously had an OC to 4.8GHz but now fails to boot or access BIOS.
Only some processors perform well when increased clock speeds are applied.
Right, taking out the battery on the motherboard worked. I tried setting it to 4.7 and it would go to windows and came back with the same errors as before but atleast i could enter BIOS. Then I put it on 4.6 and I could get into windows. I know that not all CPU's can overclock the same but I feel like the Noctua nh-d15 cpu cooler that I just bought is a waste of money if I can't get higher than this and should just resell it. Isn't really anything that I can do to get higher? My motherboard: Gigabyte GA-Z87x-DH3 CPU: 4790k Noctua nh-d15 cpu cooler All I have done so is set voltage to 1.200 and and set the cpu ratio to 4.6-4.7-4.8 , and I can only boot with 4.6
Not every CPU can hit a high OC. Your 4.6 score is clearly superior to those limited to 4.5
Using your Noctua cooler allows you to push around 1.3Vcore. Right now I'm at 1.286Vcore with my Hyper 212 Evo. Stability depends on voltage, and even a good overclocker probably won't hit 4.7 or 4.8 at 1.2vcore. I plan to start at 4.8, adjusting the voltage in small steps of 0.01 until it works. If that fails, I'll try 1.25, then 1.3 if needed. If it still doesn't work, I might lower it a bit and see. My 4790K reached a limit at 4.6GHZ, so I need to push voltage up another 0.075 to reach 4.7. That means it's probably not worth the effort for me right now. Coolers don’t guarantee high overclocking; they mainly help with temperatures if you go that high. I might consider custom water cooling and aim for 1.35V and 4.8/4.9GHZ later, but I doubt I’ll get much more performance from my CPU at that point.
This setting is too low for the current spec. Even 4.6 works well, so pushing it up will probably fit fine.
You can't just assume the clock speed will rise without boosting the voltage. I've faced this issue with my FX before. At the edge of maximum performance, the required voltage increases rapidly—exponentially rather than linearly. On my FX, I can reach 4.7 at 1.432, but stability demands around 1.48 for 4.8. The gap is significant and the heat differences are substantial.
The voltage stays around 1.35 until it reaches my limit, after which it drops to about 1.32 or 1.35. It seems a maximum of 4.8 is possible.