Core and Uncore ratio doubts

[wsarahan]

Hi guys how are you?

I have a doubt here, i have an i7 4770k @ 4.5 with 1.3vcore

I was looking at bios trying to increase something and saw that my uncore ratio was set to auto, and the bios suggest that the uncore be the same or higher than core ratio

is it true? Should i put auto off and set the uncore to 45 as well? Will i have some real gain? Can happen any issue like instability?

Thanks

Edit: Another question, I`m using 1.31 vcore to 4.6, do you think i can reach a stable Oc with less? I know that the basically to more than 4.5 we will need something about 1.3 to more right? Or am i wrong?

 

[slag]

I had the same uncore question. I was told not to worry about it, set it to the default multiplier or auto.. However, if you want to experiment, go ahead.

 

[YBS1]

You can set uncore as high as or lower than core, but not above. Assuming the mainstream chipsets/cpus behave like the X99, around 4000MHz will typically be about your limit on uncore. On X99 boards with Asus's OC Socket (and competitor's versions) you can sometimes get ~44-4600MHz. You will see minimal real world benefit from increasing it above default, but it can boost some bench numbers slightly.

 

[tolis626]

YBS1 is right, but I do wanna add that you shouldn't mess with it. You can probably gain 10-20 points in Cinebench and next to no real world benefits by overclocking your uncore, but you do introduce another point of possible instability and by increasing uncore you usually have to use a higher vcore on top of a higher ring bus voltage to be stable, increasing heat output. In short, it's so not worth it that it's not even funny. I've tried and have got mine up to 46x. I had fun with it, but there is no point in messing with it anymore. Back to 42x (or 40x? I don't even remember) for me.

PS : I think 1.3V is kinda high for 4.5GHz. Maybe you should try lower. I'd definitely not go higher than 1.325V for everyday use. In fact I have backed mine off to 4.6GHz/1.275V and honestly can't tell a difference apart from noise and temperatures being lower. You can even underclock/undervolt your uncore and try to achieve lower core voltages. There is a relative thread in overclock.net, go check it out. :thumbsup: