***Poison Your K CPU Post***
Hmm.. I have scanned through hwz and have not really found a full article on overclocking, apart from the many results posts. This post is not to show the satkiness of oc, but to provide a reduced wot and consolidated information for those who are interested to try out the 'poison'.
For cpu overclock, the easiest and the most common way is to go to the bios, manually key in the desired cpu frequency and assign a voltage. For the above, you can either sync all the cores to match the frequency, or you can do the per clock overclock (which is similar to turbo boost frequency assignment in intel chips).
One of the most important thing in overclocking is not to be greedy. Be realistic and go for +200-+300mhz increment on all the cores at the start. After which, go at a +100mhz pace. Recommended 24/7 oc vcore value is about 1.2x with the FLT at about 70+ degrees. Of course you would be able to push the cpu further in an air conditioned room with custom wc systems but do note that assigning high vcore values 1.3x/1.4x reduces the life span of the chip/chipset. The system might be running stable during stress tests but in time to come, some oc-ers might face random and frequent bsod issues due to the irreversible damage done to the chip/chipset. Do note that while more expensive mobos do not overclock better, they do have better quality chipset, capac and mos which can withstand higher voltage and heat better than their normal counterparts.
1) Take an i7-4790k for example. Set the cpu frequency 4.4ghz (key '44') and sync all the cores in the bios. After which, assign a vcore value at either a high 1.1x or a low 1.2x. Run stress tests (subjective applications) for a couple of mins, and if you encounter a bsod, up the vcore value by 0.01/0.02. Repeat until system is stable. Do have a pen and paper or excel sheet to tabulate a table for the frequency and vcore values for self checking. Monitor the full load temp ALL THE TIME.
2) On the other hand, you can go for a particular vcore value, say 1.25 and try to achieve the maximum stable frequency by varying the cpu frequency in the bios. The steps are similar to the above, but instead of changing the vcore value, you are now playing with only the cpu frequency component.
3) As for the per core overclock, you can assign values like let's say 46 46 45 44 and enter a vcore value (follow the steps in 1). In per core overclocking, the system would run at 4.6ghz for low load applications, and 4.4ghz x 4 during high/full load applications. People who do this normally want to get that extra juice from their cpu since their chip might not be able to run 4.6ghz x 4 based on their system components without hitting bsods/high load temps.
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4) More advanced and adventurous overclockers can play with bclk frequency/strap when working with highly oc-ed rams as blck frequency affects both the cpu and ram frequency (as well as pcie and sata! during oc). The former is abit dangerous to play with, and hence there is a bclk strap oc which would not affect pcie and sata during the process. By default, the bclk frequency is set at 100, and therefore for the previous steps, pumping 44 would give you 1*100*44 which is equivalent to your 4400mhz, or aka your 4.4ghz. The first component is your strap, the second is the bclk frequency and the third one is of course your cpu frequency ratio. For example, I can also go 1*110*41 to achieve a slightly better oc of about 4500mhz (4.5ghz), though it is advisable to go only 102-104 (+2 to +4) for a 24/7 stable oc. In bclk strap oc for example, I can use 1.25*100*36 to churn out a 4.5ghz. The straps come in 125(1.25)/166(1.66)/200(2.00)/233(2.33) for haswell components.
Apart from that, settings can be made to the load line calibration, cpu cache ratio and voltage as well to get that extra bit of overclock. Do note that the higher the frequency of your cpu, the lower the frequency the ram would be. There is a need for a compromise.
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*Rule of thumb: Always stay reasonable and cool.
*Air cooling is not recommended for oc.
*i7 chips have lesser oc headroom as compared to their i5 counterpart (intel wants to cap the frequency at 4.x as always). They will feed you with a higher based clock chip, but.. oc-ers know it =).
*Do not try oc if you are already experiencing high load temps during gaming. OC burns your warranty as well. Ouch!
*You would see an improvement after oc in your productivity work.
*For gaming, if you have already gotten a stable and solid fps prior to oc-ing, you won't feel or see any benefits, apart from the even higher fps + heat.
*#WOT