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Overclocking 4.5Ghz Approach 4770k

post #1 of 4
Thread Starter 
Hey guys,

I am working on overclocking my 4770k. Beside from being dissapointed with its OC capaility I am looking to find a stable overclock. I have given up on 4.6ghz with a corsair h110 and am not going to fight the temps for 100MHz. I really feel i should be able to achieve 4.5 with my cooling unless I have a dud of a processor.

What has me confused is the cache frequency. Should i leave the cache frequency at auto and try to work on the cpu frequency first? Whats the best way to test the cache?

I am now trying 4.5ghz with cache set to auto (3.9 probably) and a 1.25v vcore. Prime95 has run for 15 minitues no problems. A lot more testing to go.

What i have noticed with the cache (from last night):

4.3 at auto voltage will pass prime95 for an hour
4.4 at auto voltage boots into the os fine but as soon as a stability test launches i receive a freeze
4.5 at 1.315 tested for one hour works without failing

So last night i tried 4.5ghz at 1.3v with cache at 4.5 at 1.315v and got a freeze. So today I am going back to the start and just working on the frequency first and then i will worry about the cache.


What are you seeing with the cache? could this be my problem? 1.3v and 4.5 failing is pretty tough. Actually hoping its the cache that is unstable.

Just looking for some tips,
Paul
post #2 of 4
Quote:
Originally Posted by paulb787 View Post

Hey guys,

I am working on overclocking my 4770k. Beside from being dissapointed with its OC capaility I am looking to find a stable overclock. I have given up on 4.6ghz with a corsair h110 and am not going to fight the temps for 100MHz. I really feel i should be able to achieve 4.5 with my cooling unless I have a dud of a processor.

What has me confused is the cache frequency. Should i leave the cache frequency at auto and try to work on the cpu frequency first? Whats the best way to test the cache?

I am now trying 4.5ghz with cache set to auto (3.9 probably) and a 1.25v vcore. Prime95 has run for 15 minitues no problems. A lot more testing to go.

What i have noticed with the cache (from last night):

4.3 at auto voltage will pass prime95 for an hour
4.4 at auto voltage boots into the os fine but as soon as a stability test launches i receive a freeze
4.5 at 1.315 tested for one hour works without failing

So last night i tried 4.5ghz at 1.3v with cache at 4.5 at 1.315v and got a freeze. So today I am going back to the start and just working on the frequency first and then i will worry about the cache.


What are you seeing with the cache? could this be my problem? 1.3v and 4.5 failing is pretty tough. Actually hoping its the cache that is unstable.

Just looking for some tips,
Paul

I would set 1.25v core and set uncore to 32 to start with if stable notch up uncore what about your other voltages ?
post #3 of 4
It really depends on your luck with the silicon lottery, first figure out what percentile you ended up in by setting everything besides following on auto;

VCORE Manually, 1.2-1.5
HT 45/46
UN AUTO/3.5

If you manage to boot into windows with these voltages congratulations you won the lottery and will reach the 4.5 very easily.
However i advice you to read both guides posted here in the intel section by darkwizzie and sin
Of course there is a lot of things to consider but to get 4.5 use sin's guide for a template and very in depth reading.

Ps. Uncore or Cache Frequency does little diffrence while some reccomend you to keep it withing 300mhz of your core clock and some say it's optimal to use 1:1 (45/45) personally i think you will notice no or very little diffrence changing this values, remember core is king! I personally left mine @ 3.5 becuase it gives me more headroom for the core clock

I hope this made sense to you ~
post #4 of 4
Thread Starter 
Thank u for the responses i will continue to read. I can boot into os at 4.6 at 1.24-1.25v. I wish i could boot into it with 1.2v.

However i am now at 1.310v and 4.5ghz testing. 1.280 i previously tested and lasted for 5 hours under prime until a reboot. I will also get tru3man more voltage

information i am thankful for the help.
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