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Overclocking i5-760 - Page 2

post #11 of 20
hyper 212 ftw

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post #12 of 20
The fastest and simplest way to overclock is always bumping your voltages a lot, and simply set the desired clocks.
then start reducing the voltages until you find them stable.

It's simply WRONG (not something related on how you preffer, like some peoiple have suggested here. I have nothing against you, but you are out of your minds.)

Overclocking takes skill, knowledge, but mostly patience.
If you start at 3.6 then move to 3.8 and finally to 4.0 I would say you would spend 3 months doing that. every overclock is different... needs different voltages..... it's not linear, it not predictable what you will need.

so... start at a high voltage at 4.0 for example, and then start reducing them to the lowest possible...
for 3.6 or 3.8 it would be the same thing...
I mean.. going from 3.6 to 4.0 is not an evolution. it's two comletly different overclocks that have NOTHING to do with each other.

Keep what I just said in mind, it will save you time, and give you a more stable overclock in less time, with less work.


I will post something here I said to somebody with an i5 750, it might help you too.
Quote:
The vcore isn't the only voltage you should mess with...

the memory depends on your VTT, so you should raise it a bit
the other 2 votlages will matter if you go higher with your freqs...

now... I would recomend you to keep the multi at x20 and use a lower bus freq... that would probably make it easier


"where do I disable turbo boost?"
when you disable speed step, you disable turbo boost automatically.

One more advice... try to set your vtt a little higher, like 1.3v
this will make sure your memory is stable, no matter what.
then you can mess only with the CPU voltage, and find the lowest voltage for it.

Once you find the lowest voltage for stability on your vcore, start lowering the vtt to find it's minimum

to test for vtt stability use prime like this:

check Small FFTs, uncheck "run ffts in place", set memory to use to all the memory you have available -50mb

run for at least 2 hours this test to find stability for the vtt
run linx to find stability for the vcore, at least 50 runs, using all the memory available - 50mb

don't go for 2 hours of blend stability... that's not going to be stable at everything.. use my methods!!
I could use much less voltage to run 2 hours of blend....


Another advicie is to set the lowest QPI freq. value available.. (not sure if this is how it's called ion your board)

I hope that you can get a good overclock, and I believe these 2 posts of mine will help a lot, but feel free to ask anuything if you have doubts


ONE more thing...


the lwoer the voltages, the better, but temps won't really matter if you are below 85c, that's when our chips start to get unstable.
intel states 72c (for each core) so, if you are below that, you are more than happy - 75c linx means up to 65, for example, on ANYTHING but linx, and prime maybe 70...

safe voltages for vcore and vtt would be 1.4v and 1.35 respectvely, more than that, it would be best to use the chip under water.




mem oc won't really give you many benefits... so.. try to lower your mem ratio, to keep it below stock clocks, or/and loose the timmings a little.
btw, a higher VTT will also icnrease CPU temps, so if you are hitting 75c at linx, finding the best cpu vcore as I told you to do, your final temps will be much lower, once you find the best VTT...


Again, for the people that suggested those dumb things, I have nothing against you. I know it's not your fault, you were jsut told the same crap your trying to pass on, without stoping to think about what it mean....

Eduardo
post #13 of 20
Quote:
Originally Posted by Whos-bad View Post
Hey miahallen I am checking your system and it is impressive, but is it true that you have only 450W power? My new system will be :

i5-760 , GTX 275, Gigabyte P55A-UD3, DDR3 4GB RAM , HAF 922 case and I have 500W power suply and Im worried it will be little for a system when I try to OC it, so I'm considering in bying 750W is it worth it?
I did a full performance assessment of the system, and I was very impressed, you can read my review here:
http://www.techreaction.net/2010/09/...-and-gigabyte/

Quote:
Originally Posted by ~sizzzle~ View Post
Depends, a good 500 watt PSU would be better than a crappy 750W one. Nvidia's min. recomeded system power is 550W though.
Very true!
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post #14 of 20
Thread Starter 
Nice review! So what then should be a good PSU? Corsair 650W maybe or Silverstone Olympia 750W ?
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post #15 of 20
everything you want to know:

3 step lynnfield overclocking guide:

http://www.techreaction.net/2010/09/...ide-lynnfield/
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post #16 of 20
Not every power supply operates at their Listed Wattage, it may say 750 Max PEAK Power, that means that's the maximum possible, that doesn't mean it will sustant 750 Watts. You should generally tally up your total wattage you need and then give yourself 20-30% headroom over what you need. This will account for voltage dropping, which can in turn cause your computer to lockup or kill your motherboard if your using more voltage / wattage than your Power Supply can handle.

For most basic overclocked i5-750 or i5-760 with a good graphics card which requires a power connection to it, then you should use at least 600 Watts, if your not using a high powered Video Card (one that doesn't require the power cord attached), then 450 to 500 Watts is fine.

Technically a 400 Watts could very well be more than enough, provided you don't have a lot of EXTRA components inside or a high powered Video Card, nor multiple high speed fans or neon lights running. You should see the total wattage each piece uses and add them all up, if it's over 350 watts than you should use higher than a 400-450 watt power supply.

Remember 20-30% over total wattage used and you will be fine!

Hope this helped someone...
Edited by _GTech - 9/29/10 at 9:40pm
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post #17 of 20
I got my i5 760 to 4.4ghz without a lot of effort. I think besides the higher multiplier I think it might be higher binned as well. 760s tend to hit higher clocks with less voltage than the 750s.
post #18 of 20
Quote:
Originally Posted by Poisoner View Post
I got my i5 760 to 4.4ghz without a lot of effort. I think besides the higher multiplier I think it might be higher binned as well. 760s tend to hit higher clocks with less voltage than the 750s.
Very nice. What kind of voltage and temps did you have for 4.4GHz ? I have a 760 sitting here I'm hoping is a clocker.
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post #19 of 20
Quote:
Originally Posted by ~sizzzle~ View Post
Very nice. What kind of voltage and temps did you have for 4.4GHz ? I have a 760 sitting here I'm hoping is a clocker.
I took it to 1.4v vCore, the maximum safe limit according to Intel. I don't have any temp info because I didn't run any benchmarks. It wasn't that stable b/c I didnt change my VTT or all that other Intel stuff you change when overclocking. So if you have half the skill I do then you could maybe get another 300mhz out of it atleast.
post #20 of 20
Quote:
Originally Posted by Poisoner View Post
I took it to 1.4v vCore, the maximum safe limit according to Intel. I don't have any temp info because I didn't run any benchmarks. It wasn't that stable b/c I didnt change my VTT or all that other Intel stuff you change when overclocking. So if you have half the skill I do then you could maybe get another 300mhz out of it atleast.
Well I guess I'll find out here shortly if the little I know about overclocking Bloomfields will carry over to Lynnfield. Hoping to push it a bit.
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