I5 760

[plum]

Ok so I currently have my CPU OC'd to 3.6ghz. Runs through intel burn at high stress, doesn't crash in games, seems stable to me.

http://valid.canardpc.com/show_oc.php?id=1435913

These are the values I set
DRAM 1.6V (mem multiplier 8,0 : 1333mhz ram -> 1440 mhz)
CPU Vcore 1.15625 V
BCLK 180 x 20

and finally, my QPI/VTT at 1.17V
This is where I'm unsure, as it's about 1.01V at stock I believe. Should this be lower/higher or is it just fine for my OC? I really don't understand what VTT voltages are so anyone could explain me that would be great and how it scales with the rest of my OC.

 

[saint19]

Test it with prim95 for 2 hours, OCCT for 3 hours or LinX for one hour if u can pass that the rig is stable.

 

[plum]

Not really what I asked.

I would like be enlightened on how to raise VTT volts. When, why, etc

 

[d1rtyju1c3]

QPI/VTT is like FSB voltage.
QPI is the bus between the memory controller and memory.
Q: Quick
P: Path
I: interconnect
Hope this answers your question. [:bohleyk:1]

 

[plum]

More or less, are you saying when you increase the FSB, you need to add volts to VTT?

Atm I'm at 180 mhz (x20) from 133 mhz stock so I was wondering if 1.17 V in VTT is roughly the right value needed.

Couldn't really find any detailed OC'ing reviews about the i5 760 to compare with others.

 

[d1rtyju1c3]

Only if it becomes unstable.
At 3.6 yo probably dont need that much. 1.12-1.15v should be enough.
Just try to lower it a little at a time until it becomes unstable and then bump it back up a notch or 2.

 

[plum]

I see, well I went to my bios to see if I could lower it and there wasn't the option for any value between 1.1 and 1.17 so I tried 1.1 and it ran through intel burn at high stress just fine. ran a game, no crash, nothing unsual, seems good. thanks for letting me know about that detail!

I have another question now, what is the difference between OC'ing through multiplier/increasing fsb and so on? For example, my maximum multiplier i can use is 21x i believe, so would there be any difference if i used 171 x 21 over 180 x 20 besides the ram going slower?

sometimes i see some people have different multiplier OC setups, so i wonder in what case it is better to use a higher one or lower one

 

[d1rtyju1c3]

It affects ram freq and QPI freq.

Here is a link that explains each setting and the effects.
http://www.mitramsi.com/tpsmods/502-overclocking-intels-core-i5-750-on-msi-p55-gd65.html

 

[plum]

Best answer selected by plum.

 

[d1rtyju1c3]

Thanks for the BA.
Good luck.