a few i5 2500k basic overclock questions!

kinger8938

kinger8938

kinger8938

Soldato
Joined
23 Mar 2011
Posts
11,336
Following some advice on another thread i attempted to overclock my i5 (first oc ever) i went in for 4.5ghz with a fixed voltage of 1.35 (i think)

This was hitting high 80'cs in stress tests so for now settled for 4 ghz at 1.33(i think, will check)

Anyway what should i use? Fixed voltage or the other option?
 
Yea this was my thinking tbh! Just a bit scary as i dont know what im doing really but seems simple enough! So do i need to set voltage at a fixed figure of the other option, cabt remember its name!
 
What cooler do you have? Also 1.35 seems a little high for 4.5Ghz unless it's a poor chip, start at 1.25v via offset voltage and work your way u up until it's stable
 
nutsnut said:
What cooler do you have? Also 1.35 seems a little high for 4.5Ghz unless it's a poor chip, start at 1.25v via offset voltage and work your way u up until it's stable
Click to expand...

1.25 is way to low, the i5 2500K is quite a power hog, speaking from experience, you want around 1.35 for 4.5 ghz, then anything above that, 1.4v, 5Ghz i need 1.44v
 
I got 1.35 for some random guide tbh but seemed to be the sweet spot for the chip

I have a 3rd party cooler so better than stock so with offset what do i input? Doesnt make it clear what its offsetting from?
 
Cool thanks! Can someone explain offset voltage to me a bit more? What is it offsetting from? Is there a default value and you set the offset as like a tolerance?
 
OffSet Volts are a plus or minus on your 'stock' voltage.

EG: If at Stock your CPU requires 1.20v and @ 4.4Ghz you need 1.25 you would plus .05 offset. If that make sense.
 
Awahwah said:
OffSet Volts are a plus or minus on your 'stock' voltage.

EG: If at Stock your CPU requires 1.20v and @ 4.4Ghz you need 1.25 you would plus .05 offset. If that make sense.
Click to expand...

this makes sense thanks!

just having another play now, set it to 4.5 with 1.3 fixed volts just to see

with prime 95 it ran for about 45 minutes at about 85C max, so i went to get a tea and came back and the pc had crashed

so does this just mean i need to increase the volts?if so ive bumped it to 1.315v and am trying again

*a bit more info, seem to be sitting at 30-40C idle, with new settings prime didnt crash however when i stopped the test i got a blue screen and a reboot.

I wonder if my fans are set up right? mid 80s seems too hot but i suppose thats under full load which it will never usually be?
 
Last edited:
as is i have 2 intake fans at the front of the case (antec one hundred) and one on the side. i then have the built in big rear and top fans which i assume are out takes. however my CPU cooler fan is pointing upwards right at the exhaust fan. would it be best to flip this to point down as it may then benefit from my side intake?
 
today i upgraded my CPU heatsink to a coolmaster 212 evo, ant the temps are much better at stock.

i have now upped my clocks to 4.5ghz and am now stress testing! was hitting 90C before but so far its sitting at 60c tops in prime

i do have a few more questions though. should my CPU fan be set to full on or auto? its currently set to full on i believe.

if this overclock goes well, should i be using fixed voltage (currently 1.35V for this) or offset?

and i also manually set my RAM settings. by default on auto they were set to the wrong MHZ, 1033(or something like that) when infact the ram is 1600mhz, so i have set that manually it to 1600mhz with the timings 9,9,9,24 at 1.65 volts. do i need to monitor this too? if so how?


thanks

*also in core temp, it seems my frequency is fluctuating? i assume at 45 setting it should read 4500. mhz here, however its dipping to 4000mhz and up a bit here and there? noticing this now while running prime95
 
Last edited:
Mine did 5.4 with 1.5 if that helps? :D (don't try this at home)

My daily was 4.7 with 1.38 though, after 2 years I needed to drop it to 4.6 with the same volts though.
 
Acme said:
Mine did 5.4 with 1.5 if that helps? :D (don't try this at home)

My daily was 4.7 with 1.38 though, after 2 years I needed to drop it to 4.6 with the same volts though.
Click to expand...

Did you set that as fixed or work out an offset? Im playing with off set now but dont really know what im doing!
 
I used offset. :)

I just set a value for offset voltage and LLC and then checked the voltages in CPU-Z after booting, then go back into the BIOS and adjust accordingly. Repeat until the voltage is where I want it. :)
 
Acme said:
I used offset. :)

I just set a value for offset voltage and LLC and then checked the voltages in CPU-Z after booting, then go back into the BIOS and adjust accordingly. Repeat until the voltage is where I want it. :)
Click to expand...

can i ask what LLC is? (n00b :()

*just found it in bios, in the original guide i found i read to set this to 3 (out of the 1 to 5 and auto)

Not sure if its doing its job or not mind
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom