2500K turbo boost overclock

Mariusmssj

Mariusmssj

Mariusmssj

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Joined
2 Dec 2008
Posts
213
Location
Cardiff
Hey guys i has couple of questions to ask.
first off specs:
Intel i5 2500k
Gigabyte P67A UD4-B3
corsair vengeance @ 1600mhz

Should i overclock the base multiplier on my 2500K or the turbo boost multipliers ???

And if i only overclock my base multiplier to lets say 40 = 4000Mhz will it effect the turbo boost too? because the turbo boost atm is 37, 36, 34, 34 will they change if my base multiplier is higher?

thanks
 
hiya mate

with the i5 2500k if you set the mutiplier to 40 it will go into turbo mode and kick up to the 4000mhz speed on all 4 cores,
however when idle it will still be go down to 1600mhz to save power :) its called Speed step i think

im using asus board so not 100% how to overclock using that gigabyte one,

what cpu cooler are you using?

i was pretty nervous when i started overclocking (today lol) but i've learnt a lot in couple of hours :)

Programs liek cpu-z , CPUID and Real temps can give you more information about whats going on with voltages/temperatures etc i recommend them, they help a lot to see whats going on when overclocking.

good luck!
 
well it's not my first time overclocking BUT first time working with turbo boost, it's still witchcraft to me xD

i got prolimatech megahalems rev b
Prolimatech%20Megahalem%20Rev.%20B%20for%20Intel%20775%20%201156%20%201366-5_enl.jpeg


so oc'ed the base clock instead of turbo boost clocks?
 
Make sure you have the latest cpu-z otherwise the vcore is incorrectly shown due to it displaying the vtt instead on that board. Latest version is 1.57.1 off their website and shows vcore correctly.
 
Liquid said:
Make sure you have the latest cpu-z otherwise the vcore is incorrectly shown due to it displaying the vtt instead on that board. Latest version is 1.57.1 off their website and shows vcore correctly.
Click to expand...

aa cheers =] i just clocked it to 3.5Ghz

but now i am running idle system so why is my multiplier still 35, shouldn't it be 16???

unledr.png


and when pushing further should i increase the max tdp???
 
Ignore Max TDP that won't change, thats just what the stock cpu is rated at..

Don't change the base clock/bus speed at all. With sandy bridges its all done via raising the multiplier and vcore. Also stay below 1.4v for 24/7 use, more sandy users will post in here to help you im sure when they see the thread.
 
heres some settings to test with

Ai Overclock Tuner - Manual
BCLK/PEG Frequency - 100

By All Cores (Can Adjust In OS)

Turbo Ratio – 47
Internal PLL Overvoltage - Enabled

Memory Frequency – what ever yours are rated at MHz

Load-line Calibration - Ultra High
Phase Control = Extreme
Duty Control = Extreme

CAS Latency - what ever yours are rated at
RAS to CAS Delay - what ever yours are rated at
RAS Pre Time - what ever yours are rated at
RAS ACT Time - what ever yours are rated at
DRAM Command Mode - what ever yours are rated at

CPU Voltage - Manual Mode
CPU Manual Voltage - 1.35v

DRAM Voltage - 1.5v

VCCSA Voltage - 0.9v
VCCIO Voltage - 1.0v

prime95 blend on these for min 12hours make sure you watch your temps dont go above 78. if you bluescreen change to 46 (insted of 47) and drop your load lin calibration to high (not ultra high) see how you get on any other problems post back.

as for speed step i wouldnt bother with it unless youve just built a pc to idle for 95% of its life i run mine at 4.7ghz 24/7
 
ohhh ok then so if i start with 40x multiplier and increase my vcore a bit, does this mean that will automatically change my turbo boost multipliers too?

because i don't want them to go all bonkers because at stock 33x base multiplier the turbo boost multipliers are 37, 36, 34, 34
 
yeah when you change the multi it will make the turbo boost multi the same on all 4 cores,

my multi is 44 and all cores go to 4.4ghz when stressed

how are your temps looking ?
 
my i5 2500k @4.4ghz 1.3v is showing temps between 54-60 after an hour of prime 95 blend test,

i tried kicking it up to 45 multi but even with 1.32v fails prime95 , a lot of what im reading is saying keep voltage below 1.35v for 24/7 usage and im pretty close to that now,

gonna try tomorrow 45 multi and maybe 1.34v see if that works,

I dont think i've got great chip tbh some people are getting upto 4.8ghz on 1.3v and im just about getting 4.4ghz : (

4.4ghz might be my "wall" a lot of people are talking about, having to increase voltage large amount to climb over it.

Oh well 4.4ghz is still a good boost in speed :)
i'm glad i went with k version of chip rather than the normal one :)
 
Ahhhh so Turbo should be left on? I have turned it off on my MSI P67A-G45-B3 and just manually set 45 (with no other changes to voltages other than manually setting DRAM MHz and voltage to 1.5) for multiplier so it's 4.5GHz all the time. Was wondering why my idle temps were up to 45 all the time :p


So basically leave turbo on defaults as well as turbo multiplier as the main cpu multiplier takes priority and Turbo will kick up to 4500Mhz when required while dropping to 1600MHz when idle?

BTW, I've also disabled C1E and EIST, should these be left on too?
 
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not sure what c1e and EIST are :P, im using asus motherboard

but yeah mine goes
idle : 1600 mhz idle around 30C
turbo: 4400 mhz around 60C

we are basically overclocking turbo
are you getting 4.5ghz at stock votlage? thats very nice :D
 
munz said:
not sure what c1e and EIST are :P, im using asus motherboard

but yeah mine goes
idle : 1600 mhz idle around 30C
turbo: 4400 mhz around 60C

we are basically overclocking turbo
are you getting 4.5ghz at stock votlage? thats very nice :D
Click to expand...

Yes I've left the voltage on default (auto?) ;p

CPU-Z reports 1.336v - almost 1337!

EIST/C1E are usually in the power savings sections. My P45 mobo had them too and that was AWARD bios!
 
Sounds like speedstep or turbo here is the same as it always was. It lowers the multi when the speed isnt needed.

Throttlestop program will do this other cpu even when its overclocked


Does anyone use or try even the onboard graphics for these new fancy chips?
 
How do you use onboard graphics when the moo has no graphics port? :D

I'll be re-enabling Turbo and power saving features tonight :P
 
upto you mate some people have it in turbo mode all time :P

i keep the speedstep on, to step down to 1600mhz when idle , keeps things cool,
uses less electric aswell i think :P

there normally option in bios saying something like "INTEL speed step technology" i kept mine enabled.

still cant seem to get 4.5ghz stable : /

@Khaan! you are on 1.336 voltage so not stock :P but still good mate :)
 
Ah it must be adjusting it automatically then!

According to Coretemp my VID is 1.38v so it's well within VID.
 
@khaan! what motherboard are you using?

im using asus p8p67-m and..well...its not very easy to overclock it :P

next time i'll definately go for gigabyte/msi one i think they seem to be a bit easier to OC.
 
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