Help with O.C my i5 rig

[decrypter]

Hi all im new to these forums and wondered if any good experienced overclocker can answer my questions ty :)

heres my set up

mobo Gigabyte P55-UDR3
cpu Intel core i5 750 @ 2.67 ghz
Mem G.Skill RipJaw 4GB (2x2GB) DDR3 PC3-10666C8 1333MHz Dual Channel Kit
cooling Arctic Cooling Freezer 7 Pro REV 2

First question is i am after a mild overclock from 2.67 > 3.2 ghz

So i disable turbo boost and set my multiplier to 20x in bios
then i change the blck from 133 > 160

Will this ram handle 1600 mhz ? as its 1333 also i heard you can down turn the ram to make it 1333 but still o.c cpu to 3.2 ghz ?

im a total noob and dont wanna mess with voltages on either the cpu or ram

ty in advance cheers kev

[Toonshorty]

Even for that mild overclock I believe you'll have to 'mess' with voltages.

As long as you set it to 1.4000v vCore then you shouldn't see any dramatic change in lifespan, maybe 20 years down to 14 years or so.

I'm not familiar with the new Bclk system, I'm still on the 775 FSB.

[Terbinator]

Drop your RAM multiplier as low as it will go so its running at 800MHz. You should be able to leave turbo boost on if your aiming for a 4 core speed of 3.2GHz, i would recommend setting your Vcore to 1.3v-1.35v, maybe try with 1.3v and see how far you can get on that.

its probably best not to go near 1.4v with that cooler.

[mac124]

Nah you might do that on stock volts, you almost certainly won't need 1.4v i run mine at 3.33 on 1.2v iirc.

[decrypter]

Drop your RAM multiplier as low as it will go so its running at 800MHz. You should be able to leave turbo boost on if your aiming for a 4 core speed of 3.2GHz, i would recommend setting your Vcore to 1.3v-1.35v, maybe try with 1.3v and see how far you can get on that.

its probably best not to go near 1.4v with that cooler.


On my motherboard i am going to leave the voltages to auto as it automatically gets the right vcore

I am able to knock my multiplier on ram down to x6 = 800 mhz or x8 = 1066

so enable turbo boost and make the cpu = 21 x 170 bclk = 3.6ghz

make the ram 6x170 mhz = 1066 or 8x 170 = 1340 g skill report my ram is fine at 1500mhz + on stock timings n voltages

should be fine yes ? leave voltages on auto as it sets them for stabilty

[Terbinator]

On my motherboard i am going to leave the voltages to auto as it automatically gets the right vcore

I am able to knock my multiplier on ram down to x6 = 800 mhz or x8 = 1066

so enable turbo boost and make the cpu = 21 x 170 bclk = 3.6ghz

make the ram 6x170 mhz = 1066 or 8x 170 = 1340 g skill report my ram is fine at 1500mhz + on stock timings n voltages

should be fine yes ? leave voltages on auto as it sets them for stabilty

I thought you were aiming for 3.2GHz ?

Amyway, you do realise auto voltage will apply a lot more votage than needed - something you wanted to avoid originally ?

[mac124]

Leave them on auto if you want, but i agree it will use a lot more than is needed.

[RDRUNR]

Let us know how fast it goes when you are done. :D

[Shorttylad]

Drop your RAM multiplier as low as it will go so its running at 800MHz. You should be able to leave turbo boost on if your aiming for a 4 core speed of 3.2GHz, i would recommend setting your Vcore to 1.3v-1.35v, maybe try with 1.3v and see how far you can get on that.

its probably best not to go near 1.4v with that cooler.

Im at 1.42v I think it is, with that cooler and running well at 4.0ghz.. full load on blend tests giving me a maximum heat in the low 70s

[Shorttylad]

On my motherboard i am going to leave the voltages to auto as it automatically gets the right vcore

I am able to knock my multiplier on ram down to x6 = 800 mhz or x8 = 1066

so enable turbo boost and make the cpu = 21 x 170 bclk = 3.6ghz

make the ram 6x170 mhz = 1066 or 8x 170 = 1340 g skill report my ram is fine at 1500mhz + on stock timings n voltages

should be fine yes ? leave voltages on auto as it sets them for stabilty

Don't use auto, it gives more volts than needed so your CPU will be hotter than it needs to be- this could cause damage if it's going above the 80s.

One thing you CAN do if your unsure of the voltage to use for your CPU speed is to download and look at CPU-Z to find out what AUTO sets your voltage at for your given speed, and run tests on prime95, taking the voltage manually down bit by bit to see what the lowest stable voltage is (Don't forget to moniter the temps).

Not sure about what settings you should use as I got mine to 4Ghz with 1600mhz RAM..

Trying to remember - I think it was somthing like;

BLK 191
Multiplier 20
VCore 1.42v
Meaning the RAM is at 1555mhz and CPU at 3.8ghz
Turbo turned on brining the CPU up to 4.01ghz

[Shorttylad]

Even for that mild overclock I believe you'll have to 'mess' with voltages.

As long as you set it to 1.4000v vCore then you shouldn't see any dramatic change in lifespan, maybe 20 years down to 14 years or so.

I'm not familiar with the new Bclk system, I'm still on the 775 FSB.

I have read that the i5 750 can get to 3.2ghz no problem without touching the voltage

[decrypter]

Thanx for all the advice guys , im at 3.6 ghz on arctic cooling pro 7 but my temps are very high i think

ran prime 95 ---- 45 degrees idle and 89 degrees load i think these are too high

Sonna gonna stick with turbo boost and stock till i can afford a better cooler lol

cheers

[Shakeel]

dont know if this is going to help.

but my i7 860 went from 2.8 to 3.3 on stock after that i had to change the volts

as shortty lad said dont use auto.

[mark22]

I have my i5 running at 3.4GHz and 42 idle at 1.15V, definitely don't leave it on auto. When I change out the stock cooler for a Titan Fenrir it should be nice and cool at this level leaving plenty of room for higher clocks and maybe a bit more voltage.

[decrypter]

So keep booting and dropping the voltage untill it dosent boot up ? then go a tad higher ? im guessing a 3.6ghz O.C might be available on 1.2v ? On auto my current 3.6 ghz o.c it has the cpu @ 1.28v

[Callum1001]

I just OC my i5 last night to 4.0Ghz. I haven't run any stress testing yet, but I did play bad company 2 on full settings for about 2 hours last night and the temps didnt get over 45c :cool:. And it was as stable as anything. 120+ fps consistant

My settings were;

-Base clock is 191
-Multiplier is x21
-CPU Vcore @ 1.35
-CPU VTT @ 1.225
-CPU PLL @ 1.800

Everything below is turned off;

- Speedstep (EIST) and Turbo Mode
- C1E
- C-STATES


The rest of my setup:

Asus P7P55D-E
ATI Gigabyte 5850
Corsair 4GB Dominator PC3-12800
Intel X25-V SSD
750W Corsair CMPSU-750TX
Titan Fenrir cooler - with some messed up fan that makes a stupid noise! :mad:

[mark22]

Ok, got my Fenrir fitted and oc'ed to 4GHz.

BClk is 200, multiplier 20.

I turned turbo off to get here, might turn it on again after more stability testing.

VCore is 1.3V, could do 3.9GHz an 1.275.

Ram is at 1.6V and 2000MHz, it's Gskill ripjaw PC16000.

It passes intel burn test no probs and have done a few hours of prime last night but turned it off to go to bed as the fenrir fan was a bit loud on pwm control It runs at about 32 idle and 64 after hours of prime. Not bad I think and I might see how much further I can go but this will be my daily level I think. These chips are great!.