** OFFICIAL ** Core i5 Overclocking Results/Tips Thread

[miahallen]

Nice !, I am still looking for different brand 1156 maybe like Asrock P55 Pro look promising ? I like their layout board really neat with 3 smart buttons, can use 775 coolers and LED on board is a plus.

I know gigabyte p55m ud3 is good also.

BTW, I already tired of my old P45 775 Gigabyte UD3R.

dg

Theoretically, there is a substantial difference between 4 phase PWM and 8 phase...I'd say the extra $20-30 is worth it for OCing stability. However, the additional $80-100 for 12-24 phase is definitly not

A friend of mine did a nice comparison of a few low end mATX P55 boards recently, you might want to check it out before you buy the ASRock. He also was hoping that the ASRock would be mice and I think he had a slight bias towards it at the beginning, although his results told a much different story
http://www.ocforums.com/showthread.php?t=618867


I'm sorry to quote my own article here guys, but there really is no point in me writing all this again
http://www.xtremesystems.org/forums/...d.php?t=235289

So, a quick update to my stability testing on the i5 750. After hooking up my basic custom water cooling system...I was able to achieve slightly better results. I was stable for about 15 minutes at 4.45GHz, but impatient as I am, wanted to try to hit 4.5GHz...so I pushed up the slider a knotch and crashed it immediately. Luckly, I got a quick screen here:



Since I knew I was at the edge of Prime95 stability, and I wanted to let it run a bit longer for you diehard stability testing guys...I backed it off a hair and did about 100 minutes at 4.4GHz...not to shabby for a $200 quad



When I got home from work tonight, I found a nice new retail i7 870 waiting for me...thank you Gigabyte Japan While I was hoping for some sweet cherry picked ES or something...what I got was a retail CPU off the shelf...a quick glance at the box showed this thing is a very close relative of the golden i5 I've been playing with



So, out came the 750, and in went the 870....right off that bat, I'm impressed. Stable at 3840MHz WITH ALL STOCK VOLTAGES forced in the BIOS (auto overvolting is normal when Turbo mode is enabled)



A quick run at 4.2GHz shows that this one should also be a pretty decent clocker I'll be putting it under my F1EE in a few days.

[xdan]

A friend of mine did a nice comparison of a few low end mATX P55 boards recently, you might want to check it out before you buy the ASRock. He also was hoping that the ASRock would be mice and I think he had a slight bias towards it at the beginning, although his results told a much different story

If someone want to buy an Asrock P55 motheboard than they must buy at least P55-PRO(114$) http://www.newegg.com/Product/Produc...82E16813157171
It has a much better VRM(8+2 phases+heatsink).
A friend of mine just bought a P55-PRO+I7 860, +KINGSTON 1600C8D3K2/4GX an here is what he successeded for start...
http://valid.canardpc.com/show_oc.php?id=744001

Sorry if it is a little offtopic.

[xdan]

A friend of mine did a nice comparison of a few low end mATX P55 boards recently, you might want to check it out before you buy the ASRock. He also was hoping that the ASRock would be mice and I think he had a slight bias towards it at the beginning, although his results told a much different story

If someone want to buy an Asrock P55 motheboard than they must buy at least P55-PRO(114$) http://www.newegg.com/Product/Produc...82E16813157171
It has a much better VRM(8+2 phases+heatsink).
A friend of mine just bought a P55-PRO+I7 860, +KINGSTON 1600C8D3K2/4GX an here is what he successeded for start...
http://valid.canardpc.com/show_oc.php?id=744001

Sorry if it is a little offtopic.
Also here is another review of P55M-PRO, here they say they reached 4ghz(200 BKL) with an i5 750...stable
http://www.pcshoptalk.com/forum/show...=22181&garpg=8

So may be your friend just bought a defective P55M-PRO mb..it happens like the P55-UD6 "socket burn".

[miahallen]

Not a bad start for your freind...but he needs to crank his mem speed down a notch and push the CPU a bit further

[xdan]

He can also raise the multiplier to 22x to reach almost 4ghz...
Anadetch also made an review on P55M-PRO and P55M-UD2... They also reached 4100GHZ and 205BKL on P55M-PRO..
http://www.anandtech.com/mb/showdoc.aspx?i=3652
The vdroop an P55M-PRO seems to be big....
On the otherside what can you ask from an 99$ mb when only the P55 chipset cost manufacturers 44$....It is good at this price if it goes stock.. i mean stock voltage- 3.6-3.8ghz...

[radaja]

how was he able to raise the multiplier to x22?
i thought the 860 only could do x21 in turbo like the i7-920.

[miahallen]

Stock multi on the 860 is x21...21x133=2.8GHz (the 860's rated speed)...with turbo mode, the 860 will do more

[xdan]

Actually on 860 Turbo is up to 3.466GHZ(1 thread)http://processorfinder.intel.com/det...px?sSpec=SLBJJ
This stands for 26x ...

[miahallen]

Stock multi on the 860 is x21...21x133=2.8GHz (the 860's rated speed)...with turbo mode, the 860 will do more

I know...that's what I said

[radaja]

Wow!!so the turbo mode is a little different on these 1156 cpu's?
thats pretty sweet.thanks for clearing that up for me.

Edit-i was just checking some SS of i7-860 OC's
but i dont see no one using it,or does it not register
with cpuz since its only the first core?

[xdan]

Even 750 has turbo 24x, so in LGA 1156 you are not anymore limited by BCKL as 920 DO ..
I mean even with a cheap MB you can reach 200-210BCKL which is more than enough to reach 4.2-4.4ghz.

[radaja]

i didnt know this either.i only played with mine for a few hours.damn

[ninjagordy]

Hey dudes,

emailed the etailers regarding the issue requesting an rma and the dude came back with "sounds like a psu issue"...well, i have had that before but since im running a tagan bz piperock 1100w series i doubted that very much , but to humour him it tried a hyper 880w i have here....same ...different psu...lol...

once i stripped my rig i can physically see that some of the chips have popped.



as you can see circled in red here, at least 3 or 4 of these have bit the dust!!!

anyone else had or heard of this on this board??

cheers

Gordy!

[miahallen]

That is why guys who like to really push their overclocks should stick to mobos with 8+ phase VRM.

I'd try an RMA

[ninjagordy]

That is why guys who like to really push their overclocks should stick to mobos with 8+ phase VRM.

I'd try an RMA

dude...according to a good few reviews and a lot of other users of this board, i was by far not pushing it.

when the board failed it was running STOCK voltages with a fsb bump to 3.8ghz and the temps were well within the accepted parameters for the set up . under full load it was running in the low 70's on the cpu and the board temps were showing fine also.

i find it a bit unusual for 3 or 4 of the chips to fail at 1 go....

even on a budget board , i can see your point if i had been hammering it with some serious volts but according to many reviews i was far from it.

im still hoping i was unlucky and got a dud board....

fingers crossed!!

Gordy!

[xdan]

What board is this? P55-UM2?...
I think that the lack of heatsink for VRM is 50% to blame...
The fact is that your CPU even with stock voltage , if it is overclocked draw more power then stock frecueny...
From what i see it's better if you can to not buy these 99$ boards(Asrock or Gygabyte or MSI), it's better to spend 15-20$ more and buy at least Asrock P55-PRO(8+2 phases VRM+heatsinks) or P55-UD3R(same 8+2 phases VRM)...
And for 139$ you can buy the cheapest SLI P55- Asrock P55 EXTREME(8+2phases good cooling) ...which in my opinion is the best budget choice.

[miahallen]

ninjagordy...was the CPU on "stock" voltage...or "auto"...that's not the same thing

[xdan]

Yes , in deed the "smart" bioses can raise the voltake on Auto to 1.4-.15v even if you oc the CPU 300-400Mhz...

[ezaleina]

Hi all.,can i know why my system auto OC itself.,because i not do any changes in bios.,but when log into windows the cpuz shows 3.5Ghz..

[BSGOLD]

Because you have TURBO enabled.
Disable it if you don't want the overclock.

[ezaleina]

Because you have TURBO enabled.
Disable it if you don't want the overclock.

oic.,dunno about that.,new to i7.,just assemble it yesterday night.,btw tq..

[dctokyo]

This is a good read about The Perils Of Overclocking the cheaper P55 boards.
motherboard failed repeatedly from high VRM stress


http://www.tomshardware.com/reviews/...d,2436-15.html

Hey dudes,

emailed the etailers regarding the issue requesting an rma and the dude came back with "sounds like a psu issue"...well, i have had that before but since im running a tagan bz piperock 1100w series i doubted that very much , but to humour him it tried a hyper 880w i have here....same ...different psu...lol...

once i stripped my rig i can physically see that some of the chips have popped.



as you can see circled in red here, at least 3 or 4 of these have bit the dust!!!

anyone else had or heard of this on this board??

cheers

Gordy!

[ezaleina]

if i enable the turbo mode.,is it safe for 24/7 use..?

[miahallen]

yup, TURBO mode works fine when OCing...although higher multipliers didn't work for me under heavy overclocking.

On the 750, the x23 and x24 multis only worked at stock Bclock...once overclocked, only x21 worked.

Someone else said that you have to enable TURBO and EIST in the BIOS to get the higher multis to work, but it didn't work for me

[ninjagordy]

hey dudes, well
fair point on the auto voltages but in the same note....the cpu was at 1.36 whilst on auto.... intel are specing them for up to 1.4vcore.

i read the overclocking p55 budget board thread and thats a concern.....

i tested the chip on another board today and its gone as well....

im going to rma them both and hopefully get a maximus III formula genie and a replacement chip.

havnt heard anything apart from good things about the genie... should have just spent the extra and gone for a high end board in the first place but the ud2 was getting great reviews.....


ah well!!


ya live, ya learn!!

Gordy!!