PII X2 550 OC'ing

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skier
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PII X2 550 OC'ing

Post by skier » Mon Mar 01, 2010 1:48 pm

so i got a PII X2 550 while i wait on what AMD is going to do with my Athlon II quad, last night i thought i should do a bit of overclocking before i went to bed, so i cracked open the window and got to it, heres what i got by ~2:15am(started at ~1am):

Note this is a RB-C3, its not the C2 Black Edition, im restricted to a x15.5 Multiplier or lower

4.2007 GHz
4.2.jpg
and lol @ 256C high temp ^
IMG_2824.JPG
^copied/pasted so it didnt have to be two pics, oh and pretend it says 271/4200 for a frequency, guess i forgot to change it off 272 when it bluescreened during boot, but the voltages and multipliers are all what i used for successful boot at 4200MHz

my 24/7 clocks:
247.jpg
it'll be a few days before i'm gonna start fooling with unlocking cores(though i'm 90% sure i can turn it into a quad)

guess in both screens i also forgot to make the last CPUz windows set to the GPU haha
Last edited by skier on Mon Mar 01, 2010 5:11 pm, edited 1 time in total.
-Austin
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Re: PII X2 550 OC'ing

Post by Apoptosis » Mon Mar 01, 2010 2:53 pm

wow...4.2Ghz! Very nice
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Re: PII X2 550 OC'ing

Post by Darkstar » Mon Mar 01, 2010 4:48 pm

wow is right!

sweet!

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Re: PII X2 550 OC'ing

Post by TexasScott » Tue Mar 16, 2010 9:22 pm

I have read the 550 is a very good overclocker but never saw any numbers... 4.2ghz is great.... :shock:

Hope you can get the other 2 cores unlocked....good luck.....

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Re: PII X2 550 OC'ing

Post by Dizz01 » Wed Mar 24, 2010 2:45 pm

So this isn't the BE? I have the AMD Phenom II X2 550 BE and right now I'm at 3.9ghz with an x18.5 multiplier. Am I doing the right thing here? Should I change my multiplier down and frequency up? It runs stable at 3.9 but I'd like to see if I can stretch it to 4+ on air. Any suggestions on what I should change?

Side note I tried to run the ACC on my Asus board and my machine rebooted with no luck >.< bummer I guess I'll have to wait til the 6 core and just use that lol
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Re: PII X2 550 OC'ing

Post by skier » Wed Mar 24, 2010 3:50 pm

well actually black editions are much easier to overclock as you can leave it at ~200MHz bus and crank the multi as you give it more voltage(for 4.2GHz i was pushing 1.675v Vcore and it wouldnt boot at 1.7, dont go up to this high voltage at first, start at like 1.5 and get your highest freq. there, then bump the voltage one notch and go as high a freq there and so on)

from what i see for extreme overclocks(4->6+GHz) most people were using a bus of between 200-210MHz and letting the multi do all the work, only one or two people have used a bus higher than i did with a 550, one being 425x15.5 which is the only recorded C3 higher than mine(but thats on LN2 so temps around like -100C ) looks like a lot of people have gotten 20x~205 or 21x~200 at around 1.55v though with the C2's. definitely not a guarantee that you'd be able to, just what some people get with their specific setup, temps are a HUGE factor too, my stock cpu idle temps were around 18C when i started(the 550 does run really cold)

i'm currently at 15.5x246 1.5v stable. 263x14.5 1.55v used to work but just kinda stopped a couple weeks ago, but now i have a higher RAM speed and HT link
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Screamin' BCLK: Image
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
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Re: PII X2 550 OC'ing

Post by geokilla » Wed Mar 24, 2010 5:10 pm

Any luck with unlocking yet?
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