X2 550 Unlocking & Overclocking Consolidated

[RussC]

Yes, I tried higher voltages with 4 cores. I went as high as 1.4375V. Since Im on air, I didn't feel comforable going higher. I didn't try a real high voltage on the NB(1.15V max) since the MCP78S was getting very hot. Ive since put a fan on it, so I may up the voltage more later.

4 cores would boot OK, but would always lock system within 1-10min, no matter what I did with voltages or multi's. Starting P95 would cause it to lock faster.

One draw back with this board is FSBRAM multi's. You only get 3 settings, thats it. Not very good. For hard core overclocking, Id go elsewhere. I got this boards for 2 monitor system.

russC

did u try to up the voltage?

or straight away got ur motherboard, updated ur BIOS and tried unlocking?

what do you mean by "4 cores unlocked but lock up always?

im inteding to get that mobo with 710,will appreciate any information u could provide

thanks

[WSP]

Just got a new combo,
0922MPMW - RussC - ASUS M4N78 PRO - 1004 - Success

Success with caveot, with 4 cores enabled, will lock up always. Disabled one core with msconfig and 3 cores work fine. Ran prime95 for 7hrs overclocked to 3.5GHz and FSB 210, Memory 1:2 to 420MHz. Sill testing to see how far it will go. I also added a fan to the chipset IC, the nVidia MCP78S(GeForce 8200). This set is one IC for the whole motherboard. May give some more headroom for overcloaking. The IC gets very hot in normal running. I wonder why ASUS didn't put a fan on it.

This CPU was a good part on air(Zalman 9700) with 2 cores and was able to do a few benchs @ 4.0GHz before crash with no voltage uppers(super PI-1M @ 17.3s). So far this part doesn't seem to like alot of voltage. Ill post some pics later.

System:
AMD Phenom II 550BE
M4N78 PRO
2GB OCZ2N1066SR1G
Raid 0 2x WD Raptor 150GB
Antec 500W PS
Fan added to chipset nVidia MCP78S(GeForce 8200)

RussC

how do you disabled one core with msconfig?
I have an issue with my 550BE running unlocked to X4, maybe I should disabled one core?

thanks

[RussC]

run msconfig from command prompt, select boot menu, select advanced, uncheck number of cores, select 3. Apply and reboot.

RussC

how do you disabled one core with msconfig?
I have an issue with my 550BE running unlocked to X4, maybe I should disabled one core?

thanks

[kuniyo]

so did u update ur Bios?

does your motherboard come with on board nvidia graphics?

[RussC]

Yes to both, latest BIOS #1004 and the chipset by design is a 8300A video chipset. Check ASUS website, all the info is there.

RussC

so did u update ur Bios?

does your motherboard come with on board nvidia graphics?

[C-BuZz]

thread starter:any updates ?

there are already newer batches available...i called some of my stores in my country,they are getting week 29 amd phenom 2 x2550BE ones

I'll update this shortly. Been flat out

C-BuZz

[Andy_007]

Just got a 0924EPMW, will hopefully be testing in a few hours. Wish me luck

[HondaGuy]

Just came from the computer store they had a 550 there batch number 0926APMW

[Dark Star]

Someone please update the first post.

@hondaguy : Seems AMD will release B/C3 version soon

[Cele303]

I received new arrival in Croatia, 0926APBW and 0925CPMW, I will test them very soon... In the meantime, from my last post I had 0925APMW 4/7 success unlocks

[Andy_007]

0924EPMW -GA-MA785GM-US2H - F2 - Success. Stock speed@1.25V actual, 1.1750V set, will update later with overclocking

[HondaGuy]

550@ Quad NB@ 2996,,,,Ram Tracers PC-6400 @1141

[Cheeseball]

Crucial Ballistix Tracers DDR2-800 @ 550MHz! Awesome HondaGuy!

[Matas]

How much voltage runs through that 570 MHz Tracers?

[HondaGuy]

Thanks CheeseBall.....

The volts I had applied was 2.1 stock is 2.0

[Cele303]

0926APBW - Cele303 - Asrock A790GXH/128M - P1.20 - Success - Link
0925CPMW - Cele303 - Asrock A790GXH/128M - P1.20 - Success - Link

[RussC]

Got the screen snap shot of 3cores for the 550BE.
Just got a new combo,
0922MPMW - RussC - ASUS M4N78 PRO - 1004 - Success
See above post. 4cores still wont run under load. 3cores need NCC tweak in the BIOS to run stable under load @ -4% for the third core. Pic:


As seen, 3.6MHz stable with a very minor voltage tweaks. I bet this unit will run 4.0GHz with more voltage and water. I don't feel comfortable at 1.45 or 1.5V on air. Another big breakthrough along with fan on MCP78S chip was getting the covers on the Antec 900 box. Temps on the CPU dropped ~11F with covers, always put your covers on with high end boxes

Will do more testing to see if 3.7 or 3.8 is possible with this part.

RussC

[Cecil]

Just got a 550 and 790X-UD4P. Its unlocked and working at 3.6 now, with 1.5Vcore, and .2v added to NBv and NBvid. Fails OCCT Linpack after 10min. Temps are fine, speedfan, everest, and hwmonitor all report the same, 48C load.

ACC is set to auto -2% for all cores. Is there a guide anywhere on what the ACC settings do, and where they should be set?

[C-BuZz]

Op updated

C-BuZz

[eleeter]

ACC is set to auto -2% for all cores. Is there a guide anywhere on what the ACC settings do, and where they should be set?

I was wondering the same thing.

I have the same board as you. Forgot to document the production specs of the CPU. Don't feel like pulling off the HSF right now. I was running the chip@3.6 NB 2.6 all 4 cores -2%. Ran prime, OCCT etc. and all seemed fine. But sometimes the system blue screened, no real pattern to it. Sometimes it would run for hours, other times it would blue screen on boot up.

Lowered the NB to stock frequency and is running stable @3.6, NB VID and core at 1.325. I have crappy 800Mhz memory, never thought the chip would run this high with all 4 cores the system deserves better memory.

[SnakePriest]

when you unlock Phenom II 550 into Quad core and if you cannot boot into Windows make sure that you lower RAM frenquency.many unlocked chips have unstable ddr2 memory controller for 1066 mhz memory frenquency

[Seth-01]

Op updated

C-BuZz

Thanks for the update.

But you forget to add the success of unlocking my X2 550BE 0919 EPMW with my new mobo : Gigabyte GA-MA790GP-UD4H. and it's also ok with the Asus M4A78-E flashed with the last bios

To make it simple :

X2-550BE 0919 EMPW + Asus M4A78-E => success

X2-550BE 0919 EMPW + Gigabyte GA-MA790GP-UD4H => success

X3-720BE 0904 CPMW + Asus M4A78-E => fail (black screen and reboot)

You can add my results if you want. Thanks for all

[Seth-01]

Now here is my X2 => SUCCESS

AMD Phenom2 X2 550 BE stepping 0919 EPMW
Gigabyte GA-MA790GP-UD4H
Bios : F3

Screen

[img=http://img8.imageshack.us/img8/6576/x2x43718.th.jpg]

here is the screen

[marten_larsson]

The general consensus is that the PhII X2 550 unlocks on Asus M4A78E right (790GX + SB750)? (I'm probably ordering it tomorrow for my father). The X2 is still a great chip without the unlock but then I wouldn't have to buy such an expensive board (could easily save 50$). I'm most interested in rock solid stability @ four cores - 3,1GHz, 4GB DDR2 @ 800MHz - that's a huge upgrade from his single-cored Sempron

[Seth-01]

0926APBW - Cele303 - Asrock A790GXH/128M - P1.20 - Success - Link
0925CPMW - Cele303 - Asrock A790GXH/128M - P1.20 - Success - Link

Hi !! Is your 0926apbw stable with this frequency and vcore : 3800 and 1.36v ??? Thanks !