Screwby25

Hey guys, just in case some of you guys are over on extremeoverclocking.com, I am posting this here as well, just so that I can get as much helpful feedback as possible. Thanks!

First off, I'm totally new to the overclocking thing. I just bought a Phenom II x2 545 with an Asus 785 MB. Well for starters, it seems that I have the one "dud" that can unlock all the other cores. My guess is that I have a failed Quad that's officially a dual only... Does that make sense? I've tried enabling ACC to "auto" but I can't seem to get the other cores unlocked. As of right now, a simple overclocking has netted me 3.17ghz, which I know is like nothing. The only thing I've really touched in BIOS was the CPU/HT Reference Clock changing it from 200-211. Also, I bought DDR2 1066 memory, however the MB picks it up as 800. Now, I know that I can go into BIOS and change it manually, which I have tried. I would change it to 533, but it seems that Windows XP SP3 doesnt like to boot up for some reason. Is there something else I have to do here? Do I have to change the voltage on the RAM?

I installed CPU-Z to get a better look at the whole picture.
Right now
Core Speed: 3165 mhz
Bus speed 211 mhz
HT Link 2110 mhz
Core Voltage: 1.3v
Memory timings: 5-5-5-18-24-2t
Memory Voltage: 1.8v
DDR2 DRAM Freq: 422 mhz (I think as a result of increasing the CPU/HT reference clock)
FSBRAM ratio: 1:2

Sorry for being such a newb. I've tried reading the How-to-overclock threads, but all of the information is too technical to me. If there is anyone who can give me an easier explanation as to what values I should be inputting and what not, that would be great. I'd like to get this guy running well.

Oh here's another little tidbit, I'm still using an older HD that uses an IDE connection.. could this possibly be of hinderance?

Thanks in advance!

flowtek

hi,

running 533/1066 strap will brings you above the ram spec if you overclocking through HT/Busclock, you should use 800 strap so when you set 211 on bus the ram will go 422/844 (cpuz)

heres you can try,.. set bus to 250 and multi to 14 (3.5Ghz) also brings down HT multi x8 and x9 for nb, set ram at 800 in bios (it will go 500/ddr2 1000) with 1.9v, give it as much as 1.3 - 1.35v vcore and you set to go, if it boots then better to check stability with prime95 blend (least 1 hour) or linx 20 passes for a start, then you could try to lower vcore if possible


g'luck
flo

Screwby25

Ok I'm going to try what you suggested.. I haven't done it just this instant, but I just want to mention that the CPU's multiplier is locked. I dont have the Black edition.
THanks for your advice!

Hujeros

I have the same CPU an 2x2048MB A-Data RAMs stock 800MHz.
I run now on 3,75GHz with 1.280V . Try this settings :

CPU Multi : Auto
NB Multi :10x
HTT Multi : 8x
RAM : 800MHz (4x)
RAM Timing : Auto
RAM Volt. : 1.95V
NB Volt : 1.20V
CPU-NB Volt. : 1.25V
CPU Volt. : -0,25V or Normal

all other setting on Auto, its deppendin on your MB too. I have GB, i dont knou yours MB settings possibility.

CPU-Z Vallid : http://valid.canardpc.com/show_oc.php?id=812216
Some testing :

Temps : 45° in Burn (core1 and core2 in Everest about 33°)

i wish you good luck :-)

flowtek

you have 15x multi if im not mistaken, i think you can lower it to 14 for a start with 250 busclock

thats a very nice overclock you have there , since you use only 1.28v i can imagine pushing it to at least 4.0ghz with ease

happy tweaking
flo

Hujeros

i try 4G but its unstable with 1,55V. For 3,9G i need more than 1.40V and for 3,8G stable i need 1,325V.

4G valid : http://valid.canardpc.com/show_oc.php?id=805185

i am happy now with this OC 3,75 with only 1,28V rock stable.

Screwby25

are any of you guys familiar with the overclock features in the Asus motherboards?
If you do, that would be great help.. I tried setting up the values the way you suggested, but I had not much luck with it.

Thanks for the help

Screwby25

anyone help please?

fsjis1

Memory timings are difficult, but this is important. tRFC if wrong can cause instabilities, and most of the times isn’t set correct for 2gb sticks in the bios. here is how it should look.
tRFC 105ns 512Mb
127.5ns 1GB
195ns 2Gb
recommended with AM2/AM2+ sockets anyway.

Also what is your memory rated at voltage wise? my experience tells me that if you have 1066 your memory is probably rated at 2.1v, but you should check that. From my understanding 1066 isn’t a JEDEC memory spec, so when the bios looks for the spec it sees ddr2 800 as the spec and sets it to that. I understand this happens because the required voltage is beyond spec, it is usually somewhere around 2.1v for 1066.

So find all the specs on your memory, it is usually on the box that the memory came in, sometimes there is a sticker on the side of the stick with this information as well. You should see something like 4-4-4-12-28 these are important. They are specific for the sticks rated speed. In your case your rated speed is ddr2 1066 or ddr 533 however you want to think of the speed.

I created this document for myself. It might help you it might not. http://picasaweb.google.com/lh/photo...eat=directlink

If I were you I would drop my memory speed from ddr2 800 to
666 or 533 rated speeds, this will help remove your memory from the equation for instability, (still adjust your tRFC though). After you figure out how far you processor will go, then you can start adjusting your memory specs back to their rated.

Another suggestion is to use AOD AMD
OverDrive http://www.amd.com/us-en/0,,3715_153..._15359,00.html
to overclock, sure its not bios overclocking, but the nice thing about it is that if you push your parts to far, its reset to normal when you restart. Thus you don’t have to continue to reset the cmos.

In the upper right hand corner of AOD is a green button, this is essentially enables and disables amd cool and quiet. this took a while for me to figure out. anyway I hope this helps