Overclocking with ASRock 939Dual-SATA2

[vtp]

Alright first of all I am pretty new to over clocking.

My goal is to overclock an Athlon 64 3200+ to 2.4 or 2.5 ghz.

I was hopping to get some help from you guys. This is what I know so far:

I am pretty out of the loop, back in the old days we used to OC Celerons with changing the mulitplier. Now it seems that everyone is messing with the FSB. Here is the link to the ASRock 939Dual-SATA2 bios screens. If you could use this to step me through the process I would greatly appreciate it.

Here is a link: http://www.phoronix.com/scan.php?page=article&item=355&num=4 Bios screens.

As I understand it I must first lock the PCI-e and AGP slots. I do this by selecting "CPU,PCI-E ASYNC" from this screen: http://www.phoronix.com/images/picture.php?id=355I=asrock_939dual_bios4_lrg and setting the PCI-E bus speeds to 100 mhz. Now no matter what I do to the FSB, the PCI-e and AGP speeds will be unchanged. Right?

Secondly, I up to the voltage to the max this mobo allows. Change it to 1.450 on the same screen as above. (this mobo only allows .05 voltage ramp) Right?

Now this is where my understanding of the concepts and the actually completing of the proccess diverge. If I want 2.40 ghz CPU clock, with a 10x multiplier (which is what I am locked to with the 3200+) then I want a FSB of 240. But I can't have my ram running at this speed correct? So I must use the memory divider? Set it to about (5/6) that should give me roughly 200 mhz ram speed which is perfect? (Similarly if I want do do 2.5ghz, at 10x multi, I would want 250 FSB and a divider of (4/5) correct?)

Where in the BIOS would I do this? What would it be labeled as and how will I imput the values that I want?

What about ram latancy? Is that called "CAS Latency" in the BIOS? If so,should I leave it at auto? If I change it, what do I change it to? I heard something about 1T, what is that? Where do I change that?

Lastly, Now I have to adjust the HTTlink so that its below 1 ghz right? Stock mulitplier is set at 5? If I want to run 2.4 ghz, FSB will be 240. So again I have to change it to 4x right and deal with a loss in speed of: 1000-940 = 60 mhz? Similarly if I wanted to go to 2.5 ghz CPU clock my FSB should be 250 and a mulitplier of 4x would be perfect ast 250x4 = 1 ghz right?

Where would this multiplier option be found? How do I change that? Will 1.45 volts be enough to sustain 2.5 ghz CPU clock? If not, where can I get the program needed to raise voltage?

Thanks for all your help in advance guys. I really appreciate it.

~Vu

 

[vtp]

HELP??!

 

[SynthDude2001]

You seem to be going in the right direction. 1.45V will indeed be the maximum voltage available on a Venice chip by default on this motherboard.

If you want 2.4GHz, you will need to set the RAM speed/divider to 166MHz (assuming PC3200 RAM), which would lower the speed back to 200MHz (166/200 * 240 = 200), you have that correct. In the standard BIOS you will only have 133, 166, and 200MHz RAM dividers, so you will have to play around to see what gets you the maximum RAM speed without running higher than your RAM can take it, but without dropping to a divider that puts you significantly below 200MHz. If you want to do 250x10, the 166MHz divider would have your RAM running at 207.5Mz, which is usually no problem for PC3200 RAM. You will probably want to set the RAM voltage to High (in Chipset Configuration) if you're going to be running the RAM a little over spec.

I would recommend that you leave the latency settings at default (you can always tighten timings later once your overclock is stable); CAS Latency is only one of the settings you can change. 1T command rate doesn't make a whole lot of real world difference, and doesn't seem to be entirely stable on these motherboards, so I'd not worry too much about it. If you want to though, it should be called "MA Timing" on the same page where you change CPU speed settings.

You have the right idea with the HTT multiplier too. As far as I've seen so far (in my own experience and reading), dropping below 1000MHz overall HTT speed is not detrimental to system performance. This option in the BIOS is called "CPU-NB Link Speed" on the Chipset Configuration page, and you will change it to 800MHz for a 4x multiplier, or 600MHz for 3x (for above 250MHz CPU/"FSB" speeds). 1.45V should be enough for 2.4GHz, and probably enough for 2.5 as well. To my knowledge there are no options for adjusting Vcore in software (above what the board will provide in the BIOS), if you want more than 1.45V you will have to do a voltmod. I can give you more information about that if you're interested.

Hope this help somewhat.

 

[KBTuning]

pull back on the NB to CPU multi, i think thats what its called, and set it to 800mhz to start w/, then goto your ram settings and change your ram speed to DDR333, now bump up the FSB to about 225 and start there. i got my 3000Winni up to 265x9 and got about 2.35GHz at 1.45 volts.. youll find out fast that this mobo needs more voltage and it can do it you just have to "mod" the board.... someone will chime in w/ a link to all this crap... its really easy once you figure it out....

 

[OhioState]

Originally posted by: KBTuning
pull back on the NB to CPU multi, i think thats what its called, and set it to 800mhz to start w/, then goto your ram settings and change your ram speed to DDR333, now bump up the FSB to about 225 and start there. i got my 3000Winni up to 265x9 and got about 2.35GHz at 1.45 volts.. youll find out fast that this mobo needs more voltage and it can do it you just have to "mod" the board.... someone will chime in w/ a link to all this crap... its really easy once you figure it out....

here is the linky sir
vcore mod
http://www.ocworkbench.com/2005/asrock/reviews/939dual-sata2/vcoremodguide1.htm

vdimm mod guide
http://www.ocworkbench.com/2005/asrock/reviews/939dual-sata2/vdimmmodguide1.htm

have a wonderfull night

 

[deals99]

Some great info in ocworkbench's faq

 

[vtp]

Thanks guys, you don't know how immensely helpful you have been.

~Vu

 

[Markfw]

I can only get 1.40 vcore on my X2 3800+. Is that all this mobo will let me do ? that sucks as OC board if true.

 

[solgae1784]

Yes, dual cores are limited to 1.40 Vcore unless a Vcore mod is done. Sad but true.

 

[designit]

Radioshack sells soldering gel for $4. Yu apply a small amount and then heat it and it melts to solder.
You can heat n gas stove a needle or a thin metal like coat hanger and touch the jel to melt.
very low heat solder and appears to be very easy. I dont know if it has same property as conductive paint or not, but it might be conductive without melting it.
This compound is easy and cheaper than conductive pen.
You could also do the rebel's forum mod w/ a resistor. a 15K resistor will give you about 10% increase and safer than 10 or 15% increas using lower resistors. a 10% increase will give you: 1.45*1.10=1.60v vcore which is safe enough. Rebel's mod can be removed but OCWforum mod will stay even if you unsilder the VID/SGND. people have reported this. below is the link. make sure read the thread very carefully and ask polygon or members there to know what resistor give what. but dont do both vcores combined (ocwforum and rebel's) a good chance to fry cpu if both mods and on board.
http://www.rhcf.com/sisubb/ultimatebb.php/topic/30/29.html