Calculate your A64 overclocking potential

[vanrossum]

To nguyenquochuy:
Here's a pic with your curve plotted in. It looks like your oc at low voltages is a bit loose. Did you try to get out the most at low voltages? Are you sure your Ram is not limiting you there (other devider maybe)?

Maybe your z_ven get's lower then, maybe your z_ven->870....

[nguyenquochuy]

to vanrossum : RAM isn't the factor limiting me cos i adjust the divider at which RAM running at df speed (only oc cpu) !

It looks like your oc at low voltages is a bit loose.

maybe !......

thank guy !

sorry for my English !!!!

[s7e9h3n]

Ok, I decided to give this formula another shot at predicting my OC potential, but I think I've run into a little flaw. There has to be a range of working speeds that this forumla applies to, otherwise, it will give you an odd result. Once again, I'll use my Opty 154 as an example - 32m stable @ 3753, 1.648Vcore. I wanted to predict what my OC could be @ 1.7Vcore. Sooooo, the forumla works out as such:

Freq = 3753 + (1.700-1.648)*620 =

3785.24Mhz -> an increase of a bit over 30Mhz It may just be me, but that seems like a pretty small increase for that amount of Vcore.....

[vanrossum]

I'll use my Opty 154 as an example - 32m stable @ 3753, 1.648Vcore. I wanted to predict what my OC could be @ 1.7Vcore.

Freq = 3753 + (1.700-1.648)*620 =

3785.24Mhz -> an increase of a bit over 30Mhz It may just be me, but that seems like a pretty small increase for that amount of core.....

Try it out, I don't believe you will be getting out much more, I give you 40Mhz at most.
That's the gain of the formula! You don't need to start from scratch, with too high expectations, then decrease... decrease your FSB untill it gets stable again.

[s7e9h3n]

Try it out, I don't believe you will be getting out much more, I give you 40Mhz at most.

You mean 40mhz at this Vcore, or @ 1.70Vcore?

[chew*]

I think this would work IF all chips were equal.....But they arent......I had 2 manchesters x2 3800's one was a dud no matter what and one wasn't No math no magic just a plain dud. No amount of cooling, amount of voltage or amount of rubbing a magic lamp will get more out of it. And I would think I know what im doing......

[vanrossum]

You mean 40mhz at this Vcore, or @ 1.70Vcore?

Well if 3753Mhz is your best overclock @1.648V, I give you 40MHz at most @1.7Vcore. Try it out!...

To chew*: Therefore you insert your own (x,y), the dud line is parallel to the others, just a bit lower. Or is your IHS making bad contact? Than you have the cooling problem.

[chew*]

Well if 3753Mhz is your best overclock @1.648V, I give you 40MHz at most @1.7Vcore. Try it out!...

To chew*: Therefore you insert your own (x,y), the dud line is parallel to the others, just a bit lower. Or is your IHS making bad contact? Than you have the cooling problem.

One chip does 2.4 gig one does 3.0. There are way to many variables for this to work IMHO. Oh and the dud does 2.4 stock volts all the way up to 1.7.......Does not scale at all whatsoever no matter what board is used.....Contact is not an issue...