O/C AMD 64 3000 Venice

[redskull]

I'm new to overclocking AMD64.

 

I have an AMD 64 3000 Venice.

 

Can someone reply with a safe (maybe 2300mhz) overclock setup. The memory divider thing confuses me.

 

I have the DFI Ultra-D NF4 board and a gig of Samsung PC3200 ram. I have a good 485w Enermax PSU.

 

Please post what I should do in the bios for just a basic O/C... I read the guides but the memory divider and HTT is confusing.

 

Once I see and example of settings I think I will understand more.

 

Thanks

[vega27]

hey, man! plz review the forum rules and follow the instructions. only then can we help you.

[redskull]

ok i read them, now what? did i do something wrong?

[vega27]

hmm, that didn't really say you need to create a signature, did it? well, you need to create a signature containing all the things you just said like cpu, memory, power supply, speeds, voltages, etc. don't worry about being TOO specific, the more detailed, the better. that way, everybody can see your rig everytime you post. cool.

 

p.s. my sig is prolly the most useless around here :tooth: but i just like it! so i guess i need to practice what i preach!

[redskull]

Ok, now can u help?

[vega27]

nice. have you read the stickies in this overclocking forum, especially thunda's A64 overclocking guide?

[redskull]

Yes, but I find the memory divider thing confusing. I'm just looking for an example of a overclock. Like what the htt, divider, multipler etc... would be set at. That may be in there and I missed it though.

[vega27]

what are the stock timings for your RAM?

[redskull]

2.5,3,3,8

 

I want an example of an overclock that would bring it to 2300mhz, but leave the ram working at 400.

[astaris]

If you want 2300 Mhz, then the HTT has to be:

HTT = 2300/9 = 255 Mhz

because 9 is the max CPU multiplier of your venice.

 

Now the real HTT frequency is:

HTT*HTT_multi

The default HTT multi is 5x and the nominal HTT frequency is 1000 Mhz. You have to set your HTT multi to satisfy the relation:

HTT*HTT_multi<=1000-->HTT_multi<=1000/255=3.9

So set your HTT multi to 3, or set it to 4 and increase your chipset voltage and ldt voltage by 0.1V.

 

Now you want your RAM at 200 Mhz. Let's find the right Memory Divider.

You can use this relation:

Memory_divider=(200/255)*200=160 Mhz

Now on DFI you have 166 and 150 divider options.

If you use the 166 divider you ram frequency is:

Ram_Freq=Cpu_Freq/Ceil(Cpu_Multi/Ram_Ratio)=255*9/11=209 Mhz

If you use the 150 divider you ram frequency is:

Ram_Freq=255*9/12=191 Mhz

So if your ram can do 209 Mhz use the 166 divider, otherwise the 150 divider.

 

Anyway you have to test what voltage your cpu requires to run at xxxx Mhz.

And don't forget to tweak the memory timings.