How to overclock on chaintech VNF3-250

[Darkshooter]

Hi

Recently i bought a pc

A64 S734 3000+
Chaintech VNF3-250
MSI 9800 pro ( i got the green but it says r350 core ? )
Corsair XMS Extreme Memory 512MB PC4000 DDR 500MHz
Diablo ATX 550w Dual Led Power Supply
ZALMAN CNPS7000A-ALCU
AEROCOOL JETMASTER ATX MID-TOWER CASE


It's a good boy

But i want him to be stronger buahaha.

Overclocking the video card might be easy. I reached 426 core without applying any thermal pasta.

Cpu temps are like 40 degrees in the bios and i have 5 fans ( 2 ps, 2 case, 1 cpu fan)
And not cpu temp is like 25. But when i put my hand in the case it seem really cooler than 25 ;P

Well i have a lot of questions on how to overclock on Chaintech VNF3-250 and i saw a lot of people here have similar setup. Links for guides on how to overclock would be great or telling me exactly what to do could be great aswell.

I wanted to say that i was planning to copy the values of this website overclock.
http://www.bleedinedge.com/rev...intech_vnf3250_08.html

Oh well im waiting for some answers thank you.

 

[Concillian]

NEVER just blindly copy overclocking settings.

Overclocking is HIGHLY dependent on the particular CPU. Just because one CPU makes a particular overclock does not mean every one will. Overclocking has to be done on a case by case basis.

1) Google is your friend. If you can't properly use google you probably shouldn't be overclocking
2) Download the proper tools. These include, at the very least: Prime95 and SuperPi
3) Find the limit of ONE thing at a time
a) memory
b) CPU
c) motherboard bus speed

in your case motherboard bus speed is likely not going to be a factor at all. Most nForce3 boards can easily run in the 280+ MHz bus speed range and higher.
memory should be okay, but that memory may not work quite the same an A64 board as the Intel board it is probably rated PC4000 for. I would still double check it can do 250 MHz operation in your board before just starting to run there.

For memory:
Lower HT multiplier to 3x this will be in Advanced Chipset options, not in Freq/Voltage control
Set latencies to what you expect to be able to get at your starting speed (in your case try rated timings for 250 MHz)
Set CPU multiplier down so CPU is not going to be a limitation at all. In this case, set the multiplier to like 7x so you are surely below rated CPU speed
Set bus speed = to RAM speed you want to test (250 MHz)
Run SuperPi as a quick test.
then up the bus speed buy 3-4 MHz and test SuperPi again. Repeat until SuperPi or booting fails.
drop down one or two steps then run Prime95 for at least 5 hours. Memory problems will generally show up in the first hour or two.
The highest speed you are Prime95 stable = your highest LONG TERM usable memory speed.

The CPU overclocking is similar, but there's no real quick test.
increase abit and a time and Prime95 under the 'small FFT' torture test. CPU failures by Prime95 can even happen after 8-12 hours. Longer you can go for testing the better. Initially do a couple hours of testing while inching CPU speed up.
Obviously when testing CPU overclock capability tou need to keep the RAM sonewhere it is known to be very stable. Drop the RAM divider int he RAM submenu of the Frequency/voltage menu in BIOS to 166 to ensure it's running well under what it needs to be stable.
For CPU overclocking, keep the multiplier on 10x and increase a few MHz at a time.
If you fail Prime95 you can either add some voltage and try again, ot decrease speed to last known stable point. Before finishing up, I run at least an 18-24 hour Prime95 session to verify my machine is good LONG TERM.
Always keep an eye on your temperatures On my chaintech board What is reported as system temperature is clearly CPU temperature, as it reads ~50C while I'm running a Torture test. Mostly you want to stay below 60C, but if you get much above that you'll start having Prime95 failures anyway. Sometimes it makes sense to run a little lower than totally max because you need so much voltage to get your absolute max clock speed.

It will probably take about a week of work to really find the max stable CPU / RAM overclock.

When you are done, increase the HT multiplier to 4x so that the HT speed is up towards the 1000 MHz range. Not really critical though HT speed isn't really a limiting factor. Also raise the RAM speed up to the highest you can get and still be stable. In your case this is likely to happen by setting the RAM speed to 'Auto', as your RAM should handle 1:1 at whatever speed you end up with at the 10x multiplier.

In my case, my 2800+ in my vnf3 is capable of around 2400 MHz at stock voltage with the Retail HSF. Most people top out their Newcastle core A64s in the 2400 - 2520 MHz range. So move in pretty quick steps up to the 2300 MHz range, then slow down to find your limit.

 

[Darkshooter]

Thanx a lot. Your post was really clear and i truly understand now

Keep up the good work