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Help OC'ing Athlon 64 3500+ Venice

post #1 of 19
Thread Starter 
Hi, I have a very small knowlege of overclocking and was wondering if I could get some help/advice in overclocking my CPU. All the stuff I know about my system is in my profile I think but basically my CPU is running at stock speeds but has an Artic Freezer Pro slapped on it so it's idling about 25 degrees which seems a sensless waste of potential overclocking power . There was a piece of overclocking software that came with teh motherboard but some people I spoke to said it's best done from the BIOS.

Any help is greatly appreciated, i'm a bit nervous about overclocking it since I don't really have any idea what i'm doing and don't want to fry anything . Thanks.
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Hades
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post #2 of 19
first thing is to lower the ram speeds and timings, then start upping the bus speed. up in 5-10mhz increments and test for 10-25mins on each oc till you get the sweet spot you want to stay at. after you get a stable cpu oc then move on to the ram and then you can tighten up the timings. also with a 939 try to not let the ht link to far over 1000 if it goes to far over it can cause in unstable oc. to change this lower the ht link down to 3x or 4x.
sorry for the lack of detail hope this helps
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post #3 of 19
I'm more of an intel person but to get you started,you should post processor speed ,voltage etc .and download cpuz. Cpuz will give you all that info when you run the program .It'll also be in bios [hardware monitor]Get cpuz n post a screenshot or tell us what it says.
    
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post #4 of 19
This may sound daft, but I believe that overclocking is not something done haphazardly (especially if you only have one machine). Therefore, it's best to first accumulate as much knowledge as possible before starting out.

Read as much on the subject as possible. Accordingly, I've linked you to some of the more helpful AMD64 OCing guides I know about.

Link 1 (One of my personal favorites)

Link 2

Link 3

A must-read for AMD64 OCing

There is also a S939-specific club here on OCN, the link to which is in my sig. Feel free to jump right in and ask the growing number of club members there about any specific issues you might encounter.

Hope this helps, and good luck.
    
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post #5 of 19
Thread Starter 
Here's the screenshot of CPU-Z I took. I would also add I'm not sure about how to adjust memory timings :s

Hades
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post #6 of 19
Thread Starter 
So what should I do first? If I change the FSB (say increase by 10 to start with) do I need to change the multipliers at all?
Also, do I need to change any of the memory settings because I read that you need to change the PCI and RAM speeds as well if you are changing your CPU speed. Here's a screenshot of the options available in my BIOS OC'ing section (the values here aren't mine, this is taken from the mobo manual).


Thanks
Hades
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post #7 of 19
Start with a DDR333 RAM setting for now, we'll get you more on the RAM later
Your HT Frequency, set it to 4x (or 800). You want to keep the default "5x200=1000" aka the 1000 overall speed under about 1100 or you'll get instability. So, if you get past a CPU speed of 260 you'll have to drop to 3x (600).
BTW, you may find the "HT" multiplier showing as 1000 for 5x, 800 for 4x, 600 for 3x.

As said, increase the CPU bus speed from 200 slowly and test for stability with Orthos, Prime 95 or OCCT... either will usually error out in the first 5-156 minutes if you need to make changes due to speed setting or voltages.

Later on the RAM we'll get into the possibilities of voltage increases and timing changes.
For now, the DDR333 settings will likely allow you to up the CPU OC to about 250 safely. Why you ask Because when you set the RAM to DDR333 or utilize a "divider" your RAM is under clocked about 83%. So when you increase the CPU speed, the RAM also increases only about 83%. So a CPU speed of 250 x .83 = a RAM speed of about 207MHz multiply that x2 and you have about DDR414. What is with the "about'' all the time, the CPU multiplier used screws with the RAM divider math a little so its rarely exact.

Back to the CPU, as you increase the OC and perhaps find instability, increase the voltage to the CPU a notch. BUT, do watch your full load temperature and keep it below the mid 50c range!
    
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post #8 of 19
Thread Starter 
Ok thanks I will try this when I have some free time in the next few days. If you don't hear from me again it's because my PC burst into flames and took me with it
Hades
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Hades
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post #9 of 19
Slowly will usually avoid the flames
Seriously, take your time, have patience and watch the full load temps.
Those will also likely prevent crashing the systems which requires a BIOS reset and help to avoid corrupting the OS.
    
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post #10 of 19
Thread Starter 
Cool, so basically I don't need to touch the memory settings (there doesn't actually seem to be an option in the BIOS anyway). I just need to increase the CPU slowly until I get a good, stable speed. I probably need to change my CPU fan settings as well since they are set to run quite slowly at the moment cause the CPU is at low temps. Thanks.
Hades
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Hades
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