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Help me overclock athlon 2 X2 240

post #1 of 15
Thread Starter 
Hey guys..

Im a noob when it comes to cpu overclocking.. Ive overclocking my gpu by changing vcore levels and stuff with no problems.. Here are my specs and problems..

I have an athlon 2 240 running at 2.8 GHz on a cheap biostar 785ge mobo.. Also one of the bottlenecks is im running cheap transcend DDR2 memory.. Most guides here show overclocking for DDR3.. The fsbX multiplier is 200X14..

I'm using a zebronics pro 500w PSU and the stick cpu cooler..

Im also looking for a moderate stable overclock of 3.4 - 3.5 GHz..

Here are my questions...

1)My DDR2 memory runs at 400Mhz does that mean i can push my fsb upto 400?? How much do i underclock my memory to??

2)What is this deal with HT? Im not sure but i read my HT in the bios was 2Ghz.. not too sure.. Shud i reduce this??

3)What about the northbridge??

4)Shud i use bios to overclock or is there some better tool?
    
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post #2 of 15
Can you give us your rig specs? put it in your sig, or post it here
post #3 of 15
Thread Starter 
^^Just did..
    
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post #4 of 15
Hi, sorry about the lack of answers, i expected people to jump on this, now i got some time, i'll help you.
Your FSB speed isnt the same as your RAM MHZ..
you only do 1 part at a time. you start with the CPU first. this CPU isn't multiplier adjustable, so we need to do it via the FSB. now, 200x14 is 2800 (2.8ghz), so to overclock, bring the FSB up by 5, so it's 205x14, brings it to 3.05GHZ. now, if it boots into windows, run a 1 hour prime95, and if it passes and your not happy, do another 3 hours. Now, if it doesnt boot, or doesnt pass prime,you need to up the voltages, most likely by 0.05 voltages at a time, eg, stock is 1.20, you whould bring it up to 1.25.

Now, you rinse and repeat that process until it is not stable, eg, if you hit 3.5 ghz, not booting into windows, put 0.05, still not, most likely that is your MAX oc.

With the RAM, that's a different story, a CPU OC will help you in the meantime. do NOT oc the RAM AND THE CPU at the same time, it makes troubleshooting a nightmare!

I expect rep for this wall of text (jokes mate)

By the way, reading the whole thing, i'll answer it all.
Leave the northbridge for now, you need to research your safe voltage limits for the NB and the CPU, and keep under them. if you hit a wall with your OC, you need to progress to upping the voltages a tiny bit for the NB

If you need more info, just search for HOW TO OC AM3/Am2+ CPU
Edited by SpeedNuggeT - 12/20/10 at 2:31am
post #5 of 15
Make sure to drop the ht, north bridge and memory multipliers down before pushing up the reference clock.
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Koru
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post #6 of 15
^^
missed that out since he has a bad board
post #7 of 15
Thread Starter 
Quote:
Originally Posted by jacobthellamer View Post
Make sure to drop the ht, north bridge and memory multipliers down before pushing up the reference clock.
By how much? and how much will performance suffer? This is my major question rilli.. dont have probs with the procedure of ocing as such..
    
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post #8 of 15
Thread Starter 
Update : teting in incerements of 5mhz.. running prime..
I decreaded nb and ht to 1.8Ghz from 2 ghz stock..

Q: How do i decrease memory freq?? This is the thing im worried bt.. im using cheap memory.. DDR 800.. right now running at 420mhz from default 400...

ALso.. I increase vcore only when FSB only fails rite?
    
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post #9 of 15
youre taking a risk with that psu.first,running a 5750,ocing it,then,ocing your cpu too.ive seen zebronics blow up(mine did,on stock that too.luckily nothing else got damaged),its a matter of time or luck before yours does.dont go too far with the oc.
    
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post #10 of 15
Thread Starter 
This is a 500watt pro model.. which one was yours??
    
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