Ga-ep43c-ds3 420 fsb barrier

vanquish_80

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Feb 9, 2009
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Hi everyone,

does anybody have an idea why this board have a limit on 419 fsb or I do something wrong.

my system
ep43c-ds3
q9550 2.83
patriot 2*2 ddr133
ati 4870x2
sb x-fi professional
700w psu

I have tried every possible voltage values but no good. it just doesn't post over 419 fsb and restarts.
bios latest f4
thanks in advance
 

blashyrkh

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Jul 4, 2007
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Maybe it's an FSB wall you're hitting. I have the same board but I never had to go this high up hte FSB. At 333MHZ I hit 4Ghz easy. But, I use a 5200 which has very high multi at 12,5X, which is awesome!!
Try going 421 or 422 and repeat in small increments. This board is very good OCer so maybe if you bypass 420 it will work. Also try giving a bit higher voltage on the northbridge. Be careful though. The NB is passive cooled and get really hot. Try adding a fan
 

4745454b

Titan
Moderator
I think what Blash meant was you might be hitting a hole, not a wall. With an FSB hole, the system can go faster, but it might not be stable at 420-440. Go in increments of 10, and try for 430, 440, and 450. If no luck with any of these, that might just be the limit for your system.

What ram do you have? DDR what? What latencies do they have, and what settings are you running with them?
 

erocker

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Jul 2, 2006
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Only a 4 pin CPU power connector on that motherboard for the quad core processor generally isn't the best for overclocking. If you want to overclock, you should get yourself a P45 board as the P43's aren't really an enthusiast chipset.
 

vanquish_80

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Feb 9, 2009
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thanks for qick replies.

my ram ddr3 - 1333 working at 10-10-10-25 2T

vcore 1.28
dram volt 1.80

the rest are auto
I tried different voltages but board and memory doesn't want more values on those areas. for vcore even I put 1.32-1.35 but on tests continue working max 1.26. all cpu protecting controls are off ( also tried on).
If I put more than 2.00 from dram also not posting. Max i saw on tests using 1.74.

I tried et6 on windows. same as bios. upto 419 no problem. as soon a touching 420; it locks comp. yes I tried fsb 430 and 440, also no good. probably erocker is right. just a wrong choice f board.

thanks
 

theAnimal

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Jan 21, 2009
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AFAIK you cannot run your RAM slower than your FSB. What RAM speed does it say in CPU-Z?
 

4745454b

Titan
Moderator
By using the right divider, you can run your ram slower then your FSB. It tends to run slower then if you were using "FSB speed" ram. This is the 3.2, which is he divider. For the record, you don't multiply 419 by 3 because he's using DDR3. Its DDR, or double data rate. Just like with DDR, and DDR2, you only multiply by 2.

If he's got 1333, and its running at 1340, it shouldn't be his ram.
 

theAnimal

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Jan 21, 2009
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AFAIK the 1:1 divider in Gigabyte's BIOS is called 2.0, so 3.2 should be higher than that.

And DDR3 is multiplied by 4. 333FSB = DDR3 1333
 

RJR

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Jan 7, 2009
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First, take your memory out of the equation.

Lower your divider to 2.0 (1:1), keep it at stock volts & timings.

Bump up your vcore to 1.3625v in your Bios, set your NB voltage 1.3-1.4v and then raise your FSB. See how far you can go. Keep an eye on voltages and TEMPS.

Then worry about pushing your ram after you figure out your max FSB speed.

In other words read this, it may help:

http://www.tomshardware.com/forum/240001-29-howto-overclock-quads-duals-guide

Then when your finished start slowly lowering your voltages and testing to find your lowest STABLE overclock.

Have fun.