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Power Supply culprit behind instability???

Last response: in Overclocking
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December 30, 2004 5:12:11 AM

Well, i've been experimenting with ocing my shiney new A64. The system will boot at 2.6ghz, but i only have stock cooling, so it runs to hot. Anyhow i'm shooting for 2.4, i can only get it to run about 3 or 4 hours on Prim e 95 at 1.5vcore, but even though its set at 1.5vcore asus probe reads as 1.44~1.424vcore and my 12v is only reading at 11.1v. I have a antec true 380, rated for 18amp on 12v, 30amp on the 3.3 and 35 on the 5v(the 3 and 5v lines rateing could be reversted, can't see the sticker). I've heard that for overclocking to these speeds i should have at least a 450watt with 20amp+ rateing on the 12v to get stable power. From my description does it seem like a PS inadequicy?

Asus A8V Deluxe(rev. 2.00) / A64 3000@2.4(266FSB, Mult. 9x) / 1024mb OCZ DDR533 / BFG 6800GT@405/1100 / Baracuda 120GB / Lian-Li PC-65 / Syncmaster 700NF / Antech True 380
December 30, 2004 5:49:20 AM

Here you go, got this from another post (THGC)<A HREF="http://www.jscustompcs.com/power_supply/" target="_new">http://www.jscustompcs.com/power_supply/&lt;/A>..Power Wattage Calculator.

also read this<A HREF="http://forumz.tomshardware.com/hardware/modules.php?nam..." target="_new">http://forumz.tomshardware.com/hardware/modules.php?nam...;/A>

I dont know how to Calculate the increase due to oclocking?
I dont think that oclking would add more than say 30% of the cpu at norm

!#&$ <font color=blue> :eek:  </font color=blue>---<font color=red><i><b>It's not heavy,...it's my computer</font color=red></i></b>
December 30, 2004 1:27:03 PM

Yah i suspect the PowerSupply. Its under a 335 load at any given time, that is NOT includeing the 400mhz(2.4ghz x9, 266FSB at 1.525vcore) overclock and the higher voltage mod on my GT. Plus the 12v is only seeing 11.1~11.2 volts wich would deffinately cause instability in oc, as well as the vcore only seeing 1.44v of the 1.525 its set at. thx for the linky.

Asus A8V Deluxe(rev. 2.00) / A64 3000@2.4(266FSB, Mult. 9x) / 1024mb OCZ DDR533 / BFG 6800GT@405/1100 / Baracuda 120GB / Lian-Li PC-65 / Syncmaster 700NF / Antech True 380
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December 30, 2004 8:57:35 PM

That 12v rail is below the +-5% range if it goes as low as 11.1v . Either a POS or got too much load on it and needs a bigger one.

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December 31, 2004 1:20:51 AM

You'd have better luck with a Fortron Source 350W, but even that would be too marginal for any comfort probably.

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