PhenomII 720X2 max volts

[deshepherd]

What's the max vdd anyone thinks is sensible for prolonged usage (i.e. not boot windows and run prime for an hour!) for a 720X3? I think AMD officially quote 1.425V ... but I've seen lots of overclocks where people are using 1.5V and above.

 

[gt_junkie]

Not 100% sure but i'm on 1.42v for 3.4ghz - if i ever decide i need a higher clock i will probably go to 1.5 max as i'm running on water.

Have heard of some on 1.55v watercooled.

gt

 

[goujon945]

Yeah under water you could get away with higher but on air I would stick to 1.4 ish

 

[Bleek]

Well 1.55v is within spec but I'd air on the side of caution and stick to 1.5v max unless you're using water, in which case 1.55v should be fine as the chips run pretty cool.

 

[deshepherd]

Well 1.55v is within spec but I'd air on the side of caution and stick to 1.5v max unless you're using water, in which case 1.55v should be fine as the chips run pretty cool.

? according to info on AMD's web site its

Voltages 0.850-1.425V

I'll probably stick to this. Just upgraded my cooling to an Arctic 64 and that's certainly brought down the temps so I may push a bit further ... however my overclocking in any case is currently going backwards as I've started running the "stability test" in the AMD OverDrive utility and while I'd been able to run Prime for hours without problems I've been getting errors on this within 30mins at the same freq/voltage.

 

[EvilOne]

I would prob goto 1.5 on air, 1.6 on water. Just make sure the temps are fine and you shouldnt have any problems.

*edit* AMD chips seem to like high volts more then Intel ones, so mabe even higher if temps are still good.

 

[gurusan]

1.6v? :/

 

[Bleek]

Tolerance should be in the region of +/- 10%.

If temperature is controlled I cannot see any reason 1.5v would cause any problems. If we're talking ultimate life then sure, it'll be reduced, but that said the life cycle of modern a transistor is substancial - we are talking years, if not tens of years.

 

[ecat]

1.5v looks safe enough. Looking at temperature rise, idle to load, and power draw, I think my 720 starts to look 'uncomfortable' around 1.575v, under water.

An interesting read on electromigration, the long term effect of higher voltages:

http://en.wikipedia.org/wiki/Electromigration

 

[littlepuppy]

Im running 1.475 and temps are fine, as people have allueded to on here, AMD chips are much more tolerant of voltage increases than intel.

 

[markiejt]

im 1.425 at 3.5ghz, was running at 1.4825 fine before but decided to lower as extra 100mhz wasnt worth extra volts in WOW

 

[deshepherd]

im 1.425 at 3.5ghz, was running at 1.4825 fine before but decided to lower as extra 100mhz wasnt worth extra volts in WOW

Similar story for me ... got 3.3GHz with 1.375V, 1.45V gets me to 3.5GHz and 1.475V seems to get 3.6GHz. Will probably step back to 3.5 or possibly 3.3. Switch from stock cooler to Artic64Pro last weekend and temps don't seem to be an issue any more! With open case I'm struggling to get past 35C!