Pushing my Opty a little further

sepulchre

sepulchre

sepulchre

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I have the opty in my sig and its been running without any problem for the last 3 weeks on stock volts at 2.8Ghz and 36C idle/42C full load (pap case cooling). On a 3/4 divider with mem at 200Mhz.

So i'd like to push it a bit further to 2.9 or even the magical 3.0Ghz I'm hoping this may be possible as its stable at the above voltages.

Whats the best way of ramping this up?

Thanks in advance.
 
Cheers Jimbo.

In the past I've had it boot into windows at 2.9Ghz but it wasnt stable (although I didnt touch any voltages etc) and when trying 300x10 on a 2/3 divider it would post but then fail straight away, again I didnt touch any voltages.

I'm still new to A64 OC'ing but 2.8 seemed easy to figure out and achieve as all I needed to do was set the mem to 200Mhz and apply a 3/4 divider. But to go from here I'm a little lost, for 2.9 would I be better using a different divider or increasing the mem frequency? (I'm guessing a different divider, but which?)
 
Thanks for the help!

I've left the multiplier as it is at the moment and made the following changes -

FSB 280 -> 290Mhz
CPU Voltage 1.376 -> 1.425v
Chipset Voltage 1.5 -> 1.7v
LDT 1.2 -> 1.3v

So I'm now running at 2.9Ghz and about to prime for a while.

I'll post back in an hour or so :D
 
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Ah I see, well the RAM's running now at 207 so not much over its ratted speed at 2-3-3-8 (had problems at 2-3-3-6 on SuperPi but slackening them relieved this).

The load temp is hovering around 49C, the PWMIC (I've no idea what this is!) is also at 49C, and the chipset's at 42C this is a bit of an increase over my load temps of 45C at 2.8Ghz. Although I've not found any chip that runs cool in this wavemaster case.

No problems so far on Prime, I know its not long but I'm happy not to have it error out like some people seem to very quickly :)

So do I go higher now?? And then do a thorough stress test?
 
Got it to 2.9Ghz at 1.4v. Each time I try and go much above this it locks up. I think this may be it. I'm a little hesitant to put any more volts through it as my temps are high anyway and its a good chip, not one I want to kill.

Unless anyone can convince me to break the 50C mark under load ;)

I'm going to stress test tonight at this speed.

Jimbo - LDT is at 3x
 
I think your right it could do 3Ghz, I'm currently using a new A64 Freezer pro cooler. Although I think the main issue is air flow inside the case (or lack of it).

Still 2.9Ghz isnt to be sniffed at ;)

edit/ isnt water cooling kind of expensive to get in to?
 
Nex, its interesting that we both have the same steppings and HSF and get the same temps, did you change the thermal paste of use the supplied stuff?

I'm trying to sort the case cooling but the wavemaster isnt great at getting air in. So far I've swapped the rear 80mm fan for a 120mm fan and enlarged the air intake holes on the front of the case. Next step I think is to put a 120mm fan on the side of the case to get some air in and over the main board. Once this is done I'll get back to a little more overclocking.

Mine was stable last night at 2.9Ghz on 1.4v, I've had it prime for an hour at 2950Mhz so I think there is still more left to come, but only if I can get some air in this case.

Thanks for the help guys :)
 
My corsair defaulted to 3-3-3-8 even though its true rating was 2-3-3-6. I've relaxed it to 2-3-3-8 just to get through SuperPi. But this cpu seems to run a little faster as each day goes by and also seems to do it a little cooler so I'll try again at the tighter timings, but not until i've maxed out the opty.

Mekrel - I'm having a great time with it now, after the initial hicups at christmas (none of which were the boards fault - damn twinmoss) it been brilliant! Takes a while to get to grips with the bios and its all a bit worrying at first (the will it go boom concerns etc) but I now I'm happily changing settings and enjoying the effects. Kind of adictive though :D
 
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