***The Official Phenom II Overclocking Thread***

[ecat]

3.6 @ stock is a good start. Keep us updated

 

[Bleek]

Good start!

I've just ordered a 720BE to play with, and a OCZ Vendetta cooler as my Arctic Freezer Pro is now a bit oldskool.

If I can get my 720 to 4GHz I'll probably sell the 940.

 

[EvilOne]

Wish my Q6600 would do 3.6 @ stock volts and be that cool

These chips are too tempting

*resists*

 

[ecat]

Good start!

I've just ordered a 720BE to play with, and a OCZ Vendetta cooler as my Arctic Freezer Pro is now a bit oldskool.

If I can get my 720 to 4GHz I'll probably sell the 940.

So tempting to buy another 720BE just for the hell of it, possibly a working 4th core too . And if I could get my 720 to 4GHz I'd stop dancing naked at midnight in the back garden, promise.

 

[Bleek]

Well my 940 ran at 3.8GHz on stock volts, I've only tweaked it very slightly to run at just over 4GHz, so I have high hopes for my 720BE... it'll arrive tomorrow so stay tuned for Saturday's results.

 

[littlepuppy]

OK, running at 3.6 but needs 1.4v

Lets try 3.7...

 

[littlepuppy]

Looks like I can ge the 3.8 but need to increase voltage to around the 1.47 mark and I dont want to do this as the CPU starts to use a lot more power for minimal gain So I think - for now... Ill sit at 3.6

 

[deusexlumina]

ahh i cant even get mine stable at 3.6 atm =( whenever i change anything to diwth with ht speeds it just hates it, and it wont boot properly at 3.6 even at 1.425v if i just raise the multi, any thoughts?

 

[ecat]

ahh i cant even get mine stable at 3.6 atm =( whenever i change anything to diwth with ht speeds it just hates it, and it wont boot properly at 3.6 even at 1.425v if i just raise the multi, any thoughts?

As far as the CPU is concerned the only real limit to the CPU voltage you can use is your cooling - with air cooling, so long as the load temperature is less than 55C you should be safe. The proviso here is that your psu and mb should be up to the task.

If you hit this limit, or simply don't want to push the voltage higher, the next thing to try is increasing the 'Processor-NB Voltage'. See table 4 in Dolk's guide

http://www.ocforums.com/showpost.php?p=5985635&postcount=7

This 'Processor-NB Voltage' relates to the on chip memory controller so it is still a voltage supplied to the CPU, just not the main processor core. As such increasing this voltage will have some effect on overall CPU temperature and extreme tweakers may lower the CPU voltage a little to compensate, but I think you'd have to be near the ragged edge to require this compensation.

The final thing to try is to reduce the CPU multiplier to the best stable value, or possibly 0.5 less, and compensate by increasing the FSB frequency. When initially playing with the FSB it's also a good idea to reduce the 'Processor-NB Frequency Multiplier', 'CPU-NB HT Link Speed' and possibly the RAM divider to keep these within spec.

Read Dolk's guide again, especially post #4. There's a lot of good information to be found
http://www.ocforums.com/showthread.php?t=596023

 

[gareth170]

ahh i cant even get mine stable at 3.6 atm =( whenever i change anything to diwth with ht speeds it just hates it, and it wont boot properly at 3.6 even at 1.425v if i just raise the multi, any thoughts?

1.5v is safe amd says, but u need a good cooler.

what cooler u using?

if its an aftermarket cooler, i would say up the voltage to 1.45 or 1.475v then u should hit 3.6ghz even maybe 3.7ghz. or try upping the CPU-NB voltage to 1.1875 V

 

[Bleek]

Just playing with my 720 X3 now, are these not the coolest chips ever? 20.5'c at idle!

 

[Bleek]

3.4GHz on 1.25volts so far - undervolted and overclocked.

System temp is 23'c.

I'll see how far it'll go undervolted.

 

[Bleek]

3.5GHz on stock.
3.6GHz requires 1.4v.
3.7GHz requires 1.425v.

At 3.7GHz it idles at 23.5'c, bloody amazing.

All using multiplier thus far.

http://valid.canardpc.com/show_oc.php?id=522190

 

[Bleek]

[email protected]/[email protected]/2400HT/ DRAM 960MHz -
http://valid.canardpc.com/show_oc.php?id=522222

Idle at 21.4'c... !

edit:

[email protected]/[email protected]/2230HT/ DRAM 992MHz -
http://valid.canardpc.com/show_oc.php?id=522222

 

[deusexlumina]

As far as the CPU is concerned the only real limit to the CPU voltage you can use is your cooling - with air cooling, so long as the load temperature is less than 55C you should be safe. The proviso here is that your psu and mb should be up to the task.

If you hit this limit, or simply don't want to push the voltage higher, the next thing to try is increasing the 'Processor-NB Voltage'. See table 4 in Dolk's guide

http://www.ocforums.com/showpost.php?p=5985635&postcount=7

This 'Processor-NB Voltage' relates to the on chip memory controller so it is still a voltage supplied to the CPU, just not the main processor core. As such increasing this voltage will have some effect on overall CPU temperature and extreme tweakers may lower the CPU voltage a little to compensate, but I think you'd have to be near the ragged edge to require this compensation.

The final thing to try is to reduce the CPU multiplier to the best stable value, or possibly 0.5 less, and compensate by increasing the FSB frequency. When initially playing with the FSB it's also a good idea to reduce the 'Processor-NB Frequency Multiplier', 'CPU-NB HT Link Speed' and possibly the RAM divider to keep these within spec.

Read Dolk's guide again, especially post #4. There's a lot of good information to be found
http://www.ocforums.com/showthread.php?t=596023

thanks for the advice, that guide looks pretty damn good, when im back from work ill see how much further i can push it im quite new to overclocking these so a lot of the options are new to me as well, but ill have a fiddle with the NB voltage and see if it helps

 

[deusexlumina]

1.5v is safe amd says, but u need a good cooler.

what cooler u using?

if its an aftermarket cooler, i would say up the voltage to 1.45 or 1.475v then u should hit 3.6ghz even maybe 3.7ghz. or try upping the CPU-NB voltage to 1.1875 V

ahh i see i was getting a bit worried at 1.45 becuase it seems pretty high, especially seen as my old athlon ran much hotter at 1.35 lol, but ill see if 1.5 makes any difference as well, temps seem ok, still under 50 on load with a thermaltake blue orb as cooling, so theres definately still some headroom i think

 

[Bleek]

Just been working on a fast stock volt setup. So far I've managed:

3.5GHz/2500MHz HT/250NB/DRAM 980MHz.

31'c under load here. Idles at 21.5'c. OCZ Vendetta II cooler.

I don't see why I'd need anymore than that for the time being, I might try and find the 3.75GHz voltage sweet spot tomorrow.

Might try a 4GHz high volt run too.

 

[gareth170]

ahh i see i was getting a bit worried at 1.45 becuase it seems pretty high, especially seen as my old athlon ran much hotter at 1.35 lol, but ill see if 1.5 makes any difference as well, temps seem ok, still under 50 on load with a thermaltake blue orb as cooling, so theres definately still some headroom i think

just make sure u keep it under 60c..

http://products.amd.com/en-us/DesktopCPUDetail.aspx?id=509&f1=&f2=&f3=&f4=&f5=&f6=&f7=&f8=&f9=&f10=

 

[Bleek]

Can people run the AMD Overdrive benchmark and post up their scores?

 

[Bleek]

My AMD bench gets 10,905.

http://valid.canardpc.com/show_oc.php?id=524172

720BE @ 3.8GHz/2.15HT/238NB/1.48v/16x multi.