Asus M3A79-T Deluxe

[gOtVoltage]

hey..where you been?

I have ACC off right now. I am nervous with this board since it died a on me the first 2mins I had it running Phenom II. Right now only 2.8ghz on this thing. Here is a screen shot.

I feel left out not having a 940 yet...ACC is factored in on 940's.. Its not that much of a biggy any way.. Always check the temps and make shure the NB and Nbchipset has ample volts to keep up with the CPU. 940 will use lots less compared to our old B3's The voltage game still apply's to 920/940 AMD for High uber NB and CPU clocks above 4.0ghz.

Wow,, Crazy , i just realized (4.0ghz and AMD) in the same sentence has me scared, Now you know why i was hiding J/K

i couldn´t even post when i put in my phenomII. i had to clear cmos even though i set everything to default before i switched cpus.
i´m very tempted to spend another 250€ on a 940BE. Not being able to boot at 4ghz is driving me crazy...
i think i got a very strange cpu. 3.6ghz with 200x18 isn´t stable (2hrs16mins till core2 crapped out in prime). 3.7ghz 232x16 is 3hrs prime stable but at a voltage others use to get into windows at 4ghz... i just don´t get it...

First,,
Try to use the Highest CPU multi you can while using Stock NB/HT ..
OverClock while Only Raising the CPUvcore while using your max ram divider(800 or 1066) which ever ram you have.


What do you get?



Next ,,
Now try Adding some Volts to the NB on CPU and then raising then checking stability if by raising the NBvolts stabilizes things then clock some more.(920/940 use 1.35- 1.4v for NB to start) yes its safe to do . The 940 IMC is just like b3,, Actually its alot Better and uses less Volts for both CPU and NB.
This is a easy way to see if the Ram or IMC may be holding you back . By Raisng the NB volts it helps the IMC when the CPU goes up in clocks .In therory if your on the Edge of the CPU max this should make it stable. Most cases it does. Also Check the Temp of the CPU , this will hold you back too.


Note:
You should be able to Clock a little higher with a little More NBvolts compared to the First step (Raising CPUxmulti/htt while stock HT and NB is used)

As you do this balance act youll find that most of the time the NB likes a little voltage to keep things stable . Especiallywhen the CPU is going to the Moon. I always push the CPU first then Add NB volts to get more . Finally raising other things such as VDD and PCI0E Core Volts which is also Nbchipset on Mobo(1.32v)

Lots of people forget that the NB needs some extra volts too to keep IMC stable ..Just giving Vcore to CPU will not keep stuff stable ,Especially if going for that 4.0ghz and High NBmhz..

Also my old 9950 did not like high multi;s 17x was max,,but it loves High HTT for 3.55ghz/3.6ghz with 2600NB. I would treat 940 no different except for the HT which is actually Lower(3600 instead of 4000)

Is your HT too high above 3600 ?
This can give stabilty problems. If your going to be using insane High NB (2800mhz+) keep the HT close to stock for stability untill you know what is keeping you from getting more.

I wont have a 940BE for a little while yet , so i cant Post 940 results.

But i can tweak the crap outa this Asus 79-T and i am waiting for a optimal bios to go above htt300 with me 9950.

As long as you have good cooling or your temps arnt a factor push that thing.

1.5volts on the CPU is like a snack for these things

If anything you probally need more NBvolts / lower HT to 3600 / and set Core PCI-E to 1.32v.

hope something helps.

P.S if the NB is going above 2600mhz you will need to raise the NBcpuvolts for it Especially if you are going for 4.0ghz.

gOtVolTage

[charged3800z24]

I feel left out not having a 940 yet...ACC is factored in on 940's.. Its not that much of a biggy any way.. Always check the temps and make shure the NB and Nbchipset has ample volts to keep up with the CPU. 940 will use lots less compared to our old B3's The voltage game still apply's to 920/940 AMD for High uber NB and CPU clocks above 4.0ghz.

Wow,, Crazy , i just realized (4.0ghz and AMD) in the same sentence has me scared, Now you know why i was hiding J/K

Hey, I kinda know the feeling. I had to go out of town for work and was not able to play with my chip. Watching everyone posting results etc. I was not aloud at first cause of NDA appearently, and then wasn't around to post when NDA lifted. I got my 940 frre from work, so I kinda cheated.

I know, 4.0ghz with almost lil effort is crazy. just beeing able to run 3.8ghz @ 1.4v is crazy. I look forward to you get Phenom II. BTW thanks for the helpful info. Will play a round a lil more.

[MadDias]

First,,
Try to use the Highest CPU multi you can while using Stock NB/HT ..
OverClock while Only Raising the CPUvcore while using your max ram divider(800 or 1066) which ever ram you have.


What do you get?

on stock voltage i don´t get that much.. x16 is the highest stable multi on stock vcore.

i first thought the cpu or mobo doesn´t like high multis. but right now i´m 20mins into prime on 200x18.5/2.6ghzNB with 1.4875v/1.4vNB with my ram on the 1066divider. almost the same settings as in the screenshot in my sig only higher ram and nb speed.
it´s really funny that with phenomII u have to disable all the stuff that increased performance on phenomI.
cpu tweak is the most important. with cpu tweak enabled i can´t even get 3.4ghz stable. cpu prefetch is also disabled, as i don´t really know what it´s doing and it doesn´t help with performance.
both the ht and pcie-core volts are upped to 1.28V
cpu vdd is at 2.8V

4ghz is still a no go. maybe it has something to do with the sb750, as it always craps out when it´s trying to acces the hardisks (raid0 array).
but that´s still a long way to that magic 4. first i got to get 3.8ghz stable which always gives me irql_not_less_or_equal or other ram related bluescreens after a few minutes of prime.

[Titan7171]

on stock voltage i don´t get that much.. x16 is the highest stable multi on stock vcore.

i first thought the cpu or mobo doesn´t like high multis. but right now i´m 20mins into prime on 200x18.5/2.6ghzNB with 1.4875v/1.4vNB with my ram on the 1066divider. almost the same settings as in the screenshot in my sig only higher ram and nb speed.
it´s really funny that with phenomII u have to disable all the stuff that increased performance on phenomI.
cpu tweak is the most important. with cpu tweak enabled i can´t even get 3.4ghz stable. cpu prefetch is also disabled, as i don´t really know what it´s doing and it doesn´t help with performance.
both the ht and pcie-core volts are upped to 1.28V
cpu vdd is at 2.8V

4ghz is still a no go. maybe it has something to do with the sb750, as it always craps out when it´s trying to acces the hardisks (raid0 array).
but that´s still a long way to that magic 4. first i got to get 3.8ghz stable which always gives me irql_not_less_or_equal or other ram related bluescreens after a few minutes of prime.

Hey mad I just wanted to confirm how you did this.........Gotvoltage says to leave the ht and NB at stock then overclock using just the multi and stock voltage......once you hit your wall at stock voltage you raise the cpu nb voltage to see if it will stabalize......if it does you continue to move forward on the cpu speed until you need cpu voltage again lets say 1.4 or 1.45v till you hit the next wall then raise the cpu nb voltage again to see if it assists.

At least this is what I understood from his post.

First,,
Try to use the Highest CPU multi you can while using Stock NB/HT ..
OverClock while Only Raising the CPUvcore while using your max ram divider(800 or 1066) which ever ram you have.


What do you get?



Next ,,
Now try Adding some Volts to the NB on CPU and then raising then checking stability if by raising the NBvolts stabilizes things then clock some more.(920/940 use 1.35- 1.4v for NB to start) yes its safe to do . The 940 IMC is just like b3,, Actually its alot Better and uses less Volts for both CPU and NB.
This is a easy way to see if the Ram or IMC may be holding you back . By Raisng the NB volts it helps the IMC when the CPU goes up in clocks .In therory if your on the Edge of the CPU max this should make it stable. Most cases it does. Also Check the Temp of the CPU , this will hold you back too.

[MadDias]

Hey mad I just wanted to confirm how you did this.........Gotvoltage says to leave the ht and NB at stock then overclock using just the multi and stock voltage......once you hit your wall at stock voltage you raise the cpu nb voltage to see if it will stabalize......if it does you continue to move forward on the cpu speed until you need cpu voltage again lets say 1.4 or 1.45v till you hit the next wall then raise the cpu nb voltage again to see if it assists.

At least this is what I understood from his post.

that´s what i did. and the wall where i first had to up cpu vid was at 200x16.5.
erverytime i upped the multi again i also had to add cpu vid.
it´s not the first time for me

[Titan7171]

that´s what i did. and the wall where i first had to up cpu vid was at 200x16.5.
erverytime i upped the multi again i also had to add cpu vid.
it´s not the first time for me

No, I know that.......just checking

[gOtVoltage]

on stock voltage i don´t get that much.. x16 is the highest stable multi on stock vcore.

i first thought the cpu or mobo doesn´t like high multis. but right now i´m 20mins into prime on 200x18.5/2.6ghzNB with 1.4875v/1.4vNB with my ram on the 1066divider. almost the same settings as in the screenshot in my sig only higher ram and nb speed.
it´s really funny that with phenomII u have to disable all the stuff that increased performance on phenomI.
cpu tweak is the most important. with cpu tweak enabled i can´t even get 3.4ghz stable. cpu prefetch is also disabled, as i don´t really know what it´s doing and it doesn´t help with performance.
both the ht and pcie-core volts are upped to 1.28V
cpu vdd is at 2.8V

4ghz is still a no go. maybe it has something to do with the sb750, as it always craps out when it´s trying to acces the hardisks (raid0 array).
but that´s still a long way to that magic 4. first i got to get 3.8ghz stable which always gives me irql_not_less_or_equal or other ram related bluescreens after a few minutes of prime.

have you tried something like this,,






NOTE:
my 9950 on the Asus 79-T using 13.5x263 and 800ram divider..

Of course if you use the 14.5xCPU multi it would = 3.818ghz...you never Know . it just may like a 14x 14.5 or even a 15x using the 800ram divider. Dont pay attention to my Voltage,, Yours will be way lower @ 3.8 on a PH2.

[MadDias]

250x15=3750mhz @1.5v seems to be fine with the nb at 2.5ghz/1.4v
primed it for about 30mins, will try that again tomorrow.
my last try with 200x18.5 gave me errors in prime after 55mins.
i also tried going to 3.8ghz (254x15) on the cpu, but i either get a bsod or just a reboot at that frequency when i start prime.
going lower on the cpu multi and higher on htt doesn´t help.
i tried 267x14 to match 1066mhz on the 800 divider. but that´s giving me a bsod shortly after starting prime.

[Daveburt714]

Just a note for anyone who may be interested....

Since I installed my PhII 940 I've had one drive that kept clicking and failing during post (3 HD system). I actually thought the drive was failing and it was getting pretty annoying....

Yesterday I got the bright idea to bump the V's up on the southbridge to 1.22v's and the problem has completely gone away.

Just thought I would mention it in case anyone else is having similar problems.

[demonkevy666]

Just a note for anyone who may be interested....

Since I installed my PhII 940 I've had one drive that kept clicking and failing during post (3 HD system). I actually thought the drive was failing and it was getting pretty annoying....

Yesterday I got the bright idea to bump the V's up on the southbridge to 1.22v's and the problem has completely gone away.

Just thought I would mention it in case anyone else is having similar problems.

I'm only on one Hard drive and my sb volts are up to 1.34.

I can boot at 4.0ghz but it too refuse to get into winows with more volts temps are still low when this happens.

[Daveburt714]

I'm only on one Hard drive and my sb volts are up to 1.34.

I can boot at 4.0ghz but it too refuse to get into winows with more volts temps are still low when this happens.

FWIW Kevy, you may not need that much voltage on your Southbridge. Honestly, I've played with it before and it's never shown any big improvement by overvolting it (until now )...

Geez, even after a year of playing with Phenoms I'm amazed at how tricky these things are to overclock...
There are so many tweaks available it's hard to pin down which ones really help.

I'm sure it doesn't help that I keep changing parts though...

[MadDias]

I can boot at 4.0ghz but it too refuse to get into winows with more volts temps are still low when this happens.

same here. post on 4ghz is no problem. i even get to the bootmanager where i can choose which os to load (vista or xp). just for fun i chose the vista memory stability test (when i hit tab in the bootmanager i can choose this utility) and checked for ram errors at 4ghz without any problems.
but once i choose an os to boot i get a reboot immediatly.