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Phenom II steppings and max OC 550-940 - Page 103

post #1021 of 2829
-Phenom II 940BE
-CPU stepping: CACVC AC 0805BPCW
-Revision: RB-C2
-CPU: 3.718GHz , 286 x 13
-CPU voltage: 1.4875v
-CPU-NB voltage: 1.45v
-Northbridge clock: 2574MHz (no NB volt setting..)
-HTT link speed and voltage: 2574MHz @1.28v
-motherboard: ASUS M3A79-T Deluxe
-motherboard BIOS revision: 602
-type of cooling: air

CPUZ validation number: 505574
http://valid.canardpc.com/show_oc.php?id=505574
Edited by Bleached - 2/11/09 at 5:29pm
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post #1022 of 2829
Found this on XS,

Nice OC using the Foxconn Destroyer

Persons name is:

-Radiant-




4.2ghz

Not bad for an Nvidia Chipset ( Soon i will have my Phenom II )
post #1023 of 2829
Thread Starter 
Quote:
Originally Posted by NickF View Post
Currently I'm running 3.51GHz at 1.408v. My chip is being rather weird, as if it give it more than 1.425v it becomes unstable, therefore I cannot get anything more than 3.5GHz to even boot into vista. Even running at reference 200MHz its not stable at anything above 3.5GHz. Its just not making sense that more voltage is making it less stable. I checked my PSU with a multimeter, the 12v, 5.5 and 3.3v rails are all spot on.

I have stepping CACVC 0850 BPCW.
Northbridge clock (2106MHz @ 1.35v)
HTT link speed (2106MHz @ 1.25v)

pic
pic

pic
pic

http://valid.canardpc.com/show_oc.php?id=505550
Try to lower your HTT Multiplier, maybe your board doesn't like a high htt and NB speed.
Don't forget that giving too much voltage will let your system crash too, it's better to have too little voltage to start with, where you can add voltage to gain stability. If you hit the stability, you can move up by raising the cpu-MP or the htt-bus.

I'm running 3.6GHz 24/7 with 200x18 @ 1.425V. I need an additional 0.05V to hit a stable 3.7GHz en another 0.06V to hit 3.8 stable.

When putting 1.53V on the 3.6GHz OC doesn't mean it's stable, where it does when using 1.425V.


@gsk3rd: Did u run those tests without the Mainboard cooling yet?

@think3r: Look at the first page, there you will c our steppings.
Edited by XenoMopH - 2/12/09 at 6:39am
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post #1024 of 2829
Quote:
Originally Posted by XenoMopH View Post
Try to lower your HTT Multiplier, maybe your board doesn't like a high htt and ND speed.
Don't forget that giving too much voltage will let your system crash too, it's better to have too little voltage to start with, where you can add voltage to gain stabillity. If you hit the stabillity, you can move up my rasing the cpu-MP or the htt-bus.

I'm running 3.6GHz 24/7 with 200x18 @ 1.425V. I need an additional 0.05V to hit a stable 3.7GHz en another 0.06V to hit 3.8 stable.

When putting 1.53V on the 3.6GHz OC doesn't mean it's stable, where it does when using 1.425V.


@gsk3rd: Did u run those tests without the Mainboard cooling yet?

@think3r: Look at the first page, there you will c our steppings.
I ran some prelim stuff but nothing concrete. I am actually having cooling problems with my TRUE. I have reseated some many times I think I need to clean the HS and cpu with some alcohol. My first seat after lapping I was idling around 28c now I can not get below 31c. Once I get a free moment I will do some actual tests on the NB. I did put 1.5v to the NB and cpu and the VRs were not as hot as they have been to the touch.
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post #1025 of 2829
Quote:
Originally Posted by XenoMopH View Post
Try to lower your HTT Multiplier, maybe your board doesn't like a high htt and ND speed.
Don't forget that giving too much voltage will let your system crash too, it's better to have too little voltage to start with, where you can add voltage to gain stabillity. If you hit the stabillity, you can move up my rasing the cpu-MP or the htt-bus.

I'm running 3.6GHz 24/7 with 200x18 @ 1.425V. I need an additional 0.05V to hit a stable 3.7GHz en another 0.06V to hit 3.8 stable.

When putting 1.53V on the 3.6GHz OC doesn't mean it's stable, where it does when using 1.425V.


@gsk3rd: Did u run those tests without the Mainboard cooling yet?

@think3r: Look at the first page, there you will c our steppings.
Solid advice, the best way to overclock these chips is with finesse rather than 'brute force' voltage increases. You might be stable at a given cpu frequency with say, 1.45v, but that does not mean it will be stable @ 1.5v even though 1.5v is > or equal to 1.45v. Sometimes more voltage is actually a bad thing, even if you're under your thermal threshold.

So really the best way is to start at stock, determine what your maximum oc is with stock voltages, and move on from there.
Edited by Drin - 2/12/09 at 7:44am
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post #1026 of 2829
Thread Starter 
Quote:
Originally Posted by Drin View Post
Solid advice, the best way to overclock these chips is with finese rather than 'brute force' voltage increases. You might be stable at a given cpu frequency with say, 1.45v, but that does not mean it will be stable @ 1.5v even though 1.5v is > or equal to 1.45v. Sometimes more voltage is actually a bad thing, even if you're under your thermal threshold.

So really the best way is to start at stock, determine what your maximum oc is with stock voltages, and more on from there.
Oh man...I need to check my post first before hitting the Submit button. There are some horrible typo's in them


Quote:
Originally Posted by gsk3rd View Post
I ran some prelim stuff but nothing concrete. I am actually having cooling problems with my TRUE. I have reseated some many times I think I need to clean the HS and cpu with some alcohol. My first seat after lapping I was idling around 28c now I can not get below 31c. Once I get a free moment I will do some actual tests on the NB. I did put 1.5v to the NB and cpu and the VRs were not as hot as they have been to the touch.
I reseated my Z600 yesterday with new AS5 and it had a temp drop of 2C, but now I'm back on the same temp I had before. It's like it needs to be burned in or sumfn, dunno.
But you are getting same idle temps when where you didn't lap your TRUE?

I did some fan swapping inside my case, mounted the Scythe Ultra KAZE 3000rpm at the back of my case and a 12cm 1250rpm CM-fan on the Z600.
I also have 2 fans at the top of my case sucking out the air at 1200rpm.

It seems to be that when I raise the Kaze Ultra speed to pull out all warm air works better than having it blowing all warm air through the Z600. The 3 CM 1200rpm exhaust fans can't handle the heat created by a 3000rpm fan, so my case temp starts to raise.

Got 2 Kaze Maru's 1900RPM on the way to help getting the warm air out f the case.
I think a WC setup would be the next thing I should think about rather than adding more fans, but looking at the current OC's on the 940 with WC, I doubt it will be worth it.
Edited by XenoMopH - 2/12/09 at 6:54am
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post #1027 of 2829
Quote:
Originally Posted by XenoMopH View Post
Oh man...I need to check my post first before hitting the Submit button. There are some horrible typo's in them
Haha, dw about it! I'm the king of typos and gramatical errors, and I'm always hoping I can edit my post before it's quoted to fix them. And tbh, I read it as if it had no typos at all I would not have noticied if you had not said anything!

Also there seems to be little difference between high end air and water it would seem, as you said. Chew over at XS also noticied the same thing, and I believe its because the temperature difference between high end air and water (excluding very chilled water) is not significant enough to produce better clocks on average. Your cpu stepping, motherboard make/quality would probably play a larger role.

However, you could always keep the water setup for another system if you decided to use it! And there are always other inherent benefits when going water, such as less noise, and less variance/greater consistency in temps as ambient temps are less of a factor.
Edited by Drin - 2/12/09 at 10:42am
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post #1028 of 2829
I think my problem is going for a stable clock also means getting the most power out of it. Like tweaking the NB to get the best cpu score in 3dmark06 instead of trying to get the best cpu clock. I think I am going to go for this instead of trying to max everything at once. sometimes starting from the beginning is better.
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post #1029 of 2829
wow i wish my 780a would run like that...thats sweet heres my best set up that runs stable!!!!

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post #1030 of 2829
HERES MY 3DMARK SCORES I FORGOT TO INSET ON LAST POST.....i know you dont really give a rats ass buts that ok !!!
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