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 Voltmodding Gecube 9550 Rev2.1, This is not a question, but a guide!

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phunkydude
post Mar 6 2005, 01:50 AM

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okie... thanks very much for your useful info.. tongue.gif
rx8
post Mar 6 2005, 12:26 PM

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good card u got there.. the pcb is actually a real 9600pro/xt board.
its easily to find a good bios thats compatible....

wats ur marking on the ram?? the wordings

btw, when did u got it and where? think this version is quite rare.

thks
CHAILEE
post Mar 6 2005, 12:31 PM

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QUOTE(phunkydude @ Mar 5 2005, 07:03 PM)
below are front and back of my pcb...
i only found the same ic at the front of my pcb (circled with yellow)
i can't find any of it at the back of my pcb.....

hmm...  bout the green " [  ] " that i draw... izzit the location that i need to use pencil to draw " [ ] " ? ....  2 side? or just one side.. and which side...  tongue.gif

and another thing, how to check the vgpu ? ...  i didn't see any vgpu in my bios... got vcore lah..  tongue.gif
*
your RAM is 5ns


This post has been edited by CHAILEE: Mar 6 2005, 12:46 PM
phunkydude
post Mar 6 2005, 12:32 PM

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i got it at kuching pc fair , .... i satisfy with default core clock 459mhz ,
but the ram seems lousy.. default at 200mhz ... only able to oc to 250mhz... it's 5.0ns !!!!!!! such a lousy ones...
jammix
post Mar 6 2005, 01:27 PM

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my gecube 9550 extreme only able to reach 450/650
do i need to increase the AGP voltage to 1.7v?
i try 1.6v still can get higher smile.gif
rx8
post Mar 7 2005, 10:52 AM

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QUOTE(jammix @ Mar 6 2005, 01:27 PM)
my gecube 9550 extreme only able to reach 450/650
do i need to increase the AGP voltage to 1.7v?
i try 1.6v still can get higher smile.gif
*
I think its not advisable for stock HSF to go beyond 1.6V...
But then, i can reach 500Mhz at 1.48V....
how come ur one at 1.6 can only do 450Mhz??

A 9600xt is doing 500Mhz at 1.5V also... since its the same core, i think it should be the same....

Its not adviseable becoz i reckon the stock HSF is not so efficent in term if working outside stock value. The lifespan of the product might shorter due to the excessive heat.

Maybe u can follow Dead_man and mod a AMD HSF on the core before ocing more.


rx8
post Mar 7 2005, 10:55 AM

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QUOTE(phunkydude @ Mar 6 2005, 12:32 PM)
i got it at kuching pc fair , ....  i satisfy with default core clock 459mhz ,
but the ram seems lousy..  default at 200mhz ...  only able to oc to 250mhz...  it's 5.0ns !!!!!!! such a lousy ones...
*
U r one unlucky man, got a good PCB with these ram... wat a waste...

500 is not bad already.. also I believe the RAM speed dun affect as much as the CORE speed.

U see a big difference in 400Mhz and 500Mhz??
but 100Mhz difference in a core can be alot.

maybe can attach some ram sink on the ram and clock more.
wat is the brand of the ram btw??

jammix
post Mar 7 2005, 01:08 PM

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QUOTE(rx8 @ Mar 7 2005, 10:52 AM)
I think its not advisable for stock HSF to go beyond 1.6V...
But then, i can reach 500Mhz at 1.48V....
how come ur one at 1.6 can only do 450Mhz??

A 9600xt is doing 500Mhz at 1.5V also... since its the same core, i think it should be the same....

Its not adviseable becoz i reckon the stock HSF is not so efficent in term if working outside stock value. The lifespan of the product might shorter due to the excessive heat. 

Maybe u can follow Dead_man and mod a AMD HSF on the core before ocing more.
*
my default is 1.5V but only can reach 450/650
when i set it to 1.6v still can't increase the core speed
mine is samsung 3.3NS
rx8
post Mar 7 2005, 05:30 PM

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QUOTE(jammix @ Mar 7 2005, 01:08 PM)
my default is 1.5V but only can reach 450/650
when i set it to 1.6v still can't increase the core speed
mine is samsung 3.3NS
*
huh... wait a minute...

wats ur edition of card again??
and wats ur core??
TSDead__Man
post Mar 7 2005, 06:45 PM

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he's talking about the vAGP option in the mainbaord bios. it rarely affects overclockability.
^KamilskaZ^
post Mar 7 2005, 11:15 PM

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man...u are dead....congrats to you

just to follow ur instruction

This post has been edited by ^KamilskaZ^: Mar 7 2005, 11:15 PM
jammix
post Mar 8 2005, 01:04 AM

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QUOTE(rx8 @ Mar 7 2005, 05:30 PM)
huh... wait a minute...

wats ur edition of card again??
and wats ur core??
*
mine is REV 2.1
default core is 432/277
rx8
post Mar 8 2005, 01:02 PM

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QUOTE(jammix @ Mar 8 2005, 01:04 AM)
mine is REV 2.1
default core is 432/277
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do the pencil mod then....
die_257
post Mar 17 2005, 10:12 AM

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I tried the mod. For the core I got it running at 535 at 1.63v.
But..... i have no luck with the memory though.
Accidently applied too much voltage for it.
Now got those vertical line artifact all over the place.
I think i fried my gc. doh.gif
Solutions?










TSDead__Man
post Mar 17 2005, 05:39 PM

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well, did you remove the graphtie line again? i once bumped up my voltage to 3v artifacts, removed the graphite line, and presto, it worked again.
rx8
post Mar 17 2005, 07:06 PM

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QUOTE(die_257 @ Mar 17 2005, 10:12 AM)
I tried the mod. For the core I got it running at 535 at 1.63v.
But..... i have no luck with the memory though.
Accidently applied too much voltage for it. 
Now got those vertical line artifact all over the place.
I think i fried my gc. doh.gif
Solutions?
*
brave soul, btw.. default cooling??

die_257
post Mar 18 2005, 10:48 AM

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Dead_Man
I did remove the graphite line but the artifacts are still there.
I give it another try this weekend.

rx8
I'm on VGA Silencer Rev 3
Now I'm bock on my old trusty geforce2 mx100

This post has been edited by die_257: Mar 31 2005, 01:13 PM
ikanayam
post Mar 18 2005, 10:59 AM

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I just got mine today, and i must say i am rather disappointed with this card. It seems cheaply made all round. The PCB has sharp edges which they did not bother to sand down and the stock heatsink screams CHEAPY. Doesn't even contact the memory chips properly.
rx8
post Mar 18 2005, 02:00 PM

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QUOTE(ikanayam @ Mar 18 2005, 10:59 AM)
I just got mine today, and i must say i am rather disappointed with this card. It seems cheaply made all round. The PCB has sharp edges which they did not bother to sand down and the stock heatsink screams CHEAPY. Doesn't even contact the memory chips properly.
*
serious? I think its pretty decent. The stock cooler is rated quite good compared to other brand in fact.... u shd check out other brand's stock HSF.

Other brand dun even bother to cover the RAM with anything....

Cant really expect much from stock HSF.

That cap they used is from sanyo... thats kinda good in fact.

sharp edges.... dunno about that. I havent see a card with round edge thou....
U know of any??

Btw, im not a fanboy of this card... just posting my own opinion.

Also, its probably not wise to get this card at the moment due to the 6600non pro series....
TSDead__Man
post Mar 27 2005, 01:59 AM

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(i'd like to thank arj to moving this to essential reviews and guides)

btw, the coltage regulation ic has an input of 12v. my overclocking of core seems to be limited after setting the voltage over anything than 1.6v. i believe the core might not be getting enough current (not voltage, remember two diff things here).

if i connect my psu 12v to the ic's 12v input will my core get mroe current? i'm askling mroe the absolute vmod pros or electronic experts here. would appreciate any info.

here the ic datasheet:
http://www.onsemi.com/pub/Collateral/NCP1571-D.PDF

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