my oc adventure

hiya

i decided to try to mod my system a bit
i've had excellent success in the past, and cringe when i dee guys using pencil mods ( sure it works, but ... not in my box )

i have a camera, at school, i use it to copy notes and stuff.

i have a 7900ggs to mod . and a msi k8n diamond.
it is running ok right now
i have a 3700 cpu that clock to 3+ on air ... ( good rev)

my last system i volt modded a radeon 9800 pro, it ran good for a long time in that configuration.
i just moved , and i grabbed what i could, all my tools and stuff are packed away. it may take awhile to sort it out. i love volt mods.

2g kingston
250x11
13
2.5,3,3,6,7,1T,16
pcie 121
lots of volts bios max if i remember
this is such a great board.
59-60 C on stock
cpu rev SH-E4

what PCB dyu have with the 7900GS? mine is a really wierd one and im looking for a gcore volt mod.

GD luck with it all...looks like it could be fun.

evga

evga
i havn't had a good look at it yet.
still playing with dividers and doing a "proper" oc.
but so far so good. i can easily get the 2.2 to over 2.8
but for some reason i can't seem to push my ram,
it just refuses to heat up at all, but that will change very soon.

as far at i can tell from gpu-z
evga 3842
G71 GS
i have seen two different ones
http://www.xtremesystems.org/forums/showthread.php?t=117617

and

http://www.overclock.net/nvidia/162983-how-volt-mod-your-7900gs-newbs.html

i think mine is the second one.
i intend to go 1.4 on the core and then see what happens with the mem.

right now i'm running 281 ht, cas 3, and a 5 cpu divider.
...i think i forgot to divide my ram .. yeah i did it is running at 240

My eVGA 7900GS FLEW when I voltmodded it. Went from a measly max of about 590mhz on the core to 745mhz with 1.55v! I did a small pencil mod on the memory (~2.2-2.25v), but it ended up making my card unstable after playing for a while so I brushed it off and lowered the clock a bit. By the way, I used a circuit pen (whatever they're called) to mod my vcore, was really quick and easy. I found the tutorial on here actually. I'll try and find a link.

Guess it wasn't here. Oh well, here you are. That's 1.5v, I can't find the one for 1.55v. I know one of the points just under the ground is an extra 0.05v, but I don't want to tell you the wrong one. I'll try to pull my GS out and look and edit a pic to show you, if I remember.

The purple is what I added.


I would go all the way for 1.55v if you have the cooling I used a cheap VGA watercooler from newegg ($35) and I think it reached like 55C max. Good luck

k

just finished doing the mobo oc
1.45v 2.2 @ 2.75 = 69 C
1.375v 2.2 @ 2.74 = 60 C
i just bumped it up to 1.4 on cpu. it still stays cool enough.
i can get higher but i insist on 100% stability.

1.232v stock on vcard
i pulled out my stuff, got it all ready.
that is some seriously tiny solder points . heh
but it is all doable.
i want to do the 1.4 on a stock cooler
and i'll see if i can find a smd resistor to do the mem mod.
i maybe have one, should have one, but i'll have to dig for it.

woohoo

1.438 ish
after mod
that was some intense soldering
anyway done and done

i used ...

sn 63 pb 37 .015" solder.
attached it to the "pad" first then looped it around
attached a "blob" onto the track.
( looking carefully at the pcb, you can see it is just a hole that pokes through the track. )
then carefully attach the looped end onto the blob.
no wire. all just a solder wire.

pretty flippin' sweet it i say so myself

i am not a fan of pencil mods.
sure, it is a cheap and easy , and quite ingenious method.
but, from where i sit, it is seriously mickey mouse, when you can just go get
proper equipment for a few bucks, and do it like a pro.

i will leave it like that for awhile , and play around with the clocks after my heart settles down .. heh

Glad to hear you were successful! How are your temps and clocks with the added voltage?

And after pencil modding my vmem, I don't think I'll bother with it again. The stability problems were pretty troublesome. Although, I still think using a conductive ink pen is the way to go for small points and distances like the vcore.

seems ok

temp are under control
clocks to 653 @ 76C stable


pretty good . mem mod coming up.



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now for the mem.
2.01 stock v
.599 .600 K ohm ? i forget how to read my meter, and i lost _ALL_ my resistors. i got none. zip.( except the one off my old card, which for some strange reason appears to be the one i need )

so , if i got this right, the target is for 553-560 ohm ,
http://www.1728.com/resistrs.htm

which means i need a 8 K ish resistor....
the one off my old card is a 8.18 - which gives a 559 ohm resistance - the exact number.
but again, those are some wicked small solder points.
not too sure about this mod . i will think about it for awhile.

i pushed it hard and the temp went to 92C, so no vmem mod for me. seems stable enough 650/850
i could do it, i would attach "legs" onto the smd, then solder those down , or go to the store and see if they have these new ultra small devices on the shelf, which i doubt. because they are too small to solder by hand, ... for mere mortals ....