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adpr 02
10-28-05, 09:12 AM
Hey guys. I had my 7800 which I voltmodded and worked great. I voltmodded it further but it wouldn't go any higher. I think it is that the card isn't getting enough electricity.

I used my psu power connecter with it. I noticed that my EVGA power connecter has 2 molex imputs. Should I plug in two molexes into that pci-e connector? Thx.

ViN86
10-28-05, 10:41 AM
in the words of Mr. Garrison "im not touchin this one with a 10 ft pole..."

btw, id quickly un-volt-mod your card. it kills it.

adpr 02
10-28-05, 05:40 PM
I had a preety good Idea what I did wrong. When I used a pencil, I overshot my desired resistance of 580 (from 620) a couple of times, and I kept eracing the v-mod. After a while, some VERRY small amounts of lead got touching other resistors so I had that thoroughly cleaned up. I then re-voltmodded my card to 581ohms and I managed to OC it 1350mhz. That is up from 1160mhz I had stock voltage OC'd, which is up from 1000mhz with stock 7800gt clocks.

so basically my v-mod allowed me to raise it's speed another 200mhz (or more than double my previous OC)


I am waiting for a guy to give me a bios with a modded V-core so I can OC my core also from that measly 460mhz up to HOPEFULLY around 550mhz.

einstein_314
10-28-05, 06:39 PM
Umm, pretty sure your card is going to die. But nice overclock none the less...I guess. I just wouldn't expect the card to last very long...

adpr 02
10-28-05, 10:19 PM
OH. I DO have adequate cooling. I have copper ramsinks, and my vf700 is around 32C on idle, never higher than 60 under load....

TierMann
10-28-05, 10:27 PM
OH. I DO have adequate cooling. I have copper ramsinks, and my vf700 is around 32C on idle, never higher than 60 under load....

Atleast it'll die cool? Nice OC but there's more than heat to worry about too. It can only take so much voltage.
Modding with a pencil is kind of iffy too because you still have graphite dust.

einstein_314
10-28-05, 10:28 PM
I don't think it's the temp that frys it (although it would if it got too hot). I think the higher voltage will break things. I may not be right on this but people who volt modded their 6800's, despite the fact that they were running at good temps, ended up dying after a couple of months.

jAkUp
10-28-05, 10:51 PM
yea, its not really the temps that kill it. its more the voltage regulators, or other parts of the card. Yea, you can view your core temps, but what about the other parts of your card? It was just not designed to work with that much voltage.

Rytr
10-28-05, 11:37 PM
I agree, design is the key. While there is usually some design headroom included for obvious reasons it is limited. Exceeding this design threshold can severely stress components as well as the traces themselves I would think.
In the past I have done volt-mods on a number of pc components, some with good results...most not! Graphic cards come under the 'not' category.:D

adpr 02
10-29-05, 01:34 AM
I had some instabilities with lost coast. I brought the speed down to 1250mhz and I'l leave it there as it's UBER stable.

Have you guys heard of the guy who took his 7800gt from 400/1000 to 680/1700? now THAT"s an overclock. Also, supposedly 1.37ghz is fairly common with a voltmod. I don't know anybody who has a dead card yet, and if it dies 50% faster than normal, then boo-hoo. It'l last me 5 years instead of 10. Of course I'l sell it in 1 or 2 years anyway so I don't care.

jAkUp
10-29-05, 01:36 AM
I always use dead hardware as an excuse for an upgrade :D

adpr 02
10-29-05, 01:43 AM
I always use dead hardware as an excuse for an upgrade :D


AMEN.


EDDIT. I have modified every videocard I ever owned (9200, 5200, 9600, 6600gt, 7800gt) so far I have never in my life messed up a piece of hardware that actually had any value. Sure I took a baseball bat to my P2 250mhz pc, but that doesn't count.

Rakeesh
10-29-05, 03:32 AM
You migrate too many electrons through a chemical and you really increase the probability of altering its chemical state, possibly rendering it useless for e.g. conductivity. Doing this to the little tiny parts inside of the ICs is a very bad thing.

Rytr
10-29-05, 11:24 AM
Ah, if you don't care then that makes all the difference.

ViN86
10-29-05, 12:01 PM
indeed, its your card man, OC the hell out of it if you want, we just dont want to see a ""OMG!!!111 MY 7800GT IS FRIEDZ0RS" thread

hehe :D