Thats exactly what I did, works fine.Quote:
Originally Posted by Reznik Akime
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Thats exactly what I did, works fine.Quote:
Originally Posted by Reznik Akime
This may sound a bit silleh.. But.. Is there a certian way you have to solder the caps to the board to make it work right? Like is there a negative and positive to the cap? If so, Which one leads to the ground? I can see markings on the cap that I assume indicate which way the flow of the electricity goes, but theres one thats just got dashes and no arrows on it..
The polarity of the caps are always marked, get the polarity wrong it may :explode:
Ehehe.. I dunno how to read the polarity.. But from what I gathered, the direction in which the arrows are pointing is the negative point which goes to the ground?
Yes either a -- or ¦ sign at one side should indicate the negative point of the cap...
Yeah. I figured it out. I got it runnin right now with just a cap and am doin a few benches.. Although im not too sure I can clock the memory much higher than 870 still..
When I break 900, rthdribl shows red artifacts and the games that had present artifacts still shown em proud. So ya think a vmem mod is in order here? I would rather see some pics of it done before I attempt it..
the resistor value i need is the last one in the row of 3 that you can use for the mod. last one meaning towards the molex end of card. so far card is working fine but its acting like the vddq or vref is wacked as my vddr is normal.
again the last resistor in the line of 3 that are pointed out as moddable points.
Irk.. Something went wrong. I got ahold of the 100K resistors and put them on to do the memory vmod.. although I must have soldered something wrong (All the soldering was done on the chip itself, no alt points used.. Dumbass..) and when I wriggled the wire, it shut the card off.
I thought to myself.. "Alright.. Thats commin off." So I take it off and all and looked at the pins under a magnifying glass to make sure nothing was bridged. Satisfied, I put it back in and it booted just fine! It goes into windows, and as I started up aim I looked away, but when I look back just a second later, the screen is dead! So I then try to restart it, but nothing. It goes through the normal boot procedures, but I cant see any of it. I then take off the cap and all, and its just fine again! Boot back into windows and ran rthdribl to make sure i didnt damage anything, and it was fine. No artifacting or anything, monitored the temps, everything normal.
Satisfied, I decided to keep it running, figuring it was okay. Well.. it wasnt! It took about 20 min for the card to shut off again, and now it does the same thing, Shows the boot procedure.
What I wanna know is.. Why does it shut off and not want to come back on, I assume untill you let it rest? I dont think anything is overheating and I removed the bridges (Or so I assume..) With a desoldering wick. I also made sure the pins were contacting well afterwards.
Whats causin it?
Oh, And I checked that resistor. Although im more than likely reading it wrong.. Its rated at.. 1? or.75..
This thread was a great read :). Is it possible that the power regulators on the 6800gt's are overheating when doing the 1.4v bios mod? As i notice that the black heatsink gets dam hot even at 1.3v, i run a vf700 now and it keeps its warm though :toast:
I am just wondering if the people who did 1.4v and lost their cards were using water or an NV5 which would make them run hot ontop of the 1.4v?
Yes, to a certain degree overheated but much more likely overloaded.Quote:
Originally Posted by orig3n
1.4V put a "lot" more strain to those 2 core related regulator chips or whatever it is :D, underneath that heatsink.
Ultra's uses 3 chips for the core which is 50% more powerfull, that's why Ultra's are more stable at higher core clock speed.
Under the heatsink it's also one chip for the mem, which seems to be sufficient. The mem voltage of ~2.02V is very stable even with a massive mem OC of 1250 MHz.
Ultra's have 2 of those chips for the mem.
:slobber:
Maybe thats what my deal is.. The board has a golden burn tinge to it in the corner where those things rest.. and it wasnt like that before I attempted the mod.
Is there anyplace where I can buy the same regulators that are used on an NU?
Well.. I just put in an order with IR for the two mofsets I assume are busted. Heres hopin thats all it is. Could that be what it is though? Seems like it would be with how its acting and all. It will only run for about 30 seconds before shutting off, then it wont come back on for some time. You have to keep the card out of the CPU for a while, then when ya put it back it, it does the same ol crap.
Hi! The link to that picture doesn't work. I have a gainward 6800LE and I would love to see that pic. There is a pic for the capacitor mod for the gward, but I couldn't find a picture of a vmem mod for gward.Quote:
Originally Posted by zadah
I was hoping to do the vmem and capacitor mod. Did anyone save that pic for the gw vmem mod on their computer before the link died?
Zadah you seem to be from Finland so I'll post this question also to muropaketti if you happen to go there also.
This thread is great! I have been searching for a vmem mod for my 6800le for quite some time.
Thanks!
Can anyone give a link or part number for the mosfets on the 6800 GT for the vmem and vcore than can be replaced/added on top? I would really like to try this and see how far it will get me along with the added molex.
there isn't any need of this pic actually cause all mods are referenced on the first post and all 6800 LE / NU share the same PCB ;)Quote:
Originally Posted by disciple
oh :). GREAT! Thanks DGB.
Could someone please measure the value of this Resistor :
http://home.comcast.net/~dmpickard/GPUpoint.bmp
I saw this post and felt that I had to reply ASAP, but my own account isn't mod approved yet so I'm on this one.Quote:
Originally Posted by Del Gro Badeu
The gainward boards don't all use a reference design! I know for a fact that the 6800NU boards from Gainward do not use the NU reference design, and I've been trying to figure out what the differences are, and if there's something different to do for the mod.
EDIT: this post seems silly after I realized that the pic in the first post is of a gainward board (although I dunno if that board was actually modded, or if it was just used for a pic? The other pic is a different board).
so mods gotta aprove ur account now before you can post? I didn't know that
Other than different caps used on the PCB, I've yet to see a 6800NU board that deviates that much from the reference design other than using superior quality caps etc...Quote:
Originally Posted by fackinlogins
Post a high resolution image of it if you have one that is significantly different from the reference 6800LE/NU design. :)
Well I can't find any particularly high rez pics, but here's a review with pics of the 6800NU (they call all their cards "ultra" in their product line but this is the NU board) 128MB version:
http://www.nvnews.net/reviews/gainwa...le/page2.shtml
It looked almost identical to the GT PCB when there was a shot of the two side by side, except the GT heatsink is a lot bigger than the NU heatsink so I couldn't see if there were actual differences.
I bought one recently though, and it's sitting in my campus post office waiting to be picked up but the post office is closed today (I got there before it closed but had to mail something and by the time I was done the pickup area was closed) so I'll have it tommorrow. I'll take some high rez pics of it.
I have the 256MB 6800NU version so it might be different from the pics linked.
EDIT: Boy I feel like an idiot, I just realized the PCB is the exact same one linked in the first post here, so whatever non-reference design it has the mod probably works on it anyway =p
Just got overly worried about people frying their 6800's =p Proceed as usual ;)
I can't wait to get mine tommorrow...I'm hoping to take this mod past just the capacitors if I have some time and can get ahold of some of those power regulation chips.
I was thinking maybe there's a way I could build a power regulation daughter card of sorts on a custom traced PCB. Problem is that it'd actually be kinda expensive to do so, but if I'm bored enough we shall see =)
You are mistaken, that card above you gave in the link based on the images is a reference 6800NU card, the reference 6800GT PCB is closer to that of the Ultra...
nobody can measure that resistor value?
Quote:
Originally Posted by Jethro
It is not a resistor, resistors are black and ceramic capasitors are brown, its a ceramic capasitor... try replacing it with same size component, if you are using resistor you are volt modding :) !
woah interesting. thanks for the reply Zadah. I have replaced it with similar component and the only way i could get it to work was buy penciling it some. value is not specific here>?
Card is working great btw other than the memory seems really handicapped
now.
Good information btw, learn more every day ;)