LuckyX2

I just vmodded my 8800 and now my pc wont post ani have just a black screen. I measured vgpu and set it at 1.35v but my mem wont go below 2.33v. Could it be from ovp? And why cant I lower the vmem more? I know im not at the trimmers limit yet because it doesnt make the clicking sond that trimmers make when they are at their limit. thank you for any help.

__________________
19.2k 3dMark06 E8500/260gtx
5.1ghz E8500 validated
615mhz FSB E8500/EP45-UD3P validated

SergeRY

Did you do vmod of the memory too? You might try turning the voltage down on the memory. in fact I see people having the best luck with LOWER than stock Vmem.

LuckyX2

Yes I did the Vmem mod too but wound up unsoldering it because I was unable to get it below 2.35v. Now without the mod my GPU volts are set at 1.35v and mem is at 2.1v(stock)

I also added capacitors in parallel on the back of my motherboard and did a vdroop mod. So once I started having a problem I unsoldered all the mods except the capacitors(they are on the back of the motherboard, and I didnt feel like taking it out) After unsoldering everything I was still having the problem so im guessing it was the caps. This weekend I will be unsoldering the caps too and I will see if that helps

__________________
19.2k 3dMark06 E8500/260gtx
5.1ghz E8500 validated
615mhz FSB E8500/EP45-UD3P validated

SergeRY

OIC. can u try the card in a different board? I know doing everything at once is fun, maybe stepwise next time for trouble shooting are you going for extreme cooling? good luck with the de-mod. keep us posted

LuckyX2

I know that step wise is best but yeah, I was stupid and had to do it all at once and now I am regretting it.

And I cant try the GPU in another computer (because of the watercooling on it) but I can try another GPU with my mars which I am planning on doing this weekend. Is it possible that I killed my 8800GTS? All I did was take off the heatsink, cleaned off the core/mem with rubbing alcohol, put on the watercooling block and mem sinks, volt modded it, put it in my computer, turned it on and adjusted the volts. BTW everything was done on a glass table, so there shouldnt be any static. I really hope I didnt kill something

And about the extreme cooling, Im gonna be sticking with water for a while but may be adventurous and try some Dice/Ln2 in the spring.

__________________
19.2k 3dMark06 E8500/260gtx
5.1ghz E8500 validated
615mhz FSB E8500/EP45-UD3P validated

SergeRY

hard to say, always the possibility with vmodding. check the solder points to see if there is any stray solder or heat damage. there are so many possibilities that you just have to try a few things to figure out what went wrong. BTW I think glass can have a static charge as it is an insulator and is bad at dissipating electric charge. good luck

LuckyX2

Oh, thats good to know, I always though it didnt produce any static charge for some reason.

Well anyway, whenever it was set on the table it was laying down on the heatsink so the actual pcb never touched anything. I checked the solder points, and they are all good. One minor thing I ran into was that the Vgpu solder pad ripped off the board, but thanks to some zoomed in macro shots of the trace I saw that it went directly to the resistor right next to it, so I soldered it to that. That should work fine, correct? The trace led right to it, and no where else so it is the same as if it was soldered on the pad.

Well I guess I will find out just by undoing things and trying a different gpu etc.

I wont be able to try anything until the weekend, expect updates on Friday/Saturday.

Edit: I see you have two 8800GTS 512's and a Q6600, what kind of 3dmark scores do you get with that setup? thanks

__________________
19.2k 3dMark06 E8500/260gtx
5.1ghz E8500 validated
615mhz FSB E8500/EP45-UD3P validated

SergeRY

There is a small point right above the resistor that u need to solder to, not the resistor itself (I think). at least that is what is indicated in the xtremesystems.com thread: http://www.xtremesystems.org/forums/...d.php?t=168788

that point has worked for me. also the ground ripped off on my card so I ended up just bolting it to the ground pint on a mounting hole.

with 2 cards, 20.5k
single 17.5k
with dual core: 20.9K

see attached

Attached Thumbnails

     

LuckyX2

yea, I followed that thread and the pad right underneath the primarion(spelling?) chip is the one that broke off. But the trace led directly to the resistor below it and thats what I soldered it to.

__________________
19.2k 3dMark06 E8500/260gtx
5.1ghz E8500 validated
615mhz FSB E8500/EP45-UD3P validated

SergeRY

to me it looked like a lone spot coming through the board, so I steered clear of the resistor below... could be your problem, not sure. I'll take another look later.