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winfast 8800 ultra (back from the grave) no more artifacts?

post #1 of 6
Thread Starter 
i used to play with my winfast 8800 ultra on fallout with ultra high settings no problem a while ago.

untill the fatefull day i decided to try nvidias 3dvision discover with red n blue tinted lenses. it started to artifact then packed up all together. frown.gif every boot of my pc arrifacted and windows never loaded.

i subsequently went a bought a 9800 gx2 which i use currently and its the d's b's

however today i took the 8800 all apart (why not, i was bored) and maticulously redid the thermal pastes, replacing thermal pads for paste.

i plugged it in to another older but similar rig not expecting much and all artifacts are gone and it works perfectly as far as i can tell (bout an hour on fallout so far)

just to check....is this regular? :s i thought artifacts were a pretty permanent thing. as i have said all works as it should in game but i am unsure how to check its "really" ok

i ask becasue i intend to sell it and i dont want complaints down the line,
post #2 of 6
Cant comment on your question, but it usually isnt recommended to replace thermal pads with paste. As there is a larger gap between the heatsink and vrms/mem chips than there is for the gpu.
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Craptop
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post #3 of 6
Thread Starter 
ive heard that also. i didnt have any pad around so i thought id suck it and see.

seems to off paid off smile.gif

dunno if the heatsink for this card different to others or not. as the iron/alu head padded parts seemed to of contacted as they are off-set properly from the main copper gpu core. they all made contact but were of a shocking finish (swarfy edges, mega scratches on surfaces), i polished them of beforehand. maybe this helped.

ill do some more testing and see what happens. there still pretty pricey for working cards as i remember (goes off to check ebay)
post #4 of 6
IF it does artifact again Microfractures on the solder joints on the PCB are really common on these cards, you can over bake the PCB to fix it ( i have done this to 3 cards now)

http://hardforum.com/showthread.php?t=1421792
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THE HAF
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post #5 of 6
Thread Starter 
i tried this method a while back on my old gtx 7900.

however i read the instructions for a non-fan oven : S all the capacitors fell off so i had to solder them back on and "suprisingly" the card wouldn't even boot afterwards.

im guessing it got to hot for to long. so 385 deg f for 8 - 10 mins?

if this one starts playing up again ill give that method a try

thanks
post #6 of 6
Let me tell you my story:

(if you don't have the patience, please skip to the last part of the text, my dillemma is there)

I've bought an EVGA 8800 Ultra at about the 4th hand and, elementary, the card had been opened by some peasant before.
At first I didn't look very carefull at the connections between the memory chips and the main heatsink, I just checked the dust.

Plugged it in my Lancool PC-K58 case (very well vented) and worked fine... until it booted Windows.
Then artifacts were allover the place. Even GPU-Z didn't find much about it, only a few fields were written and most of them with "0" value.
Not to mention the Device Manager window that marked it with a problem.

Took it apart, found out that the imbecille who opened it swapped the original memory thermal pads with some sort of gauze drenched in some sort of ordinary paste and this mess was allover.
The GPU on the other hand had some sort of cement on it (actually the IHS) which was cracked allover.

Bathed the whole stuff in about 1 litre of isopropyllic alcohool, cleaned it thoroughly with a soft brush and started remaking the whole cooling apparatus.
Bought brand new thermal pads and Arctic Silver 5 paste.
Mounted the pads on the memory and after I've checked the memory contact I've noticed an immense gap between the IHS and the large HS. About 1.2mm.

Now how the hell am I suppose to fill that gap with thermal paste?
Keep in mind that it isn't that large because of the memory thermalpads, even without them the gap is still about 1mm thick.

So in order to at least test it, i've folded several aluminiul foils cut to the IHS's dimension with AS5 on both sides and fitted the main HS.

To my actual surprise, IT BLOODY WORKED !
I've even managed to run 3D Mark Vantage and about 30 minutes of Arcania in full detail without any artifacts what so ever. GPU-Z and Windows found my card specs ok and i almost cried of joy.

But I've stopped there with the testing, given the defficitary GPU cooling. I'm very afraid to not have to reball the thing.

Actual status:
GPU Temp: 65'C idle and 103'C peak value. The average full load temperature balances between 88-97'C, according to GPU-Z's graph.
Cooler status: stock, but always works in full speed. Although the latest version of GPU-Z doesn't show the fan speed (akwardly for my other 8800GT it does), from what I can hear the cooler screams (given the fact that all my case is filled with ultra low noise low speed fans) from the start to the shut down and doesn't seem to modify it's speed according to the load.

What can I put between the IHS and the primary HS in order to efficiently cool the card to normal values ? What can be used to fill that immense 1mm+ gap ?

Thick ThermalPad seems like a workaround solution, but although I have no clue what W/mK means, the 6W/mK the Arctic tp has over the 15W/mK the AS5 paste has doesn't sound like a good idea.

Thanks.


PS: I've noticed you guys spoked about the oven trick.
Made it myself for an EVGA 8800GT SC and it worked. For about a week.
So, for whoever is enthusiastic about it, don't do it. It doesn't last.
Edited by georgeleus - 3/15/16 at 1:15am
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