hmm i found something nice ^^
""Hey zipp0r, some new information on a possible solution for you. I came across this post on Anandtech which mentioned cleaning the areas around the pencil vmods. Well, I thought, what the heck let's give it a shot. Sure enough, my 7900GT stopped blanking on me. However, my memory overclocks were still limited to around 800 vs. the 880 I had gotten when I first overclocked the card.
I looked at the back of the board against the light and noticed that there was all sorts of residue left over from the assembly/soldering. Most of the time, the assembly factories do a quick wash to get rid of all the flux material on the circuit boards. This is usually good enough. However, when we start doing our mods, we're not always too careful and lay our sweaty, oily hands right across the components. This adds conductive paths across circuits and causes instabilities.
Here's what I did and what I recommend:
1. Get a bottle of 90% Isopropyl alcohol. Pure acetone (nail polish remover) should also work.
2. Get a roll of paper towels.
3. Take one paper towel, saturate a corner of it with alcohol.
4. Scrub vigorously the areas around the chips that control the memory and gpu voltages. Also scrub the components opposite each the ram chips. As your paper towels shreds, soak a fresh corner and continue. IMPORTANT: Don’t put your hands or fingers on the freshly scrubbed areas!
5. Get a clean paper towel and rub vigorously, sopping up all the alcohol. DO NOT BLOW ON IT TO DRY!
6. Hold up the board at an angle and look for any traces of residue. Use a magnifying glass if necessary. Repeat steps 4 and 5 is any residue is detectable. The board should look absolutely shiny.
7. Do your volt mods. DO NOT blow on the board to dry or to blow away graphite from a pencil mod. This will leave residue from the moisture on your breath. Use a can of compressed air instead (if you use an air compressor, make sure it has fresh oil and moisture filters).
8. Put your video card back into your system holding it only by the edges and bracket.
After you do this, your results hopefully will be similar to mine –
7900GT before cleaning:
GPU = 630MHz @ 1.4V and high fan speed (VF900), no artifacts, no blanking
Memory = 800MHz @ stock volts, no artifacts, no blanking
-- with pencil volt mod, 840MHz, no artifacts, but lots of blanking.
7900GT after cleaning:
GPU = 650MHz @ 1.4V and LOW fan speed (VF900), no artifacts, no blanking
Memory = 940MHz @ STOCK volts, no artifacts, no blanking!!
My 7900GT is now rock solid stable even at the low fan speeds."
morgen iedreen flesje aceton halen en cleanen die handel
690/....