Re: 3dfx Voodoo5 glitches
If that reading is in-circuit, that's usually normal. Most resistors will/should read lower resistance in-circuit due to possible other parallel resistances with them. If the resistance reads on the high-side in-circuit (that is, over 5%, or whatever tolerance the resistor specifies), then it's probably bad.
Out of circuit readings, though, the resistor resistance should be close to the stated value (that is, within its %1/2%/5% tolerance).
So your resistors reading lower is not necessarily a concern. But if you want to be sure, remove them from the card and measure them again. Most likely, they are fine.
If those are GeForce 9800 GT cards with single slot coolers, it's no surprise they fail again. To date, I haven't found ONE 9800 GT card with a single-slot cooler that runs cool. Most just bake themselves to death, even in idle mode (typically often starting at 56-58°C). Under load, it's not uncommon to see them go up in the 80-90°C range, and that is absolutely unacceptable. So again, no wonder they fail.
Your best bet is to get one that still works and hasn't failed or been reflow yet, and replace that shitty single-slot cooler with something better. Better yet, see if you can undervolt the GPU chip a little like they do with the 9800 GT Green/Eco/Environmentally-Friendly editions (they are basically same as the regular 9800 GT cards, but just slightly underclocked and undervolted, which brings their overall TDP in the 60-70W range - probably still too high for the stock single-slot cooler, though). If you put a nice big cooler on one of those and keep them under 55°C at all times, they will last a long time.
Same goes for the AMD cards (I think), or at least the older ones like HD4k and older. I'm not sure about the HD5k cards, but HD6k, 7k, and 8k are definitely not as reliable and need to run even cooler. The x1k and x800/x700/x600 series are also iffy.
Originally posted by Justin1091
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Out of circuit readings, though, the resistor resistance should be close to the stated value (that is, within its %1/2%/5% tolerance).
So your resistors reading lower is not necessarily a concern. But if you want to be sure, remove them from the card and measure them again. Most likely, they are fine.
Originally posted by Justin1091
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Your best bet is to get one that still works and hasn't failed or been reflow yet, and replace that shitty single-slot cooler with something better. Better yet, see if you can undervolt the GPU chip a little like they do with the 9800 GT Green/Eco/Environmentally-Friendly editions (they are basically same as the regular 9800 GT cards, but just slightly underclocked and undervolted, which brings their overall TDP in the 60-70W range - probably still too high for the stock single-slot cooler, though). If you put a nice big cooler on one of those and keep them under 55°C at all times, they will last a long time.
Same goes for the AMD cards (I think), or at least the older ones like HD4k and older. I'm not sure about the HD5k cards, but HD6k, 7k, and 8k are definitely not as reliable and need to run even cooler. The x1k and x800/x700/x600 series are also iffy.
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