Quote Originally Posted by ericab View Post
a couple of questions...

based on what Bail_w said,



after i've done the soldering and reinstalled my card into the pci-e slot, what should the GPU resistor be set to (BEFORE turning on the power supply) ? 500ohm? 250ohms? 100ohms? 50ohms ?

also; what is the MAX recommended voltage we should be putting through the GPU ?

also, lets say i want to get a core of 900MHz.... what voltage do you expect will necessary to achieve this ?
You want to measure the resistance of the VR before you solder it in. Set it to 450-500 Ohms. Once you solder it in you'll be measuring the resistance of the entire circuit, and it should be ~13-15 Ohms iirc.

Max voltage is personal preference. So far I've stayed at 1.35v-idle on good air. If you're on water you should be able to go higher...or if you have cold ambient temps on air. LN2/DI...even higher. Temps are very important, though. Once you get over 50-55*C more voltage won't help much...it might make things worse.

Some guys go much higher on the voltage. If you're fine w/ possibly killing your card then go for it, but if that is going to put your PC out of commission then you should probably be more conservative.

As for 900MHz...I haven't gotten there on air, but perhaps 1.45v-idle? It really depends on how good your chip is. It seems like it takes a lot more voltage than might be prudent to go from 864 to 900MHz.

Best bet is to start out at like 1.25v-idle, and see what she'll do...then move up a bit. It sounds like you just want to set it to something, and go for it, but that's not the best way to find a max.