Quote from: Maniac479 on November 17, 2012, 07:07:30 AM

Can someone explain clock speed? Is this the same as "core"? The slider on 50miner makes this easy to control- not the case on any other guiminer like GUIminer, so I'm switching from GUIminer to 50miner. I mine on 50btc anyway.

There are four sliders on 50miner:

Core ( 80-875 MHz)
Memory (150-1200 MHz)
VDDC (.950-1.163 V)
and Fan Speed (1-100%)

The only one I really understand is fan speed. I now think it's possible that the card was overheating- because without any tweaking (auto), the card used to run automatically at 70% fan speed. With 50miner set on auto fan speed the fan speed was down to 40%. Why would this be? I used to mess around with all these settings using MSI Afterburner or the overclocking controls that come with the driver, but the card used to run fine without any tweaking. Now it seems to want to run at a lower fan speed. So I have bumped the card up to 70% fan speed and lowered the other controls. And yes, I did get this card used on Ebay. I've been getting around 250 mega hash with it for a little over a month.

If this one fries or is fried, I will try another one... but I wouldn't want to spend more than $200 on one.

Also 50miner displays the temperature. I don't think GUIminer does. How do I know what temperature should worry me? It's running at 60C/140F

Clock speed simply refers to the frequency at which computational device runs. In your case, my suggestion would be to reduce the clock speed of your Memory (Meatball's suggestion of doing this increments is good, but ideally you will want to be in the low triple digits, so 25Mhz at a time might be a bit extreme), and your Core. You can also play with the VDDC (lowering) as you lower. It will be a lot of little tweaking, to find a stable point, and you might not find one if the GPU is just dying.

60C is nothing to worry about. I believe most people suggest 85C as an upper limit, and I ran my cards over 90C for months (I regret this, but what's done is done).

I still also recommend a video stress test, as I suggested before. Visual feedback is very helpful, and easily understood (clipping/ errors / bad frames etc.)