Well what I decided to do was RMA the card regardless, because it's been acting very strange since I bought it. The first week I had it, it was always in the "red" by the monitoring software, and it didn't perform nearly as well as three other Tachyon owners cards did. They all RMA'd their cards, and like the ones they got back better (at least two of them do, the third guy is still fighting with Tyan trying to get an RMA).
I have a feeling when you send them back the card, they remove the "pads" over the memory, and/or some other modifications? I don't know, but I don't want to void the warranty, until I'm at least confident the card is working at default speeds. I hadn't done any game playing with the card until recently, and demo's only last about 7 minutes; well after playing UT3, and a few other games the card just black screen's after 20-30min. And if it posts again, the temps are all in the red! I think it's a cooling problem, and I'd rather let them do what ever their doing to fix it prior to my modding it. But thankyou for the advice!