Basically, I published a contract that minted some stupid coins to be traded with my co-works every time someone does someone a favor. But these guys are not crypto-nerds like us, they just need a way to easily send/receive the tokens via QR codes.

Is there anything out there that supports non-ETH tokens on the Ethereum blockchain and has multi-platform/webapp support? I tried MEW via the web, but I can't get a camera to pop up for the To Address field, which is a non-starter.

Looking at 16x to 4x riser cables, it seems like most of them are unpowered. Are powered risers required for mining on 16x to 4x conversions? What about 16x to 1x?

I have seen a few cards out there (like the ASUS Rampage IV Extreme LGA 2011) that carry 4+ 16x PCI-e slots. In fact, the Rampage IV Extreme carries seven.

I am not familiar with Crossfire, but it's my understanding that the max number of GPUs this feature will support is four. Does this mean I can only mine with four cards per board?