Before you go buy or if you have already, the U1 and the U2 mine at basically the same speed. No difference in hashrate generally except for the fact that the U2 has a heatsink. U1s are generally cheaper and will perform at the same hashrate. Only big difference is U1 uses the 55nm BM1380, U2 uses the 28nm BM1382. Both are outdated chips, and even with free electricity the gain from them is miniscule.
The cooling on the U1 is terrible. The metal "heatsink" does almost nothing, and you're better off cutting it out and applying thermal paste and drilling a hole in for a homemade cutout heatsink.
The cooling on the U1 is terrible. The metal "heatsink" does almost nothing, and you're better off cutting it out and applying thermal paste and drilling a hole in for a homemade cutout heatsink.
With prices though buying neither makes sense compared to buying compac. It at least get's you the most for your money. And if you plan to run it ... yes it's a lotto or learning rig. Your better off spending and buying BTC vs these mini rigs. But that is not much fun.
I don't see neither U1 or U2 really making much sense, unless you happen to already have them.
Than you for the advice... yeah you're right, buying bitcoins is not really fun. I already have 1 antminer u1 and 1 block erupted (333khs). I know that's ridiculous and i'm thinking to upgrade it.
